Galvanic App Galvanic Pulse Galvanic Voice Navigation Equipment

GALVANIC WORKSSailing Apps · Group Review · October 2026

▶ The sailing-app group review · October 2026

The Sailing App Group Review

Natalie Smith · Founder & CCO · October 2026

Published by Galvanic Works S.L., which makes the Galvanic Sailing app, the companion app for Galvanic Voice, which appears in this comparison. The app is free to download, with a guided tour of every tab: chart, weather and position work on any phone, and the full app needs a Galvanic Voice aboard. There is no subscription; official nautical charts, when offered, will be a paid extra charged per boat. Nothing was physically tested: this is a documentation review.

October 2026 edition. Every product, mark and price as published by its maker on the date of checking; our own prices and terms as of 23 October 2026.

Galvanic Voice prices and terms, as of 23 October 2026. Galvanic Voice €1,149.50 incl. 21% Spanish VAT (€950 ex-VAT), on pre-order until 31 October 2026 for delivery in Q4 2026, with two Galvanic Pulse bracelets as standard and six during pre-order. Extra Galvanic Pulse bracelets in packs of 1, 2 or 4 at €242, €363 or €484 incl. 21% Spanish VAT (€200, €300 or €400 ex-VAT). The Galvanic Sailing app is free to download; official nautical charts, when offered, will be a paid extra charged per boat.

140APPS COMPARED
WITH OURS

The Galvanic Sailing app is free to download

Download on the App Store Get it on Google Play

What we found

One app for the chart, another for the weather, a third for the anchor. We read the published documentation of 140 sailing apps to see how many of a boat’s sixteen jobs each one covers: 78 appear in only one of the sixteen tables.

Besides our own, we looked at 140 products across sixteen of the jobs a boat actually needs doing: the chart, the forecast, the traffic, the anchor, the logbook, the service record, the crew, the engine. 78 of them appear in only one of those jobs’ tables, and 20 in three or more. That is why the phone of anyone who sails ends up with a folder of them, one for the weather, one for the log, one that watches the anchor, each with its own account, its own subscription and its own idea of what your boat is called.

The money follows the same shape. 158 of 251 entries here carry a subscription or a freemium tier, so a boat running five apps is running five renewals. That is why every product here that does more than one job is costed over twenty-four months rather than shown at its sticker price.

Two other things are worth knowing before you choose any of them. Working without a signal is worth checking first: of the 177 entries whose makers say either way, 100 keep doing their main job fully offline and 65 manage it with a limit, which matters more than it sounds the first time you lose coverage in a bay. And of the 196 entries whose makers say where their alarm sounds, 137 sound only on the phone, tablet or computer running the app, against 40 that sound from something fitted on the boat and 19 that do both. Roughly one in three is documented to make a noise the boat itself can hear.

What follows is 251 entries covering those 140 products across sixteen categories, with our own app in the fifteen where it has a job to do, each compared on the same columns.

We make one of the products here, and we built it to be the best all-round sailing app: one app for the jobs that otherwise take a folder of them. This review lets you check that claim job by job. It does not score or rank us against the specialists in each category, because an app built for one job will always document more of that job than an app built for the whole boat. Each category says instead who its specialists are, and what we bring to it.

The point of the review

One app for the whole boat

These are the sixteen jobs this review covers, and every product that appears in three or more of their tables. Of the other products, 78 appear in one table and 42 in two. A tick means the product is in that category’s table below; what it does there, mark by mark, is in the table itself.

Product	Weather	Weather routing	Charts	AIS & traffic	Instruments	Remote monitoring	Anchor watch	Crew overboard	Voice alerts	Log books	Crew watches	Maintenance	Performance	Crew fatigue	Crew aboard	Engine & fuel	Jobs
Galvanic Sailing app	✔		✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	15 of 16
Aqua Map Boating			✔	✔			✔		✔								4 of 16
Boat Beacon				✔				✔	✔						✔		4 of 16
Maretron N2KView					✔	✔	✔		✔							✔	5 of 16
moodSailor	✔		✔	✔			✔	✔		✔							6 of 16
NMEAremote					✔				✔							✔	3 of 16
NV Charts	✔		✔	✔	✔		✔			✔							6 of 16
OLAS N2K								✔	✔						✔		3 of 16
OpenCPN		✔	✔	✔	✔											✔	5 of 16
Orca		✔	✔	✔	✔		✔	✔		✔					✔	✔	9 of 16
qtVlm		✔	✔										✔				3 of 16
Salt & Wire Companion	✔		✔	✔			✔	✔		✔	✔	✔					8 of 16
Savvy Navvy		✔	✔	✔			✔										4 of 16
SeaGuardian						✔				✔					✔		3 of 16
SEAiq			✔	✔					✔								3 of 16
Simrad: Companion for Boaters	✔		✔	✔			✔										4 of 16
Siren Connected Boat						✔						✔				✔	3 of 16
TIMEZERO TZ Navigator		✔	✔	✔						✔							4 of 16
TZ iBoat			✔	✔	✔												3 of 16
Vesper Cortex (Cortex Onboard / Cortex Monitor)						✔	✔		✔							✔	4 of 16
Yachtara	✔	✔					✔				✔	✔					5 of 16

Why it adds up

One boat, one set of data

Most specialists in this review read their own slice of the boat. The Galvanic Voice reads the boat’s instruments and the crew’s bracelets once, and brings that data together wherever it is needed. Each card below is one source of data and what it feeds, with the section of the Galvanic Voice manual that describes it; the manual can be read at galvanicworks.com/products.

Galvanic Pulse bracelets, worn by the crew

Crew overboard: the alarm when a bracelet is no longer heard, with the position (manual §26)
Crew aboard and ashore: who has left the boat and who has come back (manual §26)
Crew fatigue: rest and activity, measured from the bracelet (manual §27)
Crew watches: vibration reminders to the person on watch (manual §28)
Equipment: a bracelet can be paired to a harness or other kit (manual §29)

Galvanic Pulse bracelets kept aboard and not worn

Weather: sea state, shown with the boat's own readings (manual §40)
Crew fatigue: sea state, which reduces the recovery credited for rest (manual §27)
Sailing performance: sea state, alongside the boat's own instruments in the polar (manual §43)

GPS position

Anchor watch: the drag alarm and the swing circle (manual §41)
Log books: every trip, built automatically (manual §42)
Crew overboard: the position where the bracelet was last heard (manual §26)
Remote monitoring: the boat's position, seen ashore (manual §50.2)

AIS receiver

AIS and traffic: collision warnings (manual §39)
Charts: AIS targets drawn on the chart (manual §38)
Log books: AIS encounters kept with the trip (manual §42)

Wind sensor and barometer

Weather: the boat's own readings beside the forecast (manual §40)
Anchor watch: wind and pressure-fall alarms at anchor (manual §41)
Sailing performance: true wind for the polar (manual §43)
Remote monitoring: the harbour wind warning, sent to your phone (manual §47, §50.6)

Depth sounder

Anchor watch: the shallow-water alarm (manual §41)
Log books: depth warnings kept with the trip (manual §42)

Engine

Engine and fuel: engine alarms, spoken aloud (manual §17.5)
Log books: engine hours filled in at each fuel stop (manual §42)
Boat maintenance: engine hours counted for service intervals (manual §49.9)
Sailing performance: motoring and motorsailing kept out of the polar (manual §43)
Remote monitoring: engine data seen ashore (manual §50.2)

Alerts, whatever raised them

Voice and audio alerts: spoken aloud on board; cautions can be set to stay silent (manual §17)
Log books: alerts that fire during a trip, kept in the trip log (manual §42)
Remote monitoring: the anchor alarms, man overboard and the harbour wind warning sent to phones ashore (manual §50.6)

How the review works

The categories in this review are the jobs a boat needs doing. Within each category every feature column is shown for every product, including the columns our own app does not have. A few columns kept in the data are left out of the tables for every product alike, and the appendix lists each one. No product is given an overall score or place; each category names the specialists that document the most of it instead.

A feature is marked ✔ only if the maker’s own manual or advertising copy says the app does it: the product page, the help centre, the user manual, the official app-store listing, or the maker’s own published advertising, posts and videos. Marketing copy counts, because a maker is answerable for what it advertises, and this review holds our own app to that same rule and no looser one. Every mark was checked twice, the second time against the maker’s own manual or user guide wherever one is published. Our own marks follow the same rule: they are taken from the Galvanic Voice manual and our own published copy, the product page and the app’s store listing. Where neither has yet caught up with the app, the mark rests on our own dated statement, which the appendix gives with the mark’s sources. A feature documented with a limit, such as a paid tier only or one platform only, is marked ~. Needing hardware does not halve a mark, whether it is the maker’s own box or a sensor on the boat. A feature the maker does not document is marked ?, whether or not the app might do it in practice.

A cross means the absence is established, not merely unmentioned: either the maker’s own complete feature list, tier table or manual settles that the feature is not there, or we have surveyed the whole category and established who has it. Spoken alerts are the second kind; where a maker’s own material could not be read in full, the mark stays a question mark. A question mark means the maker does not say, and we are not going to guess. The distinction is only about what we are willing to assert about someone else’s product.

Prices are shown for every app, and free tiers, wearables and how alerts reach you ashore wherever the maker states them. Apps that do several jobs appear in each category they fit. Tides and currents, marinas and cruising guides, and learning and rules are not in this review, because the Galvanic Sailing app has no feature there. Weather routing is included even though our app does not route, so readers can still compare the routers. Shared columns, such as No subscription or Works offline aboard, are judged for the job in each table, so the same app can carry a different mark in another table.

Three categories, crew fatigue and sleep, crew aboard and ashore, and engine and fuel, are compared against the apps in this review that do the nearest job: the watch planners; the man-overboard apps and crew-tag systems; and the engine monitors, monitoring hubs and logbooks.

In remote monitoring, “alerts reach people ashore” is marked from the alert channels each maker documents: any push, text, email, messaging or voice-call alert that leaves the boat counts. “Man overboard and its position seen ashore” counts any documented way for someone ashore to see a man-overboard event and where it happened, whether by text message or in the app. “Alarm sounds from hardware aboard” means a device other than the phone running the app, such as a chartplotter, a hub, an instrument display or a horn; a second phone or tablet left below does not count, and neither does the computer running the software itself.

Remote monitoring shows both the siren aboard and the alert spoken aloud, and the second one is worth explaining because you are, by definition, not there. Remote rarely means abandoned. A noise on the boat matters in that category because it deters and because it wakes somebody: the crew still aboard, or the neighbour two berths down. A voice naming the fault does that job better than a siren, which anyone within earshot will assume belongs to another boat. One of the fifteen other products here documents spoken alerts, and one more does with a limit, so this is a column few can answer.

✔ documented
~ documented with a limit
✘ established absent
? the maker does not say

Category

Weather

On a phone the comparison grid is replaced by the verdicts below, one per app, which carry the same marks in words. The grid is there on a wider screen.

The specialists that document the most of this table: Squid, PredictWind and LuckGrib. What the Galvanic Sailing app documents that the others mostly do not: Alerts spoken aloud (documented, fully or in part, by 0 of 17 others); Alarm sounds from hardware aboard, not the phone (documented, fully or in part, by 0 of 17 others); Onboard sensor data (documented, fully or in part, by 2 of 17 others).

17 apps compared with ours on 13 features.

App	Alerts spoken aloud	Alarm sounds from hardware aboard, not the phone	No subscription	Every phone and tablet, no per-device fee	Works offline aboard	Multi-model forecasts	Forecast download for offline use	Wind/wave map overlays	Pressure/barometer trend	Weather alerts/notifications	Onboard sensor data	Forecast download over satellite	Offline weather download, free	Price, as published
Galvanic Sailing appGalvanic Works S.L. · Android 7.0+ on Google Play; iOS 15.5+ on the App Store; phones and tablets	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	free to download; the full app with a Galvanic Voice aboard · Galvanic Voice €1,149.50 incl. 21% Spanish VAT (€950 ex-VAT) · chart, weather and position free on any phone, and a guided tour and simulation of every tab; no subscription; official nautical charts, when offered, will be a paid extra charged per boat
LuckGribCraig McPheeters · iOS; macOS	✘	?	✔	~	✔	✔	✔	✔	~	✘	✘	✔	✔	one-off · LuckGrib Application: $29.99; Weather Routing: $59.99; Offshore Data: $59.99 (USD, pay once, not a subscription; 14-day free trial per product; purchases separate for Mac and iOS)
moodSailorSociété Française d'Infonuagique (France) · iOS 15.0+; Android	✘	✘	✔	✔	✔	✔	?	✔	?	?	?	?	?	free · No price published anywhere, in any currency. Free on both stores, no in-app purchase, no subscription, no pro tier, no ads. Maker: "The whole app, all of its features, for free." AIS arrives free over community networks (aisstream.io, pelyr.com).
Météo MarineMETEO CONSULT (La Chaîne Météo group), France · iOS; Android (carries ads)	?	✘	~	?	?	~	?	✔	?	~	?	?	?	freemium · Free with ads and in-app purchases. METEO CONSULT account subscriptions that unlock the app: Zen from €2.20 incl. VAT, Balise from €5, Traversée from €12, Phare from €22.
NautideIgoox SL (Spain), official app of tablademareas · iOS; Android (carries ads); 65 interface languages	?	?	~	?	?	?	✘	✘	✔	?	?	?	✘	freemium · Free download with restrictions. Nautide PRO monthly or yearly unlocks all sections and removes ads. No price is published outside the app stores.
NV ChartsNV Chart Group GmbH (Eckernförde, Germany) · iOS; Android; Windows 11/10/8; macOS 10.13+; browser web app at app.nvcharts.com	?	✘	~	?	✔	✘	?	✔	?	?	?	?	?	freemium · App free. Charts €49.90 per region per year, auto-renewing, 15 regions; or bundled with a paper chart in a combo pack with a one-year update service.
PocketGribNicholas Brennan · iOS/Android	✘	?	✔	✘	✔	✔	✔	✔	~	✘	✘	?	✔	one-off · £3.49 / €4.99 / US$5.99 (pocketgrib.com); App Store US $5.99
PredictWindPredictWind Limited · iOS; Android; web (PredictWind App, Offshore App, website)	✘	✘	~	✔	✔	✔	~	✔	~	~	✔	✔	~	freemium · DataHub $299, DataHub Pro $599 (predictwind.com/datahub/family) · Free $0 ; Basic $29 USD / Yearly ; Standard $249 USD / Yearly ; Professional $499 USD / Yearly (USD only, no region selector, 7 days free on paid tiers)
SailFlowWeatherFlow · iOS; Android (Google Play: SailFlow: Marine Forecasts); web	✘	✘	~	✔	✘	✔	?	~	~	✔	✘	?	✘	freemium · Plus $44.99/year or $5.49/month; Pro $119.99/year or $14.99/month; Gold $179.99/year or $21.99/month (secure.sailflow.com/features, currency symbol $; App Store US lists same amounts in USD plus 'Pro – Pay As You Go (auto-renewing)' $19.99 and Plus $3.99)
Salt & Wire CompanionMaciej Jan Karnowski, trading as Salt & Wire (Poland) · Android 7.0+ only; iOS in preparation, no date	✘	✘	~	✔	~	✘	✘	✔	✔	~	✘	?	✘	freemium · PLUS subscription, Google Play, three-day trial; no labelled price published. Google's in-app purchase range for the listing is EUR 9.49 to EUR 28.99, not confirmed as the PLUS price
Simrad: Companion for BoatersNavico Norway AS · iOS; Android. English only on iOS.	?	✘	~	?	?	?	✘	~	?	?	?	?	✘	freemium · Free tier plus a Premium subscription with a 14-day free trial (3-day in Denmark and Sweden). Navico publishes no price on any of its own pages; the figure exists only inside the app stores.
SquidD-ICE ENGINEERING · Windows; macOS; Linux; Android; iOS	✘	?	~	✔	✔	✔	✔	✔	~	?	✔	✔	✔	freemium · squid-sailing.com (EUR): Free €0.00/month; Hi-Res North America and Caribbeans €9.98/month or €33.98/year; Hi-Res Europe €9.98/month or €33.98/year; Hi-Res Mediterranean €19.99/month or €69.98/year; Hi-Res World and Satellite €69.98/month or €299.00/year (squid-sailing.com/en/offers, read 5 Oct 2026). App Store US: HIRES USA 1 Week $6.99, 1 Month $9.99, 3 Months $18.99, 1 Year $33.99; HIRES Europe 1 Week $5.99, 1 Month $9.99, 3 Months $18.99, 1 Year $33.99
Weather4D LiteAPP4NAV · iOS	✘	?	~	~	✔	~	✔	✔	~	✘	✘	✔	~	one-off + optional subscription · App $17.99 (USD, App Store US); App Store US in-app: 1 Year HD Forecast Subscription $39.99; 3 Months HD Forecast Subscription $17.99; weather4d.com comparison table: yearly high-res model subscription $37.99
WindfinderWindfinder.com · iOS/Android	✘	✘	~	~	✘	~	?	~	~	~	✘	?	✘	freemium · in euros: Windfinder Plus €12.99 a year (App Store, Germany) · App Store US: Windfinder Plus Yearly $12.99; Windfinder Plus monthly $1.99; ad-free 1 Year $4.99, 6 month $3.99, 3 month $2.49
Windy.appWindy Weather World Inc · iOS; Android; web	✘	✘	~	~	~	~	~	✔	~	✔	✘	?	✘	freemium · windy.app/pro (USD): Pro annual $64.99/year with 7-day trial; Pro lifetime $109.99 one-time ('special offer'). App Store US: WINDY PRO access for 1 month $9.99; other WINDY PRO account items $39.99-$164.99 (periods not stated per item; listing says 1 month and 1 year auto-renew periods)
Windy.comWindyty, SE · iOS/Android/web	✘	✘	~	✔	✘	✔	?	✔	~	✔	✘	?	✘	freemium · App Store US in-app purchases: Windy Premium $24.99; Windy Premium $2.99; Windy Premium $29.99 (billing periods not stated on listing); donation items $2.99-$49.99
XyGribOpenGribs · Windows/macOS/Linux	✘	?	✔	✘	✔	✔	✔	✔	~	✘	✘	?	✔	free (open source, GPLv3; free Grib server)
YachtaraAD Internet Consulting BV, Belgium (founder Bart Schillebeeks) · web app live; Android live (ai.yachtara.app); iOS not yet released	?	?	✘	?	✔	✔	?	~	~	?	✘	?	✘	freemium · Free EUR 0; Essential EUR 15 per quarter (about EUR 5 a month); Premium EUR 39 per quarter (about EUR 13 a month); an AI tier is marked coming soon with no price. Billed quarterly or annually, incl. VAT

The verdicts, one by one (18)

Galvanic Sailing appfree to download; the full app with a Galvanic Voice aboard · Galvanic Voice €1,149.50 incl. 21% Spanish VAT (€950 ex-VAT) · chart, weather and position free on any phone, and a guided tour and simulation of every tab; no subscription; official nautical charts, when offered, will be a paid extra charged per boat

Documented

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Multi-model forecasts
Forecast download for offline use
Wind/wave map overlays
Pressure/barometer trend
Weather alerts/notifications
Onboard sensor data
Forecast download over satellite
Offline weather download, free

Established absent

none

The maker does not say

none

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: free to download: chart, weather and position on any phone, and a guided tour and simulation of every tab (manual §38 and §40; store listing); the full app needs a Galvanic Voice aboard
Wearable: Galvanic Pulse bracelet (up to 16 per vessel): IP67 BLE 5.0 wristband with vibration motor, buzzer, LED and one button. Does: man-overboard alert when unheard for longer than the captain-set delay (from 10 s to 10 min, default 60 s) while under way; 'has left the boat' notice at anchor or in harbour; watch-reminder vibration with triple-tap acknowledge; rest and activity detection feeding the fatigue model (§27); can be paired to equipment such as a harness. Battery about 2 months, charges from USB. Limits: bodies, metal bulkheads, engine rooms and aluminium or steel hulls attenuate the BLE signal, so a sleeper lying on the arm can go unheard; every phone and tablet aboard with the Galvanic Sailing app acts as an extra listener for the Galvanic Pulse bracelets (Galvanic Pulse listening, §30). One Galvanic Voice is loud enough to wake the whole boat. People add more for convenience: with a unit close by, an alert can be silenced with a wave of the hand past it, wherever they are aboard. Range in metres not given in the manual. Manual describes no smartwatch app. (manual §23 to §34)

Sources: Galvanic Voice manual v0.642, read it at https://galvanicworks.com/products/: Galvanic Pulse §23 to §34; Galvanic Works, 23 Oct 2026 (forecasts download over any internet link aboard, satellite included); manual §35 (offline areas incl. Satellite and Meteo; no per-screen licences), §38 layers, §39 encounter animation, §41 optional anchor alarms, §43, §44.7, §44.8, §45.2.3, §49.9, §50.3, §50.4; manual §26 multi-unit

LuckGribone-off · LuckGrib Application: $29.99; Weather Routing: $59.99; Offshore Data: $59.99 (USD, pay once, not a subscription; 14-day free trial per product; purchases separate for Mac and iOS)

Documented

No subscription
Works offline aboard
Multi-model forecasts
Forecast download for offline use
Wind/wave map overlays
Forecast download over satellite
Offline weather download, free

Documented, with a limit

Every phone and tablet, no per-device fee
Pressure/barometer trend

Established absent

Alerts spoken aloud
Weather alerts/notifications
Onboard sensor data

The maker does not say

Alarm sounds from hardware aboard, not the phone

Free tier: 14-day free trial, or free access to reduced-resolution downloads (LuckGrib Lite)
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6] [7]

moodSailorfree · No price published anywhere, in any currency. Free on both stores, no in-app purchase, no subscription, no pro tier, no ads. Maker: "The whole app, all of its features, for free." AIS arrives free over community networks (aisstream.io, pelyr.com).

Documented

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Multi-model forecasts
Wind/wave map overlays

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone

The maker does not say

Forecast download for offline use
Pressure/barometer trend
Weather alerts/notifications
Onboard sensor data
Forecast download over satellite
Offline weather download, free

Alarm runs on: the phone, tablet or computer running the app
Free tier: everything, free

Sources: [1] [2]

Météo Marinefreemium · Free with ads and in-app purchases. METEO CONSULT account subscriptions that unlock the app: Zen from €2.20 incl. VAT, Balise from €5, Traversée from €12, Phare from €22.

Documented

Wind/wave map overlays

Documented, with a limit

No subscription
Multi-model forecasts
Weather alerts/notifications

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Alerts spoken aloud
Every phone and tablet, no per-device fee
Works offline aboard
Forecast download for offline use
Pressure/barometer trend
Onboard sensor data
Forecast download over satellite
Offline weather download, free

Alarm runs on: the phone, tablet or computer running the app
Free tier: free with ads

Sources: [1] [2]

Nautidefreemium · Free download with restrictions. Nautide PRO monthly or yearly unlocks all sections and removes ads. No price is published outside the app stores.

Documented

Pressure/barometer trend

Documented, with a limit

No subscription

Established absent

Forecast download for offline use
Wind/wave map overlays
Offline weather download, free

The maker does not say

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee
Works offline aboard
Multi-model forecasts
Weather alerts/notifications
Onboard sensor data
Forecast download over satellite

Free tier: free with restrictions and ads

Sources: [1] [2]

NV Chartsfreemium · App free. Charts €49.90 per region per year, auto-renewing, 15 regions; or bundled with a paper chart in a combo pack with a one-year update service.

Documented

Works offline aboard
Wind/wave map overlays

Documented, with a limit

No subscription

Established absent

Alarm sounds from hardware aboard, not the phone
Multi-model forecasts

The maker does not say

Alerts spoken aloud
Every phone and tablet, no per-device fee
Forecast download for offline use
Pressure/barometer trend
Weather alerts/notifications
Onboard sensor data
Forecast download over satellite
Offline weather download, free

Alarm runs on: the phone, tablet or computer running the app
Free tier: app free, charts paid

Sources: [1] [2]

PocketGribone-off · £3.49 / €4.99 / US$5.99 (pocketgrib.com); App Store US $5.99

Documented

No subscription
Works offline aboard
Multi-model forecasts
Forecast download for offline use
Wind/wave map overlays
Offline weather download, free

Documented, with a limit

Pressure/barometer trend

Established absent

Alerts spoken aloud
Every phone and tablet, no per-device fee
Weather alerts/notifications
Onboard sensor data

The maker does not say

Alarm sounds from hardware aboard, not the phone
Forecast download over satellite

Free tier: No free tier on iOS (paid app $5.99). Vendor versions page lists an Android 'Lite version initial release'; its contents are not stated
Wearable: Apple Watch appears in the App Store supported-devices data; no watch features described

Sources: [1] [2] [3] [4] [5] [6] [7]

PredictWindfreemium · DataHub $299, DataHub Pro $599 (predictwind.com/datahub/family) · Free $0 ; Basic $29 USD / Yearly ; Standard $249 USD / Yearly ; Professional $499 USD / Yearly (USD only, no region selector, 7 days free on paid tiers)

Documented

Every phone and tablet, no per-device fee
Works offline aboard
Multi-model forecasts
Wind/wave map overlays
Onboard sensor data
Forecast download over satellite

Documented, with a limit

No subscription
Forecast download for offline use
Pressure/barometer trend
Weather alerts/notifications
Offline weather download, free

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: push, email
Free tier: Free $0: 11 forecast models, wind/wave, Local Knowledge, Daily Briefing, GRIB Viewer (50 km resolution), GPS tracking. Alerts need Basic ($29/yr) or higher
Wearable: none stated for the forecast apps. Separate PredictWind Man Overboard app for Apple Watch (beta): needs a DataHub Pro onboard; tested/approved only on Apple Watch Ultra 3, Series 11 (watchOS 26.6) and Series 9 (27.0 beta); iOS app pending Apple review; Wear OS and Garmin watches not yet approved; Bluetooth must be disabled during use for reliable Wi-Fi reconnection.

Sources: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13]

SailFlowfreemium · Plus $44.99/year or $5.49/month; Pro $119.99/year or $14.99/month; Gold $179.99/year or $21.99/month (secure.sailflow.com/features, currency symbol $; App Store US lists same amounts in USD plus 'Pro – Pay As You Go (auto-renewing)' $19.99 and Plus $3.99)

Documented

Every phone and tablet, no per-device fee
Multi-model forecasts
Weather alerts/notifications

Documented, with a limit

No subscription
Wind/wave map overlays
Pressure/barometer trend

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Works offline aboard
Onboard sensor data
Offline weather download, free

The maker does not say

Forecast download for offline use
Forecast download over satellite

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: email, SMS, push
Free tier: Free: reports from 50,000+ free stations, free forecast anywhere, Live Wind, wind alerts via email/text/mobile, StormTrack, tides & currents, radar & satellite, NWS forecasts & warnings, wind archives/statistics
Wearable: App Store lists 'Apple Watch compatibility'; watch functions and limitations not described

Sources: [1] [2] [3] [4] [5]

Salt & Wire Companionfreemium · PLUS subscription, Google Play, three-day trial; no labelled price published. Google's in-app purchase range for the listing is EUR 9.49 to EUR 28.99, not confirmed as the PLUS price

Documented

Every phone and tablet, no per-device fee
Wind/wave map overlays
Pressure/barometer trend

Documented, with a limit

No subscription
Works offline aboard
Weather alerts/notifications

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Multi-model forecasts
Forecast download for offline use
Onboard sensor data
Offline weather download, free

The maker does not say

Forecast download over satellite

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2]

Simrad: Companion for Boatersfreemium · Free tier plus a Premium subscription with a 14-day free trial (3-day in Denmark and Sweden). Navico publishes no price on any of its own pages; the figure exists only inside the app stores.

Documented

none

Documented, with a limit

No subscription
Wind/wave map overlays

Established absent

Alarm sounds from hardware aboard, not the phone
Forecast download for offline use
Offline weather download, free

The maker does not say

Alerts spoken aloud
Every phone and tablet, no per-device fee
Works offline aboard
Multi-model forecasts
Pressure/barometer trend
Weather alerts/notifications
Onboard sensor data
Forecast download over satellite

Alarm runs on: the phone, tablet or computer running the app
Free tier: free tier plus Premium

Sources: [1] [2]

Squidfreemium · squid-sailing.com (EUR): Free €0.00/month; Hi-Res North America and Caribbeans €9.98/month or €33.98/year; Hi-Res Europe €9.98/month or €33.98/year; Hi-Res Mediterranean €19.99/month or €69.98/year; Hi-Res World and Satellite €69.98/month or €299.00/year (squid-sailing.com/en/offers, read 5 Oct 2026). App Store US: HIRES USA 1 Week $6.99, 1 Month $9.99, 3 Months $18.99, 1 Year $33.99; HIRES Europe 1 Week $5.99, 1 Month $9.99, 3 Months $18.99, 1 Year $33.99

Documented

Every phone and tablet, no per-device fee
Works offline aboard
Multi-model forecasts
Forecast download for offline use
Wind/wave map overlays
Onboard sensor data
Forecast download over satellite
Offline weather download, free

Documented, with a limit

No subscription
Pressure/barometer trend

Established absent

Alerts spoken aloud

The maker does not say

Alarm sounds from hardware aboard, not the phone
Weather alerts/notifications

Free tier: Free €0: global models ARPEGE and GFS, standard GRIB viewer, no credit card required
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

Weather4D Liteone-off + optional subscription · App $17.99 (USD, App Store US); App Store US in-app: 1 Year HD Forecast Subscription $39.99; 3 Months HD Forecast Subscription $17.99; weather4d.com comparison table: yearly high-res model subscription $37.99

Documented

Works offline aboard
Forecast download for offline use
Wind/wave map overlays
Forecast download over satellite

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Multi-model forecasts
Pressure/barometer trend
Offline weather download, free

Established absent

Alerts spoken aloud
Weather alerts/notifications
Onboard sensor data

The maker does not say

Alarm sounds from hardware aboard, not the phone

Alarm runs on: n/a (no alarms)
Free tier: No free tier (paid app $17.99; GFS model included, other models by yearly subscription)
Wearable: none stated (vendor comparison table ticks Apple Watch Support only for Routing & Navigation)

Sources: [1] [2] [3] [4]

Windfinderfreemium · in euros: Windfinder Plus €12.99 a year (App Store, Germany) · App Store US: Windfinder Plus Yearly $12.99; Windfinder Plus monthly $1.99; ad-free 1 Year $4.99, 6 month $3.99, 3 month $2.49

Documented

none

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Multi-model forecasts
Wind/wave map overlays
Pressure/barometer trend
Weather alerts/notifications

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Works offline aboard
Onboard sensor data
Offline weather download, free

The maker does not say

Forecast download for offline use
Forecast download over satellite

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free: forecasts for 160,000+ locations, live measurements from 21,000 stations, tide forecasts for 20,000+ locations, animated wind map, small widgets, severe weather warnings (US/Europe), with ads. Wind alerts, Superforecast, large widgets, ad-free are Windfinder Plus
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

Windy.appfreemium · windy.app/pro (USD): Pro annual $64.99/year with 7-day trial; Pro lifetime $109.99 one-time ('special offer'). App Store US: WINDY PRO access for 1 month $9.99; other WINDY PRO account items $39.99-$164.99 (periods not stated per item; listing says 1 month and 1 year auto-renew periods)

Documented

Wind/wave map overlays
Weather alerts/notifications

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Multi-model forecasts
Forecast download for offline use
Pressure/barometer trend

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Onboard sensor data
Offline weather download, free

The maker does not say

Forecast download over satellite

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: push
Free tier: Basic version free (GFS27 model, with ads); ECMWF, ICON13, WRF8, AROME, HRRR, NAM, weather archive, compare mode and offline mode are Pro; web version free
Wearable: Apple Watch widgets showing wind, gusts, wave energy, swell height & period (windy.app news post); limitations not stated. No Wear OS app shown on Google Play listing

Sources: [1] [2] [3] [4] [5] [6] [7] [8] [9]

Windy.comfreemium · App Store US in-app purchases: Windy Premium $24.99; Windy Premium $2.99; Windy Premium $29.99 (billing periods not stated on listing); donation items $2.99-$49.99

Documented

Every phone and tablet, no per-device fee
Multi-model forecasts
Wind/wave map overlays
Weather alerts/notifications

Documented, with a limit

No subscription
Pressure/barometer trend

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Works offline aboard
Onboard sensor data
Offline weather download, free

The maker does not say

Forecast download for offline use
Forecast download over satellite

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: push, email
Free tier: App is free (Google Play: 'absolutely free and even without ads'); Premium adds 1-hour & 15-day outlook with 4-6x daily updates, radar/satellite 24 h loops and 1-year archives, more maps incl. Tide Forecast, model comparison
Wearable: Wear OS app (Forecast, Radar, Tiles and Complication) per Google Play; Apple Watch weather widget (forecast, radar, METAR, weather stations, wind) per App Store; limitations not stated

Sources: [1] [2] [3]

XyGribfree (open source, GPLv3; free Grib server)

Documented

No subscription
Works offline aboard
Multi-model forecasts
Forecast download for offline use
Wind/wave map overlays
Offline weather download, free

Documented, with a limit

Pressure/barometer trend

Established absent

Alerts spoken aloud
Every phone and tablet, no per-device fee
Weather alerts/notifications
Onboard sensor data

The maker does not say

Alarm sounds from hardware aboard, not the phone
Forecast download over satellite

Free tier: free app (no paid tier)
Wearable: none stated (desktop Windows/macOS/Linux only)

Sources: [1] [2]

Yachtarafreemium · Free EUR 0; Essential EUR 15 per quarter (about EUR 5 a month); Premium EUR 39 per quarter (about EUR 13 a month); an AI tier is marked coming soon with no price. Billed quarterly or annually, incl. VAT

Documented

Works offline aboard
Multi-model forecasts

Documented, with a limit

Wind/wave map overlays
Pressure/barometer trend

Established absent

No subscription
Onboard sensor data
Offline weather download, free

The maker does not say

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee
Forecast download for offline use
Weather alerts/notifications
Forecast download over satellite

Free tier: Free EUR 0 plan; contents not stated

Sources: [1] [2] [3]

Category

Weather routing

On a phone the comparison grid is replaced by the verdicts below, one per app, which carry the same marks in words. The grid is there on a wider screen.

The specialists that document the most of this table: Expedition, LuckGrib, OpenCPN, qtVlm and SailGrib WR.

14 apps compared on 5 features.

The Galvanic Sailing app is not in this table. We do not do weather routing: the manual describes automated routing as planned, and although the app has the two things such a feature is built on, the boat's own measured polar and the forecast grid, having the ingredients is not the dish.

App	Isochrone routing	Uses boat polars	Departure-time planning	Weather forecast import	Offline routing	Price, as published
ExpeditionTasman Bay Navigation Systems Ltd. · Windows	✔	✔	✔	✔	✔	one-off · Licence €1250 (one-off); upgrade of licence bought before 1 Jan 2024 €275; LL1 Radar licence €1150; LL2 Radar licence €1850 (expeditionmarine.com/sales)
FastSeas · web	?	✔	✔	?	~	freemium · Basic: Free (Weather Routing and Departure Planning limited to 5 requests per month each); Premium: Yearly $60/year; Monthly $10/month; 6-Months $45/6-months (currency symbol $ as shown)
LuckGribCraig McPheeters · iOS; macOS	✔	✔	✔	✔	✔	one-off · LuckGrib Application: $29.99; Weather Routing: $59.99; Offshore Data: $59.99 (USD, pay once, not a subscription; 14-day free trial per product; purchases separate for Mac and iOS)
OpenCPNOpenCPN project (Android: Dave Register) · Windows; macOS; Linux; Raspberry Pi; Android	✔	✔	✔	✔	✔	free (desktop); one-off (Android) · Desktop free; Android USD 9.95 one-off (Google Play US)
OrcaOrca Technologies AS · iOS; iPadOS; watchOS; macOS (Apple M1 or later); Android; Orca Display	~	~	✔	✘	~	subscription · Orca Core 2 EUR 649; Orca Display 2 EUR 999; Charging Mount EUR 349 (getorca.com configurator, delivery to Europe) · Orca Plus EUR 49/year; Orca Smart Navigation EUR 149/year (help centre); App Store US in-app purchase list: Orca Plus USD 44.99, Orca Smart Navigation USD 159.99 and USD 89.99, Orca Subscription USD 129.00 (billing period not stated)
PredictWindPredictWind Limited · iOS; Android; web (PredictWind App, Offshore App, website)	?	~	~	~	✘	freemium · DataHub $299, DataHub Pro $599 (predictwind.com/datahub/family) · Free $0 ; Basic $29 USD / Yearly ; Standard $249 USD / Yearly ; Professional $499 USD / Yearly (USD only, no region selector, 7 days free on paid tiers)
qtVlmMeltemus SAS · Windows, macOS, Linux, Raspberry Pi (free); iOS, Android, Windows tablet (free basic, paid full version)	✔	✔	✔	✔	✔	free (desktop); one-off (mobile full version) · in euros: full version €59.99 (App Store, Germany) · Desktop (Windows, macOS, Linux, Raspberry): free; mobile basic version free, Full version in-app purchase: $49.99 (App Store US); donations optional (€10-€500)
SailGrib WRSailGrib · Android	✔	✔	✔	✔	✔	freemium · SailGrib WR is a free Google Play app with in-app purchases $17.99-$149.99 per item; Premium Option sold for 1 month, 12 months, or one-time "for life"
Savvy NavvySavvy Navvy ltd · iOS; iPadOS; Android	?	✔	~	✘	~	subscription · in euros: Elite €119 a year without the Denmark and Italy charts, €139 to €169 with them (App Store, Germany) · Essential GBP 59 per year; Explore GBP 95 per year; Elite GBP 99 per year (savvy-navvy.com pricing, 3-day free trial); App Store US in-app purchase list: Premium USD 99.00, Premium (US-only charts) USD 129.00, Premium Plus (global charts) USD 169.00 (billing period not stated)
SquidD-ICE ENGINEERING · Windows; macOS; Linux; Android; iOS	~	~	~	✔	✘	freemium · squid-sailing.com (EUR): Free €0.00/month; Hi-Res North America and Caribbeans €9.98/month or €33.98/year; Hi-Res Europe €9.98/month or €33.98/year; Hi-Res Mediterranean €19.99/month or €69.98/year; Hi-Res World and Satellite €69.98/month or €299.00/year (squid-sailing.com/en/offers, read 5 Oct 2026). App Store US: HIRES USA 1 Week $6.99, 1 Month $9.99, 3 Months $18.99, 1 Year $33.99; HIRES Europe 1 Week $5.99, 1 Month $9.99, 3 Months $18.99, 1 Year $33.99
TIMEZERO TZ NavigatorMaxSeaNaval · Windows PC (TZ iBoat is the iPhone/iPad companion)	✔	✔	~	✔	✔	TZ Navigator (store item 'TimeZero Rec'): €503 / $420 / £429; upgrade from older version €188 / $158 / £167; Weather Routing module €387 / $315 / £335; Furuno Radar or Sounder module €525 each. Licence type not stated in the store.
Weather4D RoutingAPP4NAV · iOS	?	✔	~	✔	✔	one-off + optional subscription · App: $39.99; High Resolution Models yearly subscription (in-app purchase): $37.99 (weather4d.com estimated USD pricing)
Weather4D Routing & NavigationAPP4NAV · iOS; iPadOS; macOS (Apple silicon); watchOS	?	✔	~	✔	✔	one-off + optional subscription · App: $59.99; High Resolution Models yearly subscription (in-app purchase): $37.99 (weather4d.com estimated USD pricing); App Store US lists 1 Year HD Forecast Subscription: $39.99
YachtaraAD Internet Consulting BV, Belgium (founder Bart Schillebeeks) · web app live; Android live (ai.yachtara.app); iOS not yet released	?	✔	✔	?	?	freemium · Free EUR 0; Essential EUR 15 per quarter (about EUR 5 a month); Premium EUR 39 per quarter (about EUR 13 a month); an AI tier is marked coming soon with no price. Billed quarterly or annually, incl. VAT

The verdicts, one by one (14)

Expeditionone-off · Licence €1250 (one-off); upgrade of licence bought before 1 Jan 2024 €275; LL1 Radar licence €1150; LL2 Radar licence €1850 (expeditionmarine.com/sales)

Documented

Isochrone routing
Uses boat polars
Departure-time planning
Weather forecast import
Offline routing

Established absent

none

The maker does not say

none

Wearable: none stated

Sources: [1] [2] [3] [4]

FastSeasfreemium · Basic: Free (Weather Routing and Departure Planning limited to 5 requests per month each); Premium: Yearly $60/year; Monthly $10/month; 6-Months $45/6-months (currency symbol $ as shown)

Documented

Uses boat polars
Departure-time planning

Documented, with a limit

Offline routing

Established absent

none

The maker does not say

Isochrone routing
Weather forecast import

Free tier: Basic free: Weather Routing and Departure Planning limited to 5 requests per month each
Wearable: none stated

Sources: [1] [2] [3]

LuckGribone-off · LuckGrib Application: $29.99; Weather Routing: $59.99; Offshore Data: $59.99 (USD, pay once, not a subscription; 14-day free trial per product; purchases separate for Mac and iOS)

Documented

Isochrone routing
Uses boat polars
Departure-time planning
Weather forecast import
Offline routing

Established absent

none

The maker does not say

none

Free tier: 14-day free trial per product; free reduced-resolution downloads (LuckGrib Lite)
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6] [7]

OpenCPNfree (desktop); one-off (Android) · Desktop free; Android USD 9.95 one-off (Google Play US)

Documented

Isochrone routing
Uses boat polars
Departure-time planning
Weather forecast import
Offline routing

Established absent

none

The maker does not say

none

Free tier: free on desktop; Android version USD 9.95 one-off
Wearable: none stated

Sources: [1] [2] [3]

Orcasubscription · Orca Core 2 EUR 649; Orca Display 2 EUR 999; Charging Mount EUR 349 (getorca.com configurator, delivery to Europe) · Orca Plus EUR 49/year; Orca Smart Navigation EUR 149/year (help centre); App Store US in-app purchase list: Orca Plus USD 44.99, Orca Smart Navigation USD 159.99 and USD 89.99, Orca Subscription USD 129.00 (billing period not stated)

Documented

Departure-time planning

Documented, with a limit

Isochrone routing
Uses boat polars
Offline routing

Established absent

Weather forecast import

The maker does not say

none

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: Free: online charts, points of interest, weather (5-day), automatic engine routing up to 50 NM, instruments/autopilot/radar (with Orca Core), AIS via internet, 7-day logbook; no sail routing and no offline charts
Wearable: Apple Watch appears in App Store supported-devices data; watch features not described by the maker

Sources: [1] [2] [3] [4] [5] [6] [7] [8]

Documented

none

Documented, with a limit

Uses boat polars
Departure-time planning
Weather forecast import

Established absent

Offline routing

The maker does not say

Isochrone routing

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: push, email
Free tier: Free $0: 11 forecast models, wind/wave, Local Knowledge, Daily Briefing, GRIB Viewer (50 km resolution), GPS tracking. Alerts need Basic ($29/yr) or higher. Weather Routing and Departure Planning need Standard ($249/yr)
Wearable: none stated for the forecast apps. Separate PredictWind Man Overboard app for Apple Watch (beta): needs a DataHub Pro onboard; tested/approved only on Apple Watch Ultra 3, Series 11 (watchOS 26.6) and Series 9 (27.0 beta); iOS app pending Apple review; Wear OS and Garmin watches not yet approved; Bluetooth must be disabled during use for reliable Wi-Fi reconnection.

Sources: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]

qtVlmfree (desktop); one-off (mobile full version) · in euros: full version €59.99 (App Store, Germany) · Desktop (Windows, macOS, Linux, Raspberry): free; mobile basic version free, Full version in-app purchase: $49.99 (App Store US); donations optional (€10-€500)

Documented

Isochrone routing
Uses boat polars
Departure-time planning
Weather forecast import
Offline routing

Established absent

none

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app
Free tier: Desktop (Windows, macOS, Linux, Raspberry) free. Mobile free version: full GRIB viewer, basic charts, simple instruments, Anchor Alarm module, shapefile viewer, GPS/NMEA position; routing, full instruments, raster/vector charts, tides/currents harmonics, Iridium GO! and AIS need the Full version
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6]

SailGrib WRfreemium · SailGrib WR is a free Google Play app with in-app purchases $17.99-$149.99 per item; Premium Option sold for 1 month, 12 months, or one-time "for life"

Documented

Isochrone routing
Uses boat polars
Departure-time planning
Weather forecast import
Offline routing

Established absent

none

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free app (SailGrib WR) with Premium Option (1 month, 12 months or one-time for life) giving 'access to all the features'; free-version contents not stated. Paid SailGrib WR Pro also sold
Wearable: none stated

Sources: [1] [2] [3] [4]

Savvy Navvysubscription · in euros: Elite €119 a year without the Denmark and Italy charts, €139 to €169 with them (App Store, Germany) · Essential GBP 59 per year; Explore GBP 95 per year; Elite GBP 99 per year (savvy-navvy.com pricing, 3-day free trial); App Store US in-app purchase list: Premium USD 99.00, Premium (US-only charts) USD 129.00, Premium Plus (global charts) USD 169.00 (billing period not stated)

Documented

Uses boat polars

Documented, with a limit

Departure-time planning
Offline routing

Established absent

Weather forecast import

The maker does not say

Isochrone routing

Alarm runs on: the phone, tablet or computer running the app
Free tier: Pricing page offers a 3-day free trial; App Store text says 'Try our free version' but its contents are not stated
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6]

Documented

Weather forecast import

Documented, with a limit

Isochrone routing
Uses boat polars
Departure-time planning

Established absent

Offline routing

The maker does not say

none

Free tier: Free €0: ARPEGE and GFS, standard GRIB viewer; routing needs a paid Hi-Res plan
Wearable: none stated

Sources: [1] [2] [3] [4]

TIMEZERO TZ NavigatorTZ Navigator (store item 'TimeZero Rec'): €503 / $420 / £429; upgrade from older version €188 / $158 / £167; Weather Routing module €387 / $315 / £335; Furuno Radar or Sounder module €525 each. Licence type not stated in the store.

Documented

Isochrone routing
Uses boat polars
Weather forecast import
Offline routing

Documented, with a limit

Departure-time planning

Established absent

none

The maker does not say

none

Wearable: none stated

Sources: [1] [2] [3] [4]

Weather4D Routingone-off + optional subscription · App: $39.99; High Resolution Models yearly subscription (in-app purchase): $37.99 (weather4d.com estimated USD pricing)

Documented

Uses boat polars
Weather forecast import
Offline routing

Documented, with a limit

Departure-time planning

Established absent

none

The maker does not say

Isochrone routing

Alarm runs on: n/a (no alarms)
Free tier: No free tier (paid app $39.99)
Wearable: none stated (comparison table ticks Apple Watch Support only for Routing & Navigation)

Sources: [1] [2] [3]

Weather4D Routing & Navigationone-off + optional subscription · App: $59.99; High Resolution Models yearly subscription (in-app purchase): $37.99 (weather4d.com estimated USD pricing); App Store US lists 1 Year HD Forecast Subscription: $39.99

Documented

Uses boat polars
Weather forecast import
Offline routing

Documented, with a limit

Departure-time planning

Established absent

none

The maker does not say

Isochrone routing

Alarm runs on: the phone, tablet or computer running the app
Free tier: No free tier (paid app $59.99)
Wearable: Apple Watch Support (iPhone) ticked for Routing & Navigation in vendor comparison table; App Store supported-devices data includes Apple Watch; watch features and limitations not described

Sources: [1] [2] [3] [4]

Documented

Uses boat polars
Departure-time planning

Established absent

none

The maker does not say

Isochrone routing
Weather forecast import
Offline routing

Free tier: Free EUR 0 plan; contents not stated

Sources: [1] [2] [3]

Category

Charts & navigation

On a phone the comparison grid is replaced by the verdicts below, one per app, which carry the same marks in words. The grid is there on a wider screen.

The specialists that document the most of this table: TIMEZERO TZ Navigator, OpenCPN, Orca and qtVlm. What the Galvanic Sailing app documents that the others mostly do not: Alarm sounds from hardware aboard, not the phone (documented, fully or in part, by 2 of 20 others).

20 apps compared with ours on 17 features.

App	Alerts spoken aloud	Alarm sounds from hardware aboard, not the phone	No subscription	Every phone and tablet, no per-device fee	Works offline aboard	Vector nautical charts	Raster nautical charts	Route planning	Auto-routing	Live instrument (NMEA) overlay	Track recording	Community/POI layers	Sync with chartplotter	Offline charts, free	Offline satellite map, free	AIS targets on the chart	Anchor zone shown on the chart	Price, as published
Galvanic Sailing appGalvanic Works S.L. · Android 7.0+ on Google Play; iOS 15.5+ on the App Store; phones and tablets	✔	✔	✔	✔	✔	✘	✘	✘	✘	✔	✔	✘	✘	✔	✔	✔	✔	free to download; the full app with a Galvanic Voice aboard · Galvanic Voice €1,149.50 incl. 21% Spanish VAT (€950 ex-VAT) · chart, weather and position free on any phone, and a guided tour and simulation of every tab; no subscription; official nautical charts, when offered, will be a paid extra charged per boat
Aqua Map BoatingGEC s.r.l. · iOS; iPadOS; macOS (Apple silicon)	~	✘	~	~	✔	✔	?	✔	✔	~	✔	✔	?	✘	✘	~	✔	subscription · in euros: Expert €14.99, Master €24.99, chart regions from €14.99 (App Store, Germany) · Chart subscription per region, 1 year (App Store US list, USD): US & Canada nautical charts 14.99 and 49.99; US – Nautical & Lakes charts 9.99; Canada 9.99; Bermuda 14.99; Caribbean South 14.99; Bahamas Explorer Charts 49.99; Bahamas Explorer Chartbooks 139.99. Expert: nautical chart cost + USD 14.99/year; Master (USA & Canada only): nautical chart cost + USD 24.99/year (aquamap.app). 14-day free trial
B&G AppNavico Norway AS (B&G) · iOS, Android	✘	?	~	✔	~	✔	?	✔	✔	?	~	✔	✔	~	✘	~	~	freemium · App Store US in-app purchase list (USD): Annual Subscription 14.99; Annual Subscription 29.99; Annual Subscription 49.99; Region 18.49 / 22.99; North America 22.99; Caribbean 31.99; Atlantic Ocean 54.99 (billing period stated only where named Annual)
C-MAP AppNavico Norway AS (C-MAP) · iOS, Android, PC (App Store text: available on Mobile, Tablet or PC)	✘	✘	~	✔	~	✔	?	✔	✔	✘	✔	✔	?	~	✘	~	?	freemium · Premium: Annual subscription USD 14.99 (App Store US in-app purchase list); other listed in-app purchases: Region USD 18.99, North America USD 23.49, Caribbean USD 32.99 (billing period not stated)
Garmin ActiveCaptainGarmin International · iOS; Android; web	✘	✔	~	✔	~	✔	✔	✔	~	?	?	✔	✔	~	✘	?	?	freemium · App is free; in-app chart purchases (App Store US e.g. g4 Vision U.S. South $129.99; GN+ U.S. South $149.99; U.S. LakeVü Detail Map $59.99)
iNavXNavX Studios LLC · iOS, Android	✘	✘	~	✔	✔	✔	✔	✔	?	✔	✔	~	?	~	✘	✔	✔	freemium · Chart subscriptions USD 9.99 to 199.99 annually depending on chart/provider (App Store text); AIS Live (AIS NMEA Selective Worldwide Coverage) USD 99.99; Theyr Premium Weather USD 49.99 (trial listed at 39.99); Theyr Premium – Mobile (Monthly) USD 9.99 (App Store US)
moodSailorSociété Française d'Infonuagique (France) · iOS 15.0+; Android	✘	✘	✔	✔	✔	?	?	✔	?	?	✔	✔	?	?	?	?	?	free · No price published anywhere, in any currency. Free on both stores, no in-app purchase, no subscription, no pro tier, no ads. Maker: "The whole app, all of its features, for free." AIS arrives free over community networks (aisstream.io, pelyr.com).
Météo MarineMETEO CONSULT (La Chaîne Météo group), France · iOS; Android (carries ads)	?	✘	~	?	?	?	?	~	?	?	?	?	?	?	?	?	?	freemium · Free with ads and in-app purchases. METEO CONSULT account subscriptions that unlock the app: Zen from €2.20 incl. VAT, Balise from €5, Traversée from €12, Phare from €22.
Navionics BoatingGarmin International · iOS; Android	✘	✘	✘	~	~	✔	?	✔	✔	?	✔	✔	✔	~	✘	✔	?	subscription · One-year subscription per chart region, garmin.com en-US store, USD: $49.99 (e.g. U.S. & Canada; UK, Ireland & Holland; Australia & New Zealand; Baltic Sea; China Sea & Japan; Pacific Islands; Africa & Middle East; Indian Ocean & South China; Mexico, Caribbean to Brazil; Chile, Argentina & Easter Island) ; $59.99 (Mediterranean & Black Sea; Central and West Europe; Adriatic & Ionian Sea) ; $99.99 (Scandinavia, South & Germany, North) ; $149.99 (Greenland & Iceland)
NV ChartsNV Chart Group GmbH (Eckernförde, Germany) · iOS; Android; Windows 11/10/8; macOS 10.13+; browser web app at app.nvcharts.com	?	✘	~	?	✔	✔	✔	✔	✔	~	✔	✔	?	?	?	?	?	freemium · App free. Charts €49.90 per region per year, auto-renewing, 15 regions; or bundled with a paper chart in a combo pack with a one-year update service.
OpenCPNOpenCPN project (Android: Dave Register) · Windows; macOS; Linux; Raspberry Pi; Android	✘	✘	✔	~	✔	✔	✔	✔	~	✔	✔	?	?	✔	~	✔	✔	free (desktop); one-off (Android) · Desktop free; Android USD 9.95 one-off (Google Play US)
OrcaOrca Technologies AS · iOS; iPadOS; watchOS; macOS (Apple M1 or later); Android; Orca Display	✘	✔	~	✔	~	✔	?	✔	~	✔	✔	✔	~	✘	✘	✔	✔	subscription · Orca Core 2 EUR 649; Orca Display 2 EUR 999; Charging Mount EUR 349 (getorca.com configurator, delivery to Europe) · Orca Plus EUR 49/year; Orca Smart Navigation EUR 149/year (help centre); App Store US in-app purchase list: Orca Plus USD 44.99, Orca Smart Navigation USD 159.99 and USD 89.99, Orca Subscription USD 129.00 (billing period not stated)
qtVlmMeltemus SAS · Windows, macOS, Linux, Raspberry Pi (free); iOS, Android, Windows tablet (free basic, paid full version)	✘	✘	✔	~	✔	✔	✔	✔	✔	✔	✔	?	?	~	✘	✔	✔	free (desktop); one-off (mobile full version) · in euros: full version €59.99 (App Store, Germany) · Desktop (Windows, macOS, Linux, Raspberry): free; mobile basic version free, Full version in-app purchase: $49.99 (App Store US); donations optional (€10-€500)
Salt & Wire CompanionMaciej Jan Karnowski, trading as Salt & Wire (Poland) · Android 7.0+ only; iOS in preparation, no date	✘	✘	~	✔	~	?	?	✔	?	✘	✔	?	?	✘	✘	~	✔	freemium · PLUS subscription, Google Play, three-day trial; no labelled price published. Google's in-app purchase range for the listing is EUR 9.49 to EUR 28.99, not confirmed as the PLUS price
Savvy NavvySavvy Navvy ltd · iOS; iPadOS; Android	✘	✘	✘	~	~	✔	?	✔	✔	~	✔	✔	~	✘	✘	✔	~	subscription · in euros: Elite €119 a year without the Denmark and Italy charts, €139 to €169 with them (App Store, Germany) · Essential GBP 59 per year; Explore GBP 95 per year; Elite GBP 99 per year (savvy-navvy.com pricing, 3-day free trial); App Store US in-app purchase list: Premium USD 99.00, Premium (US-only charts) USD 129.00, Premium Plus (global charts) USD 169.00 (billing period not stated)
SEAiqSakhalin, LLC · iOS (iPhone, iPad)	✔	✘	✘	~	✔	✔	✔	✔	?	~	✔	?	?	~	~	✔	✔	subscription · SEAiq: USD 15/year; SEAiq USA: USD 10/year (seaiq.com); App Store US: Premium Annual USD 15.00; legacy one-time Upgrade for Premium Features USD 49.99
Simrad: Companion for BoatersNavico Norway AS · iOS; Android. English only on iOS.	?	✘	~	?	~	✔	✘	✔	✔	?	~	?	?	?	?	?	?	freemium · Free tier plus a Premium subscription with a 14-day free trial (3-day in Denmark and Sweden). Navico publishes no price on any of its own pages; the figure exists only inside the app stores.
TIMEZERO TZ NavigatorMaxSeaNaval · Windows PC (TZ iBoat is the iPhone/iPad companion)	✘	✘	✔	✘	✔	✔	✔	✔	?	✔	✔	✔	✔	~	~	✔	✔	TZ Navigator (store item 'TimeZero Rec'): €503 / $420 / £429; upgrade from older version €188 / $158 / £167; Weather Routing module €387 / $315 / £335; Furuno Radar or Sounder module €525 each. Licence type not stated in the store.
TZ iBoatTIMEZERO (App Store seller: Nobeltec, Inc.) · iOS, Android	✔	✘	~	~	✔	✔	✔	✔	~	~	✔	~	~	✘	✘	~	✔	freemium · in euros: Essential €24.99 a year, Premium €84.99, Elite €334.99; charts a yearly subscription per region, Western Mediterranean €40.99 (mytimezero.com; App Store, Germany) · TZ MAPS chart subscription, yearly (USD, mytimezero.com directory, shown for information only): USA 19.99; Canada West 19.99; Great Lakes 19.99; Bahamas 30.99; Western Mediterranean 40.99; Eastern Mediterranean 61.99; UK, Ireland & the Channel 40.99; Baltic Sea 61.99; Skagerrak & Kattegat 92.99; Iceland, Greenland, Faroe 92.99. Plans monthly or yearly (vendor); App Store US in-app purchase list: Essential Subscription USD 2.99, Premium Subscription USD 9.99, Elite Subscription USD 39.99 (billing period not stated). One-off modules: Radar from USD 49.99, Sounder from USD 24.99
Waterkaartenbiggerworks bv (Amsterdam, Netherlands), formerly branded ANWB Waterkaarten · iOS; Android; free Windows version. One account on three devices.	?	?	✔	?	✔	✔	?	✔	?	?	✔	✔	?	?	?	?	?	credit, not a subscription · 7-day free trial, then a non-renewing credit: €15.99 for 31 days, €40.99 for 92 days, €55.99 for 365 days, full access.
Wärtsilä iSailorWartsila Voyage Sweden AB · iOS (iPhone, iPad, Apple Watch)	✘	✘	~	~	✔	✔	?	✔	?	~	✔	~	?	✘	✘	~	?	freemium · Chart folios as in-app purchases (App Store US, e.g. USA regional folios USD 4.99; Caribbean Sea Lesser Antilles USD 10.99); chart correction service annual auto-renewable subscription (price not stated); AIS Receiver Support USD 11.99; Tides & Currents subscription USD 11.99

The verdicts, one by one (21)

Documented

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Live instrument (NMEA) overlay
Track recording
Offline charts, free
Offline satellite map, free
AIS targets on the chart
Anchor zone shown on the chart

Established absent

Vector nautical charts
Raster nautical charts
Route planning
Auto-routing
Community/POI layers
Sync with chartplotter

The maker does not say

none

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: free to download: chart, weather and position on any phone, and a guided tour and simulation of every tab (manual §38 and §40; store listing); the full app needs a Galvanic Voice aboard
Wearable: Galvanic Pulse bracelet (up to 16 per vessel): IP67 BLE 5.0 wristband with vibration motor, buzzer, LED and one button. Does: man-overboard alert when unheard for longer than the captain-set delay (from 10 s to 10 min, default 60 s) while under way; 'has left the boat' notice at anchor or in harbour; watch-reminder vibration with triple-tap acknowledge; rest and activity detection feeding the fatigue model (§27); can be paired to equipment such as a harness. Battery about 2 months, charges from USB. Limits: bodies, metal bulkheads, engine rooms and aluminium or steel hulls attenuate the BLE signal, so a sleeper lying on the arm can go unheard; every phone and tablet aboard with the Galvanic Sailing app acts as an extra listener for the Galvanic Pulse bracelets (Galvanic Pulse listening, §30). One Galvanic Voice is loud enough to wake the whole boat. People add more for convenience: with a unit close by, an alert can be silenced with a wave of the hand past it, wherever they are aboard. Range in metres not given in the manual. Manual describes no smartwatch app. (manual §23 to §34)
Chart source and cost: OpenSeaMap and Mapbox Satellite included (manual §38); official nautical charts, when offered, will be a paid extra charged per boat

Sources: Galvanic Voice manual v0.642, read it at https://galvanicworks.com/products/: Galvanic Pulse §23 to §34; manual §35 (offline areas incl. Satellite and Meteo; no per-screen licences), §38 layers, §39 encounter animation, §41 optional anchor alarms, §43, §44.7, §44.8, §45.2.3, §49.9, §50.3, §50.4; manual §26 multi-unit

Aqua Map Boatingsubscription · in euros: Expert €14.99, Master €24.99, chart regions from €14.99 (App Store, Germany) · Chart subscription per region, 1 year (App Store US list, USD): US & Canada nautical charts 14.99 and 49.99; US – Nautical & Lakes charts 9.99; Canada 9.99; Bermuda 14.99; Caribbean South 14.99; Bahamas Explorer Charts 49.99; Bahamas Explorer Chartbooks 139.99. Expert: nautical chart cost + USD 14.99/year; Master (USA & Canada only): nautical chart cost + USD 24.99/year (aquamap.app). 14-day free trial

Documented

Works offline aboard
Vector nautical charts
Route planning
Auto-routing
Track recording
Community/POI layers
Anchor zone shown on the chart

Documented, with a limit

Alerts spoken aloud
No subscription
Every phone and tablet, no per-device fee
Live instrument (NMEA) overlay
AIS targets on the chart

Established absent

Alarm sounds from hardware aboard, not the phone
Offline charts, free
Offline satellite map, free

The maker does not say

Raster nautical charts
Sync with chartplotter

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: email, Telegram
Free tier: Basic features free (manual/auto route planning, tracks, tides/currents, anchor alarm, live sharing, ActiveCaptain/Waterway Guide POIs); official charts need a regional chart subscription; 14-day free trial
Wearable: none stated
Chart source and cost: Official charts (NOAA etc.), updated weekly, 1-year subscription per region USD 9.99-139.99 (App Store US)

Sources: [1] [2] [3] [4]

B&G Appfreemium · App Store US in-app purchase list (USD): Annual Subscription 14.99; Annual Subscription 29.99; Annual Subscription 49.99; Region 18.49 / 22.99; North America 22.99; Caribbean 31.99; Atlantic Ocean 54.99 (billing period stated only where named Annual)

Documented

Every phone and tablet, no per-device fee
Vector nautical charts
Route planning
Auto-routing
Community/POI layers
Sync with chartplotter

Documented, with a limit

No subscription
Works offline aboard
Track recording
Offline charts, free
AIS targets on the chart
Anchor zone shown on the chart

Established absent

Alerts spoken aloud
Offline satellite map, free

The maker does not say

Alarm sounds from hardware aboard, not the phone
Raster nautical charts
Live instrument (NMEA) overlay

Free tier: Free C-MAP chart viewer, Autorouting, waypoints, track recording, POIs, marine weather, GPX; Premium adds full GPS, offline downloads, REVEAL, high-res bathymetry, AIS & C-MAP Traffic; 14-day trial (3 days DK/SE)
Wearable: Apple Watch appears in the App Store US supported-devices list; the listing does not describe any watch features or limits
Chart source and cost: C-MAP-powered charts; free viewer; Premium annual subscriptions USD 14.99 / 29.99 / 49.99; region IAPs (App Store US)

Sources: [1] [2] [3]

C-MAP Appfreemium · Premium: Annual subscription USD 14.99 (App Store US in-app purchase list); other listed in-app purchases: Region USD 18.99, North America USD 23.49, Caribbean USD 32.99 (billing period not stated)

Documented

Every phone and tablet, no per-device fee
Vector nautical charts
Route planning
Auto-routing
Track recording
Community/POI layers

Documented, with a limit

No subscription
Works offline aboard
Offline charts, free
AIS targets on the chart

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Live instrument (NMEA) overlay
Offline satellite map, free

The maker does not say

Raster nautical charts
Sync with chartplotter
Anchor zone shown on the chart

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free chart viewer with Autorouting, waypoints, track recording, POIs, marine weather, GPX import/export; Premium adds full GPS, offline downloads, REVEAL relief, high-res bathymetry, AIS & C-MAP Traffic; 14-day trial (3 days DK/SE)
Wearable: none stated
Chart source and cost: C-MAP charts; free viewer, Premium annual subscription USD 14.99; region IAPs USD 18.99-32.99 (App Store US)

Sources: [1] [2] [3]

Garmin ActiveCaptainfreemium · App is free; in-app chart purchases (App Store US e.g. g4 Vision U.S. South $129.99; GN+ U.S. South $149.99; U.S. LakeVü Detail Map $59.99)

Documented

Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee
Vector nautical charts
Raster nautical charts
Route planning
Community/POI layers
Sync with chartplotter

Documented, with a limit

No subscription
Works offline aboard
Auto-routing
Offline charts, free

Established absent

Alerts spoken aloud
Offline satellite map, free

The maker does not say

Live instrument (NMEA) overlay
Track recording
AIS targets on the chart
Anchor zone shown on the chart

Alarm runs on: a device fitted aboard
Free tier: Free app; NOAA raster cartography and premium features downloadable free; Garmin charts bought in-app
Wearable: none stated
Chart source and cost: Garmin Navionics+ / Navionics Vision+ (one-year daily updates included) or legacy BlueChart g3, bought in-app for upload to registered Garmin plotters, e.g. GN+ U.S. South USD 149.99, GNV+ U.S. South USD 249.99 (App Store US); NOAA raster free

Sources: [1] [2]

iNavXfreemium · Chart subscriptions USD 9.99 to 199.99 annually depending on chart/provider (App Store text); AIS Live (AIS NMEA Selective Worldwide Coverage) USD 99.99; Theyr Premium Weather USD 49.99 (trial listed at 39.99); Theyr Premium – Mobile (Monthly) USD 9.99 (App Store US)

Documented

Every phone and tablet, no per-device fee
Works offline aboard
Vector nautical charts
Raster nautical charts
Route planning
Live instrument (NMEA) overlay
Track recording
AIS targets on the chart
Anchor zone shown on the chart

Documented, with a limit

No subscription
Community/POI layers
Offline charts, free

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Offline satellite map, free

The maker does not say

Auto-routing
Sync with chartplotter

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free app with complimentary NOAA RNC US raster charts; premium charts USD 9.99-199.99/year; AIS Live USD 99.99
Wearable: none stated
Chart source and cost: Free NOAA RNC (US); paid subscriptions USD 9.99-199.99/year from iNavX Professional+ (vector), Imray, Explorer Chartbooks, Blue Latitude, Delius Klasing, CHS and others

Sources: [1] [2] [3] [4] [5]

Documented

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Route planning
Track recording
Community/POI layers

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone

The maker does not say

Vector nautical charts
Raster nautical charts
Auto-routing
Live instrument (NMEA) overlay
Sync with chartplotter
Offline charts, free
Offline satellite map, free
AIS targets on the chart
Anchor zone shown on the chart

Alarm runs on: the phone, tablet or computer running the app
Free tier: everything, free

Sources: [1] [2]

Documented

none

Documented, with a limit

No subscription
Route planning

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Alerts spoken aloud
Every phone and tablet, no per-device fee
Works offline aboard
Vector nautical charts
Raster nautical charts
Auto-routing
Live instrument (NMEA) overlay
Track recording
Community/POI layers
Sync with chartplotter
Offline charts, free
Offline satellite map, free
AIS targets on the chart
Anchor zone shown on the chart

Alarm runs on: the phone, tablet or computer running the app
Free tier: free with ads

Sources: [1] [2]

Navionics Boatingsubscription · One-year subscription per chart region, garmin.com en-US store, USD: $49.99 (e.g. U.S. & Canada; UK, Ireland & Holland; Australia & New Zealand; Baltic Sea; China Sea & Japan; Pacific Islands; Africa & Middle East; Indian Ocean & South China; Mexico, Caribbean to Brazil; Chile, Argentina & Easter Island) ; $59.99 (Mediterranean & Black Sea; Central and West Europe; Adriatic & Ionian Sea) ; $99.99 (Scandinavia, South & Germany, North) ; $149.99 (Greenland & Iceland)

Documented

Vector nautical charts
Route planning
Auto-routing
Track recording
Community/POI layers
Sync with chartplotter
AIS targets on the chart

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard
Offline charts, free

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription
Offline satellite map, free

The maker does not say

Raster nautical charts
Live instrument (NMEA) overlay
Anchor zone shown on the chart

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free trial for a limited time; a yearly auto-renewable subscription is needed to keep using charts and advanced features (App Store)
Wearable: none stated
Chart source and cost: Navionics charts, plus NOAA US government charts within the US & Canada and Mexico-Caribbean-Brazil coverages; yearly subscription per region USD 49.99-69.99 (App Store US)

Sources: [1] [2] [3]

NV Chartsfreemium · App free. Charts €49.90 per region per year, auto-renewing, 15 regions; or bundled with a paper chart in a combo pack with a one-year update service.

Documented

Works offline aboard
Vector nautical charts
Raster nautical charts
Route planning
Auto-routing
Track recording
Community/POI layers

Documented, with a limit

No subscription
Live instrument (NMEA) overlay

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Alerts spoken aloud
Every phone and tablet, no per-device fee
Sync with chartplotter
Offline charts, free
Offline satellite map, free
AIS targets on the chart
Anchor zone shown on the chart

Alarm runs on: the phone, tablet or computer running the app
Free tier: app free, charts paid

Sources: [1] [2]

OpenCPNfree (desktop); one-off (Android) · Desktop free; Android USD 9.95 one-off (Google Play US)

Documented

No subscription
Works offline aboard
Vector nautical charts
Raster nautical charts
Route planning
Live instrument (NMEA) overlay
Track recording
Offline charts, free
AIS targets on the chart
Anchor zone shown on the chart

Documented, with a limit

Every phone and tablet, no per-device fee
Auto-routing
Offline satellite map, free

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone

The maker does not say

Community/POI layers
Sync with chartplotter

Alarm runs on: the phone, tablet or computer running the app
Free tier: Desktop free (no paid tier); Android version USD 9.95 one-off
Wearable: none stated
Chart source and cost: S57/S63 vector, BSB v3 raster, CM93 and MBTiles; integrated chart downloader; ENCs for selected regions sold via o-charts.org

Sources: [1] [2] [3] [4] [5]

Documented

Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee
Vector nautical charts
Route planning
Live instrument (NMEA) overlay
Track recording
Community/POI layers
AIS targets on the chart
Anchor zone shown on the chart

Documented, with a limit

No subscription
Works offline aboard
Auto-routing
Sync with chartplotter

Established absent

Alerts spoken aloud
Offline charts, free
Offline satellite map, free

The maker does not say

Raster nautical charts

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: Free: online charts (restricted in AU, SE, DK, DE, TR), POIs, weather 5 days, engine routing 50 NM, AIS via internet, 7-day logbook; instruments, radar, autopilot need an Orca Core
Wearable: Apple Watch app (watchOS 9.0+). The manual says the Core lets you control your autopilot wirelessly from phone, tablet and Apple Watch, so this needs an Orca Core. No other watch functions described.
Chart source and cost: Orca charts: online free; offline and satellite hybrid charts with Orca Plus EUR 49/yr or Smart Navigation EUR 149/yr; charts downloaded while subscribed stay after expiry without updates

Sources: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]

Documented

No subscription
Works offline aboard
Vector nautical charts
Raster nautical charts
Route planning
Auto-routing
Live instrument (NMEA) overlay
Track recording
AIS targets on the chart
Anchor zone shown on the chart

Documented, with a limit

Every phone and tablet, no per-device fee
Offline charts, free

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Offline satellite map, free

The maker does not say

Community/POI layers
Sync with chartplotter

Alarm runs on: the phone, tablet or computer running the app
Free tier: Desktop (Windows, macOS, Linux, Raspberry Pi) free. Mobile free basic version: GRIB viewer, basic charts, simple instruments, anchor alarm, NMEA position input
Wearable: none stated
Chart source and cost: Full version reads user-supplied raster, vector (S57, S63, CM93) and mbtiles charts; Meltemus chart packs sold separately (price not shown)

Sources: [1] [2] [3] [4] [5]

Documented

Every phone and tablet, no per-device fee
Route planning
Track recording
Anchor zone shown on the chart

Documented, with a limit

No subscription
Works offline aboard
AIS targets on the chart

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Live instrument (NMEA) overlay
Offline charts, free
Offline satellite map, free

The maker does not say

Vector nautical charts
Raster nautical charts
Auto-routing
Community/POI layers
Sync with chartplotter

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2]

Documented

Vector nautical charts
Route planning
Auto-routing
Track recording
Community/POI layers
AIS targets on the chart

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard
Live instrument (NMEA) overlay
Sync with chartplotter
Anchor zone shown on the chart

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription
Offline charts, free
Offline satellite map, free

The maker does not say

Raster nautical charts

Alarm runs on: the phone, tablet or computer running the app
Free tier: App Store: 'Try our free version and explore all features before upgrading'. The pricing page lists only paid plans (Essential GBP 59, Explore GBP 95, Elite GBP 99 per year) with a 3-day free trial
Wearable: none stated
Chart source and cost: Savvy Charts (App Store: official hydrographic data), included in every plan, GBP 59-99/year

Sources: [1] [2] [3]

SEAiqsubscription · SEAiq: USD 15/year; SEAiq USA: USD 10/year (seaiq.com); App Store US: Premium Annual USD 15.00; legacy one-time Upgrade for Premium Features USD 49.99

Documented

Alerts spoken aloud
Works offline aboard
Vector nautical charts
Raster nautical charts
Route planning
Track recording
AIS targets on the chart
Anchor zone shown on the chart

Documented, with a limit

Every phone and tablet, no per-device fee
Live instrument (NMEA) overlay
Offline charts, free
Offline satellite map, free

Established absent

Alarm sounds from hardware aboard, not the phone
No subscription

The maker does not say

Auto-routing
Community/POI layers
Sync with chartplotter

Alarm runs on: the phone, tablet or computer running the app
Free tier: No purchase needed to view charts; premium navigation features run for a 7-day evaluation, then need an annual subscription
Wearable: none stated
Chart source and cost: Load your own S-57, S-63, iENC, BSB/KAP charts; free automatic NOAA/USACE chart download for the USA; app subscription USD 15/year (SEAiq USA USD 10/year)

Sources: [1] [2] [3]

Documented

Vector nautical charts
Route planning
Auto-routing

Documented, with a limit

No subscription
Works offline aboard
Track recording

Established absent

Alarm sounds from hardware aboard, not the phone
Raster nautical charts

The maker does not say

Alerts spoken aloud
Every phone and tablet, no per-device fee
Live instrument (NMEA) overlay
Community/POI layers
Sync with chartplotter
Offline charts, free
Offline satellite map, free
AIS targets on the chart
Anchor zone shown on the chart

Alarm runs on: the phone, tablet or computer running the app
Free tier: free tier plus Premium

Sources: [1] [2]

Documented

No subscription
Works offline aboard
Vector nautical charts
Raster nautical charts
Route planning
Live instrument (NMEA) overlay
Track recording
Community/POI layers
Sync with chartplotter
AIS targets on the chart
Anchor zone shown on the chart

Documented, with a limit

Offline charts, free
Offline satellite map, free

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee

The maker does not say

Auto-routing

Alarm runs on: the phone, tablet or computer running the app
Wearable: none stated
Chart source and cost: TZ MAPS (MapMedia catalogue) bought per area

Sources: [1] [2] [3] [4] [5]

TZ iBoatfreemium · in euros: Essential €24.99 a year, Premium €84.99, Elite €334.99; charts a yearly subscription per region, Western Mediterranean €40.99 (mytimezero.com; App Store, Germany) · TZ MAPS chart subscription, yearly (USD, mytimezero.com directory, shown for information only): USA 19.99; Canada West 19.99; Great Lakes 19.99; Bahamas 30.99; Western Mediterranean 40.99; Eastern Mediterranean 61.99; UK, Ireland & the Channel 40.99; Baltic Sea 61.99; Skagerrak & Kattegat 92.99; Iceland, Greenland, Faroe 92.99. Plans monthly or yearly (vendor); App Store US in-app purchase list: Essential Subscription USD 2.99, Premium Subscription USD 9.99, Elite Subscription USD 39.99 (billing period not stated). One-off modules: Radar from USD 49.99, Sounder from USD 24.99

Documented

Alerts spoken aloud
Works offline aboard
Vector nautical charts
Raster nautical charts
Route planning
Track recording
Anchor zone shown on the chart

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Auto-routing
Live instrument (NMEA) overlay
Community/POI layers
Sync with chartplotter
AIS targets on the chart

Established absent

Alarm sounds from hardware aboard, not the phone
Offline charts, free
Offline satellite map, free

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free: overview chart, positioning, 2D/3D views, route planning, Anchor Watch, trip recording, tides/currents, GFS weather, offline weather; 7-day TZ MAPS trial for one region
Wearable: none stated
Chart source and cost: TZ MAPS yearly subscription per region, USD 19.99-92.99; a TZ MAPS area bought on TZ Navigator, TZ Professional or a Furuno MFD gives one year free on TZ iBoat

Sources: [1] [2] [3] [4] [5]

Waterkaartencredit, not a subscription · 7-day free trial, then a non-renewing credit: €15.99 for 31 days, €40.99 for 92 days, €55.99 for 365 days, full access.

Documented

No subscription
Works offline aboard
Vector nautical charts
Route planning
Track recording
Community/POI layers

Established absent

none

The maker does not say

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee
Raster nautical charts
Auto-routing
Live instrument (NMEA) overlay
Sync with chartplotter
Offline charts, free
Offline satellite map, free
AIS targets on the chart
Anchor zone shown on the chart

Free tier: 7-day trial

Sources: [1] [2]

Wärtsilä iSailorfreemium · Chart folios as in-app purchases (App Store US, e.g. USA regional folios USD 4.99; Caribbean Sea Lesser Antilles USD 10.99); chart correction service annual auto-renewable subscription (price not stated); AIS Receiver Support USD 11.99; Tides & Currents subscription USD 11.99

Documented

Works offline aboard
Vector nautical charts
Route planning
Track recording

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Live instrument (NMEA) overlay
Community/POI layers
AIS targets on the chart

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Offline charts, free
Offline satellite map, free

The maker does not say

Raster nautical charts
Auto-routing
Sync with chartplotter
Anchor zone shown on the chart

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free download; chart folios and options bought in-app
Wearable: Apple Watch appears in the App Store US supported-devices list; the listing does not describe watch features or limits
Chart source and cost: Wärtsilä TX-97 vector chart folios as in-app purchases (e.g. USA regional USD 4.99, Lesser Antilles USD 10.99); annual chart-correction subscription; purchased folios stay available

Sources: [1]

Category

AIS & traffic

On a phone the comparison grid is replaced by the verdicts below, one per app, which carry the same marks in words. The grid is there on a wider screen.

The specialists that document the most of this table: Boat Beacon, OpenCPN and TIMEZERO TZ Navigator. What the Galvanic Sailing app documents that the others mostly do not: Alarm sounds from hardware aboard, not the phone (documented, fully or in part, by 1 of 21 others); Collision alarm works in background (documented, fully or in part, by 2 of 21 others); Alarm sounds through silent and Do Not Disturb (documented, fully or in part, by 1 of 21 others).

21 apps compared with ours on 14 features.

App	Alerts spoken aloud	Alarm sounds from hardware aboard, not the phone	No subscription	Every phone and tablet, no per-device fee	Works offline aboard	AIS target display	Closest-approach (CPA/TCPA) alarm	Internet AIS	Onboard AIS receiver support	Audible collision warning	Collision alarm works in background	AIS SART / MOB beacon display	Alarm sounds through silent and Do Not Disturb	Encounter/collision visualisation	Price, as published
Galvanic Sailing appGalvanic Works S.L. · Android 7.0+ on Google Play; iOS 15.5+ on the App Store; phones and tablets	✔	✔	✔	✔	✔	✔	✔	✘	✔	✔	✔	✘	✔	✔	free to download; the full app with a Galvanic Voice aboard · Galvanic Voice €1,149.50 incl. 21% Spanish VAT (€950 ex-VAT) · chart, weather and position free on any phone, and a guided tour and simulation of every tab; no subscription; official nautical charts, when offered, will be a paid extra charged per boat
AIS ExplorerPredictWind Limited · iOS, Android	✘	?	~	~	✘	✔	✘	✔	✘	✘	✘	?	?	✘	subscription · AIS Pro monthly USD 49.00; AIS Pro 3 monthly USD 99.00; AIS Pro Annual USD 249.00 (App Store US)
Aqua Map BoatingGEC s.r.l. · iOS; iPadOS; macOS (Apple silicon)	~	✘	~	~	✔	~	~	?	~	~	?	?	?	~	subscription · in euros: Expert €14.99, Master €24.99, chart regions from €14.99 (App Store, Germany) · Chart subscription per region, 1 year (App Store US list, USD): US & Canada nautical charts 14.99 and 49.99; US – Nautical & Lakes charts 9.99; Canada 9.99; Bermuda 14.99; Caribbean South 14.99; Bahamas Explorer Charts 49.99; Bahamas Explorer Chartbooks 139.99. Expert: nautical chart cost + USD 14.99/year; Master (USA & Canada only): nautical chart cost + USD 24.99/year (aquamap.app). 14-day free trial
Boat BeaconPocket Mariner Ltd. · iOS; iPadOS; watchOS; macOS (Apple silicon); Android	✘	✘	✔	~	~	✔	✔	✔	✔	✔	✔	✔	✔	✔	one-off + optional subscription · in euros: €17.99, Anchor Watch and Man Overboard €5.99 (App Store, Germany) · App USD 14.99 one-off (App Store US); AIS Sharing subscription USD 5.99 monthly or USD 16.49 yearly; add-ons: Live View Upgrade USD 7.99, Anchor Watch and Man Overboard USD 4.99, NOAA US Marine Charts USD 9.99, UK & IE Marine Charts USD 12.99
C-MAP AppNavico Norway AS (C-MAP) · iOS, Android, PC (App Store text: available on Mobile, Tablet or PC)	✘	✘	~	✔	~	~	✘	✔	✘	✘	✘	?	?	✘	freemium · Premium: Annual subscription USD 14.99 (App Store US in-app purchase list); other listed in-app purchases: Region USD 18.99, North America USD 23.49, Caribbean USD 32.99 (billing period not stated)
iNavXNavX Studios LLC · iOS, Android	✘	✘	~	✔	✔	✔	✔	~	✔	?	?	~	?	?	freemium · Chart subscriptions USD 9.99 to 199.99 annually depending on chart/provider (App Store text); AIS Live (AIS NMEA Selective Worldwide Coverage) USD 99.99; Theyr Premium Weather USD 49.99 (trial listed at 39.99); Theyr Premium – Mobile (Monthly) USD 9.99 (App Store US)
MarineTrafficMarineTraffic Applications Ltd · iOS, Android	✘	?	~	?	✘	✔	✘	✔	✘	✘	✘	?	?	✘	freemium · Mobile Pro Plan: App Store US in-app purchase list USD 29.99 and USD 4.99 (billing period not stated); 7-day free trial for first-time users (support site). Other IAPs: Access Plus 24 USD 0.99, Augmented Reality USD 2.99, Route Planner USD 0.99
moodSailorSociété Française d'Infonuagique (France) · iOS 15.0+; Android	✘	✘	✔	✔	✔	✔	✔	✔	?	?	?	?	?	?	free · No price published anywhere, in any currency. Free on both stores, no in-app purchase, no subscription, no pro tier, no ads. Maker: "The whole app, all of its features, for free." AIS arrives free over community networks (aisstream.io, pelyr.com).
Navionics BoatingGarmin International · iOS; Android	✘	✘	✘	~	~	✔	~	?	✔	✔	~	?	?	✔	subscription · One-year subscription per chart region, garmin.com en-US store, USD: $49.99 (e.g. U.S. & Canada; UK, Ireland & Holland; Australia & New Zealand; Baltic Sea; China Sea & Japan; Pacific Islands; Africa & Middle East; Indian Ocean & South China; Mexico, Caribbean to Brazil; Chile, Argentina & Easter Island) ; $59.99 (Mediterranean & Black Sea; Central and West Europe; Adriatic & Ionian Sea) ; $99.99 (Scandinavia, South & Germany, North) ; $149.99 (Greenland & Iceland)
NavLink HDDigital Yacht Ltd · iOS (also Apple silicon Mac)	✘	✘	~	~	✔	✔	✔	~	✔	?	?	?	?	✔	freemium · App free; in-app purchases are 1-year subscriptions (App Store US, USD): US & Great Lakes 19.99; Pro Features 16.49; Canadian Charts 30.99; Weather charts 8.49; German Charts 16.99; French Charts 22.99; Spanish Charts 24.99; NL & BE Charts 17.99; Danish Charts 36.99; Portuguese charts 19.99
NV ChartsNV Chart Group GmbH (Eckernförde, Germany) · iOS; Android; Windows 11/10/8; macOS 10.13+; browser web app at app.nvcharts.com	?	✘	~	?	✔	✔	✔	?	✔	?	?	✔	?	?	freemium · App free. Charts €49.90 per region per year, auto-renewing, 15 regions; or bundled with a paper chart in a combo pack with a one-year update service.
OpenCPNOpenCPN project (Android: Dave Register) · Windows; macOS; Linux; Raspberry Pi; Android	✘	✘	✔	~	✔	✔	✔	?	✔	✔	?	✔	?	✔	free (desktop); one-off (Android) · Desktop free; Android USD 9.95 one-off (Google Play US)
OrcaOrca Technologies AS · iOS; iPadOS; watchOS; macOS (Apple M1 or later); Android; Orca Display	✘	✔	~	✔	~	✔	✘	✔	✔	✘	✘	?	?	~	subscription · Orca Core 2 EUR 649; Orca Display 2 EUR 999; Charging Mount EUR 349 (getorca.com configurator, delivery to Europe) · Orca Plus EUR 49/year; Orca Smart Navigation EUR 149/year (help centre); App Store US in-app purchase list: Orca Plus USD 44.99, Orca Smart Navigation USD 159.99 and USD 89.99, Orca Subscription USD 129.00 (billing period not stated)
Salt & Wire CompanionMaciej Jan Karnowski, trading as Salt & Wire (Poland) · Android 7.0+ only; iOS in preparation, no date	✘	✘	✘	✔	✔	✔	✘	?	~	✘	✘	?	?	✔	freemium · PLUS subscription, Google Play, three-day trial; no labelled price published. Google's in-app purchase range for the listing is EUR 9.49 to EUR 28.99, not confirmed as the PLUS price
Savvy NavvySavvy Navvy ltd · iOS; iPadOS; Android	✘	✘	✘	~	~	✔	✘	✔	~	✘	✘	?	✘	✘	subscription · in euros: Elite €119 a year without the Denmark and Italy charts, €139 to €169 with them (App Store, Germany) · Essential GBP 59 per year; Explore GBP 95 per year; Elite GBP 99 per year (savvy-navvy.com pricing, 3-day free trial); App Store US in-app purchase list: Premium USD 99.00, Premium (US-only charts) USD 129.00, Premium Plus (global charts) USD 169.00 (billing period not stated)
SEAiqSakhalin, LLC · iOS (iPhone, iPad)	✔	✘	✘	~	✔	✔	✘	?	✔	?	?	?	✘	✔	subscription · SEAiq: USD 15/year; SEAiq USA: USD 10/year (seaiq.com); App Store US: Premium Annual USD 15.00; legacy one-time Upgrade for Premium Features USD 49.99
Ship Finderpinkfroot limited · iOS	✘	?	✔	✔	✘	✔	✘	✔	✘	✘	✘	?	?	✘	one-off · Ship Finder USD 4.99 one-off (App Store US); Ship Finder Lite free
Simrad: Companion for BoatersNavico Norway AS · iOS; Android. English only on iOS.	?	✘	~	?	?	~	✘	~	✘	✘	?	?	?	?	freemium · Free tier plus a Premium subscription with a 14-day free trial (3-day in Denmark and Sweden). Navico publishes no price on any of its own pages; the figure exists only inside the app stores.
TIMEZERO TZ NavigatorMaxSeaNaval · Windows PC (TZ iBoat is the iPhone/iPad companion)	✘	✘	✔	✘	✔	✔	✔	✔	✔	✔	?	?	?	✔	TZ Navigator (store item 'TimeZero Rec'): €503 / $420 / £429; upgrade from older version €188 / $158 / £167; Weather Routing module €387 / $315 / £335; Furuno Radar or Sounder module €525 each. Licence type not stated in the store.
TZ iBoatTIMEZERO (App Store seller: Nobeltec, Inc.) · iOS, Android	✔	✘	✘	~	✔	~	~	~	~	~	✘	?	?	~	freemium · in euros: Essential €24.99 a year, Premium €84.99, Elite €334.99; charts a yearly subscription per region, Western Mediterranean €40.99 (mytimezero.com; App Store, Germany) · TZ MAPS chart subscription, yearly (USD, mytimezero.com directory, shown for information only): USA 19.99; Canada West 19.99; Great Lakes 19.99; Bahamas 30.99; Western Mediterranean 40.99; Eastern Mediterranean 61.99; UK, Ireland & the Channel 40.99; Baltic Sea 61.99; Skagerrak & Kattegat 92.99; Iceland, Greenland, Faroe 92.99. Plans monthly or yearly (vendor); App Store US in-app purchase list: Essential Subscription USD 2.99, Premium Subscription USD 9.99, Elite Subscription USD 39.99 (billing period not stated). One-off modules: Radar from USD 49.99, Sounder from USD 24.99
VesselFinderAstra Paging Ltd · iOS, Android, web	✘	?	~	✔	✘	✔	✘	✔	✘	✘	✘	?	?	✘	freemium · Web plans (EUR, excl. VAT, no auto-renew): Satellite EUR 119/1 month, EUR 1199/1 year; Premium EUR 29/1 month, EUR 149/1 year; Basic EUR 3/1 month, EUR 9/1 year; Free
Waterkaartenbiggerworks bv (Amsterdam, Netherlands), formerly branded ANWB Waterkaarten · iOS; Android; free Windows version. One account on three devices.	?	?	✔	?	✔	✔	?	✔	✔	?	?	?	?	?	credit, not a subscription · 7-day free trial, then a non-renewing credit: €15.99 for 31 days, €40.99 for 92 days, €55.99 for 365 days, full access.

The verdicts, one by one (22)

Documented

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription
Every phone and tablet, no per-device fee
Works offline aboard
AIS target display
Closest-approach (CPA/TCPA) alarm
Onboard AIS receiver support
Audible collision warning
Collision alarm works in background
Alarm sounds through silent and Do Not Disturb
Encounter/collision visualisation

Established absent

Internet AIS
AIS SART / MOB beacon display

The maker does not say

none

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: free to download: chart, weather and position on any phone, and a guided tour and simulation of every tab (manual §38 and §40; store listing); the full app needs a Galvanic Voice aboard
Wearable: Galvanic Pulse bracelet (up to 16 per vessel): IP67 BLE 5.0 wristband with vibration motor, buzzer, LED and one button. Does: man-overboard alert when unheard for longer than the captain-set delay (from 10 s to 10 min, default 60 s) while under way; 'has left the boat' notice at anchor or in harbour; watch-reminder vibration with triple-tap acknowledge; rest and activity detection feeding the fatigue model (§27); can be paired to equipment such as a harness. Battery about 2 months, charges from USB. Limits: bodies, metal bulkheads, engine rooms and aluminium or steel hulls attenuate the BLE signal, so a sleeper lying on the arm can go unheard; every phone and tablet aboard with the Galvanic Sailing app acts as an extra listener for the Galvanic Pulse bracelets (Galvanic Pulse listening, §30). One Galvanic Voice is loud enough to wake the whole boat. People add more for convenience: with a unit close by, an alert can be silenced with a wave of the hand past it, wherever they are aboard. Range in metres not given in the manual. Manual describes no smartwatch app. (manual §23 to §34)

AIS Explorersubscription · AIS Pro monthly USD 49.00; AIS Pro 3 monthly USD 99.00; AIS Pro Annual USD 249.00 (App Store US)

Documented

AIS target display
Internet AIS

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee

Established absent

Alerts spoken aloud
Works offline aboard
Closest-approach (CPA/TCPA) alarm
Onboard AIS receiver support
Audible collision warning
Collision alarm works in background
Encounter/collision visualisation

The maker does not say

Alarm sounds from hardware aboard, not the phone
AIS SART / MOB beacon display
Alarm sounds through silent and Do Not Disturb

Free tier: Free version shows all AIS vessels; Pro unlocks search, filter, favourites and satellite AIS (USD 50/month, 99/3 months, 249/year on aisexplorerapp.com)
Wearable: none stated

Sources: [1] [2] [3] [4]

Documented

Works offline aboard

Documented, with a limit

Alerts spoken aloud
No subscription
Every phone and tablet, no per-device fee
AIS target display
Closest-approach (CPA/TCPA) alarm
Onboard AIS receiver support
Audible collision warning
Encounter/collision visualisation

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Internet AIS
Collision alarm works in background
AIS SART / MOB beacon display
Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: email, Telegram
Free tier: Basic features free (manual/auto route planning, tracks, tides/currents, anchor alarm, live sharing, ActiveCaptain/Waterway Guide POIs); official charts need a regional chart subscription; 14-day free trial
Wearable: none stated

Sources: [1] [2] [3] [4]

Boat Beaconone-off + optional subscription · in euros: €17.99, Anchor Watch and Man Overboard €5.99 (App Store, Germany) · App USD 14.99 one-off (App Store US); AIS Sharing subscription USD 5.99 monthly or USD 16.49 yearly; add-ons: Live View Upgrade USD 7.99, Anchor Watch and Man Overboard USD 4.99, NOAA US Marine Charts USD 9.99, UK & IE Marine Charts USD 12.99

Documented

No subscription
AIS target display
Closest-approach (CPA/TCPA) alarm
Internet AIS
Onboard AIS receiver support
Audible collision warning
Collision alarm works in background
AIS SART / MOB beacon display
Alarm sounds through silent and Do Not Disturb
Encounter/collision visualisation

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app
Free tier: no free tier
Wearable: Apple Watch app (iOS), free: 'AIS collision detection, man overboard alerts and navigation tools that run directly on the Apple Watch'; compass, SOG, COG, HDG, AIS, MOB, countdown timer, torch (pocketmariner.com). Limits not stated. No Android watch app stated.

Sources: [1] [2] [3] [4]

Documented

Every phone and tablet, no per-device fee
Internet AIS

Documented, with a limit

No subscription
Works offline aboard
AIS target display

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Closest-approach (CPA/TCPA) alarm
Onboard AIS receiver support
Audible collision warning
Collision alarm works in background
Encounter/collision visualisation

The maker does not say

AIS SART / MOB beacon display
Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free chart viewer with Autorouting, waypoints, track recording, POIs, marine weather, GPX import/export; Premium adds full GPS, offline downloads, REVEAL relief, high-res bathymetry, AIS & C-MAP Traffic; 14-day trial (3 days DK/SE)
Wearable: none stated

Sources: [1] [2] [3]

Documented

Every phone and tablet, no per-device fee
Works offline aboard
AIS target display
Closest-approach (CPA/TCPA) alarm
Onboard AIS receiver support

Documented, with a limit

No subscription
Internet AIS
AIS SART / MOB beacon display

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone

The maker does not say

Audible collision warning
Collision alarm works in background
Alarm sounds through silent and Do Not Disturb
Encounter/collision visualisation

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free app with complimentary NOAA RNC US raster charts; premium charts USD 9.99-199.99/year; AIS Live USD 99.99
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

MarineTrafficfreemium · Mobile Pro Plan: App Store US in-app purchase list USD 29.99 and USD 4.99 (billing period not stated); 7-day free trial for first-time users (support site). Other IAPs: Access Plus 24 USD 0.99, Augmented Reality USD 2.99, Route Planner USD 0.99

Documented

AIS target display
Internet AIS

Documented, with a limit

No subscription

Established absent

Alerts spoken aloud
Works offline aboard
Closest-approach (CPA/TCPA) alarm
Onboard AIS receiver support
Audible collision warning
Collision alarm works in background
Encounter/collision visualisation

The maker does not say

Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee
AIS SART / MOB beacon display
Alarm sounds through silent and Do Not Disturb

Free tier: Free: map and vessel search with terrestrial and roaming AIS only; Mobile Pro adds satellite AIS, fleets up to 20, weather, nautical maps; 7-day trial for first-time users
Wearable: none stated

Sources: [1] [2]

Documented

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
AIS target display
Closest-approach (CPA/TCPA) alarm
Internet AIS

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone

The maker does not say

Onboard AIS receiver support
Audible collision warning
Collision alarm works in background
AIS SART / MOB beacon display
Alarm sounds through silent and Do Not Disturb
Encounter/collision visualisation

Alarm runs on: the phone, tablet or computer running the app
Free tier: everything, free

Sources: [1] [2]

Documented

AIS target display
Onboard AIS receiver support
Audible collision warning
Encounter/collision visualisation

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard
Closest-approach (CPA/TCPA) alarm
Collision alarm works in background

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription

The maker does not say

Internet AIS
AIS SART / MOB beacon display
Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free trial for a limited time; a yearly auto-renewable subscription is needed to keep using charts and advanced features (App Store)
Wearable: none stated

Sources: [1] [2] [3]

NavLink HDfreemium · App free; in-app purchases are 1-year subscriptions (App Store US, USD): US & Great Lakes 19.99; Pro Features 16.49; Canadian Charts 30.99; Weather charts 8.49; German Charts 16.99; French Charts 22.99; Spanish Charts 24.99; NL & BE Charts 17.99; Danish Charts 36.99; Portuguese charts 19.99

Documented

Works offline aboard
AIS target display
Closest-approach (CPA/TCPA) alarm
Onboard AIS receiver support
Encounter/collision visualisation

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Internet AIS

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone

The maker does not say

Audible collision warning
Collision alarm works in background
AIS SART / MOB beacon display
Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free: GPS position, live AIS overlay with CPA/TCPA alarms (needs a Digital Yacht wireless device), wind gauges, routes, weather buoys, POIs; charts and NavLink Pro by yearly subscription
Wearable: none stated

Sources: [1] [2]

NV Chartsfreemium · App free. Charts €49.90 per region per year, auto-renewing, 15 regions; or bundled with a paper chart in a combo pack with a one-year update service.

Documented

Works offline aboard
AIS target display
Closest-approach (CPA/TCPA) alarm
Onboard AIS receiver support
AIS SART / MOB beacon display

Documented, with a limit

No subscription

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Alerts spoken aloud
Every phone and tablet, no per-device fee
Internet AIS
Audible collision warning
Collision alarm works in background
Alarm sounds through silent and Do Not Disturb
Encounter/collision visualisation

Alarm runs on: the phone, tablet or computer running the app
Free tier: app free, charts paid

Sources: [1] [2]

OpenCPNfree (desktop); one-off (Android) · Desktop free; Android USD 9.95 one-off (Google Play US)

Documented

No subscription
Works offline aboard
AIS target display
Closest-approach (CPA/TCPA) alarm
Onboard AIS receiver support
Audible collision warning
AIS SART / MOB beacon display
Encounter/collision visualisation

Documented, with a limit

Every phone and tablet, no per-device fee

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone

The maker does not say

Internet AIS
Collision alarm works in background
Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app
Free tier: Desktop free (no paid tier); Android version USD 9.95 one-off
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6]

Documented

Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee
AIS target display
Internet AIS
Onboard AIS receiver support

Documented, with a limit

No subscription
Works offline aboard
Encounter/collision visualisation

Established absent

Alerts spoken aloud
Closest-approach (CPA/TCPA) alarm
Audible collision warning
Collision alarm works in background

The maker does not say

AIS SART / MOB beacon display
Alarm sounds through silent and Do Not Disturb

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: Free: online charts (restricted in AU, SE, DK, DE, TR), POIs, weather 5 days, engine routing 50 NM, AIS via internet, 7-day logbook; instruments, radar, autopilot need an Orca Core
Wearable: Apple Watch app (watchOS 9.0+). The manual says the Core lets you control your autopilot wirelessly from phone, tablet and Apple Watch, so this needs an Orca Core. No other watch functions described.

Sources: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]

Documented

Every phone and tablet, no per-device fee
Works offline aboard
AIS target display
Encounter/collision visualisation

Documented, with a limit

Onboard AIS receiver support

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription
Closest-approach (CPA/TCPA) alarm
Audible collision warning
Collision alarm works in background

The maker does not say

Internet AIS
AIS SART / MOB beacon display
Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2]

Documented

AIS target display
Internet AIS

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard
Onboard AIS receiver support

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription
Closest-approach (CPA/TCPA) alarm
Audible collision warning
Collision alarm works in background
Alarm sounds through silent and Do Not Disturb
Encounter/collision visualisation

The maker does not say

AIS SART / MOB beacon display

Alarm runs on: the phone, tablet or computer running the app
Free tier: App Store: 'Try our free version and explore all features before upgrading'. The pricing page lists only paid plans (Essential GBP 59, Explore GBP 95, Elite GBP 99 per year) with a 3-day free trial
Wearable: none stated

Sources: [1] [2] [3] [4]

SEAiqsubscription · SEAiq: USD 15/year; SEAiq USA: USD 10/year (seaiq.com); App Store US: Premium Annual USD 15.00; legacy one-time Upgrade for Premium Features USD 49.99

Documented

Alerts spoken aloud
Works offline aboard
AIS target display
Onboard AIS receiver support
Encounter/collision visualisation

Documented, with a limit

Every phone and tablet, no per-device fee

Established absent

Alarm sounds from hardware aboard, not the phone
No subscription
Closest-approach (CPA/TCPA) alarm
Alarm sounds through silent and Do Not Disturb

The maker does not say

Internet AIS
Audible collision warning
Collision alarm works in background
AIS SART / MOB beacon display

Alarm runs on: the phone, tablet or computer running the app
Free tier: No purchase needed to view charts; premium navigation features run for a 7-day evaluation, then need an annual subscription
Wearable: none stated

Sources: [1] [2] [3] [4]

Ship Finderone-off · Ship Finder USD 4.99 one-off (App Store US); Ship Finder Lite free

Documented

No subscription
Every phone and tablet, no per-device fee
AIS target display
Internet AIS

Established absent

Alerts spoken aloud
Works offline aboard
Closest-approach (CPA/TCPA) alarm
Onboard AIS receiver support
Audible collision warning
Collision alarm works in background
Encounter/collision visualisation

The maker does not say

Alarm sounds from hardware aboard, not the phone
AIS SART / MOB beacon display
Alarm sounds through silent and Do Not Disturb

Free tier: Ship Finder Lite is a separate free app; Ship Finder USD 4.99
Wearable: none stated

Sources: [1]

Documented

none

Documented, with a limit

No subscription
AIS target display
Internet AIS

Established absent

Alarm sounds from hardware aboard, not the phone
Closest-approach (CPA/TCPA) alarm
Onboard AIS receiver support
Audible collision warning

The maker does not say

Alerts spoken aloud
Every phone and tablet, no per-device fee
Works offline aboard
Collision alarm works in background
AIS SART / MOB beacon display
Alarm sounds through silent and Do Not Disturb
Encounter/collision visualisation

Alarm runs on: the phone, tablet or computer running the app
Free tier: free tier plus Premium

Sources: [1] [2]

Documented

No subscription
Works offline aboard
AIS target display
Closest-approach (CPA/TCPA) alarm
Internet AIS
Onboard AIS receiver support
Audible collision warning
Encounter/collision visualisation

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee

The maker does not say

Collision alarm works in background
AIS SART / MOB beacon display
Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app
Wearable: none stated

Sources: [1] [2] [3]

Documented

Alerts spoken aloud
Works offline aboard

Documented, with a limit

Every phone and tablet, no per-device fee
AIS target display
Closest-approach (CPA/TCPA) alarm
Internet AIS
Onboard AIS receiver support
Audible collision warning
Encounter/collision visualisation

Established absent

Alarm sounds from hardware aboard, not the phone
No subscription
Collision alarm works in background

The maker does not say

AIS SART / MOB beacon display
Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free: overview chart, positioning, 2D/3D views, route planning, Anchor Watch, trip recording, tides/currents, GFS weather, offline weather; 7-day TZ MAPS trial for one region
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

VesselFinderfreemium · Web plans (EUR, excl. VAT, no auto-renew): Satellite EUR 119/1 month, EUR 1199/1 year; Premium EUR 29/1 month, EUR 149/1 year; Basic EUR 3/1 month, EUR 9/1 year; Free

Documented

Every phone and tablet, no per-device fee
AIS target display
Internet AIS

Documented, with a limit

No subscription

Established absent

Alerts spoken aloud
Works offline aboard
Closest-approach (CPA/TCPA) alarm
Onboard AIS receiver support
Audible collision warning
Collision alarm works in background
Encounter/collision visualisation

The maker does not say

Alarm sounds from hardware aboard, not the phone
AIS SART / MOB beacon display
Alarm sounds through silent and Do Not Disturb

Free tier: Free mobile app with terrestrial AIS coverage; extended real-time satellite and roaming coverage needs a subscription
Wearable: none stated

Sources: [1] [2] [3]

Waterkaartencredit, not a subscription · 7-day free trial, then a non-renewing credit: €15.99 for 31 days, €40.99 for 92 days, €55.99 for 365 days, full access.

Documented

No subscription
Works offline aboard
AIS target display
Internet AIS
Onboard AIS receiver support

Established absent

none

The maker does not say

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee
Closest-approach (CPA/TCPA) alarm
Audible collision warning
Collision alarm works in background
AIS SART / MOB beacon display
Alarm sounds through silent and Do Not Disturb
Encounter/collision visualisation

Free tier: 7-day trial

Sources: [1] [2]

Category

Instrument displays

On a phone the comparison grid is replaced by the verdicts below, one per app, which carry the same marks in words. The grid is there on a wider screen.

The specialists that document the most of this table: WilhelmSK, NMEAremote and OpenCPN.

10 apps compared with ours on 11 features.

App	Alerts spoken aloud	Alarm sounds from hardware aboard, not the phone	No subscription	Every phone and tablet, no per-device fee	Works offline aboard	NMEA 0183	Signal K	Configurable dashboard	Alarms on instrument values	Multi-engine display	Old readings flagged as stale	Price, as published
Galvanic Sailing appGalvanic Works S.L. · Android 7.0+ on Google Play; iOS 15.5+ on the App Store; phones and tablets	✔	✔	✔	✔	✔	✘	✘	✔	✔	✔	✔	free to download; the full app with a Galvanic Voice aboard · Galvanic Voice €1,149.50 incl. 21% Spanish VAT (€950 ex-VAT) · chart, weather and position free on any phone, and a guided tour and simulation of every tab; no subscription; official nautical charts, when offered, will be a paid extra charged per boat
iRegattaZifigo (iOS); Madman Marine Pty Ltd (Android) · iOS (iPhone, iPad, Apple Watch), Android	~	✘	✔	?	~	~	?	~	✘	✘	~	one-off (in-app purchases) · iOS iRegatta free evaluation + IAPs: Basic USD 9.99, NMEA USD 5.99, AIS USD 3.99, Apple Watch integration USD 2.99, Race Analysis USD 3.99, Sailplan USD 1.99; iRegatta Pro (iOS) USD 19.99 one-off incl. Basic, NMEA and AIS (App Store US); iRegatta Pro (Android) USD 18.99 (Google Play US)
KIP (Signal K instrument panel)KIP open-source project (mxtommy) · web (any modern browser: phone, tablet, PC, Raspberry Pi)	✘	✔	✔	✔	✔	?	✔	✔	~	?	?	free app · Free, MIT licence
Maretron N2KViewMaretron, now under Raymarine / Teledyne FLIR (store listings name Raymarine UK Limited; maretron.com still carries the Maretron brand, Jupiter, Florida) · PC; Mac; Maretron MBB300C, TSM800/800C/810C/1330/1330C; iPhone; iPad; Android	✘	✔	?	?	✔	✘	✘	~	✔	?	?	app free; gateway, licences and modules sold through dealers · Maretron's product pages show no prices and sell licence keys 'via our dealer network'; its own 2023 US list price PDF (maretron.com, Maretron Brand Price List 7.1.23) gives the IPG100 gateway at $709 and N2KView for a PC at $695, and N2KView Mobile is free.
NMEA DashboardSankeysoft · Android	✘	✘	✔	✔	✔	✔	?	✔	✔	✘	✔	free app · Free (Google Play US: Install); open source, MIT licence
NMEAremotezapfware · iOS (iPhone, iPad, Apple Watch)	~	✘	✔	~	✔	✔	✔	✔	✔	✔	✔	one-off · in euros: €24.99 (App Store, Germany) · USD 23.99 one-off, no subscriptions (App Store US); NMEAremote LITE USD 3.99
NV ChartsNV Chart Group GmbH (Eckernförde, Germany) · iOS; Android; Windows 11/10/8; macOS 10.13+; browser web app at app.nvcharts.com	?	✘	~	?	✔	✔	?	~	?	?	?	freemium · App free. Charts €49.90 per region per year, auto-renewing, 15 regions; or bundled with a paper chart in a combo pack with a one-year update service.
OpenCPNOpenCPN project (Android: Dave Register) · Windows; macOS; Linux; Raspberry Pi; Android	✘	✘	✔	~	✔	✔	✔	✔	~	✔	✔	free (desktop); one-off (Android) · Desktop free; Android USD 9.95 one-off (Google Play US)
OrcaOrca Technologies AS · iOS; iPadOS; watchOS; macOS (Apple M1 or later); Android; Orca Display	✘	✔	✔	✔	~	?	?	✔	✘	✔	?	subscription · Orca Core 2 EUR 649; Orca Display 2 EUR 999; Charging Mount EUR 349 (getorca.com configurator, delivery to Europe) · Orca Plus EUR 49/year; Orca Smart Navigation EUR 149/year (help centre); App Store US in-app purchase list: Orca Plus USD 44.99, Orca Smart Navigation USD 159.99 and USD 89.99, Orca Subscription USD 129.00 (billing period not stated)
TZ iBoatTIMEZERO (App Store seller: Nobeltec, Inc.) · iOS, Android	✔	✘	✘	~	✔	~	?	✔	~	✘	✔	freemium · in euros: Essential €24.99 a year, Premium €84.99, Elite €334.99; charts a yearly subscription per region, Western Mediterranean €40.99 (mytimezero.com; App Store, Germany) · TZ MAPS chart subscription, yearly (USD, mytimezero.com directory, shown for information only): USA 19.99; Canada West 19.99; Great Lakes 19.99; Bahamas 30.99; Western Mediterranean 40.99; Eastern Mediterranean 61.99; UK, Ireland & the Channel 40.99; Baltic Sea 61.99; Skagerrak & Kattegat 92.99; Iceland, Greenland, Faroe 92.99. Plans monthly or yearly (vendor); App Store US in-app purchase list: Essential Subscription USD 2.99, Premium Subscription USD 9.99, Elite Subscription USD 39.99 (billing period not stated). One-off modules: Radar from USD 49.99, Sounder from USD 24.99
WilhelmSKScott Bender · iOS, iPadOS, Apple Watch, Apple TV, macOS	✘	✔	✔	~	✔	✔	✔	✔	✔	✔	✔	one-off · iOS USD 19.99 one-off; macOS USD 19.99 (App Store US)

The verdicts, one by one (11)

Documented

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Configurable dashboard
Alarms on instrument values
Multi-engine display
Old readings flagged as stale

Established absent

NMEA 0183
Signal K

The maker does not say

none

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: free to download: chart, weather and position on any phone, and a guided tour and simulation of every tab (manual §38 and §40; store listing); the full app needs a Galvanic Voice aboard
Wearable: Galvanic Pulse bracelet (up to 16 per vessel): IP67 BLE 5.0 wristband with vibration motor, buzzer, LED and one button. Does: man-overboard alert when unheard for longer than the captain-set delay (from 10 s to 10 min, default 60 s) while under way; 'has left the boat' notice at anchor or in harbour; watch-reminder vibration with triple-tap acknowledge; rest and activity detection feeding the fatigue model (§27); can be paired to equipment such as a harness. Battery about 2 months, charges from USB. Limits: bodies, metal bulkheads, engine rooms and aluminium or steel hulls attenuate the BLE signal, so a sleeper lying on the arm can go unheard; every phone and tablet aboard with the Galvanic Sailing app acts as an extra listener for the Galvanic Pulse bracelets (Galvanic Pulse listening, §30). One Galvanic Voice is loud enough to wake the whole boat. People add more for convenience: with a unit close by, an alert can be silenced with a wave of the hand past it, wherever they are aboard. Range in metres not given in the manual. Manual describes no smartwatch app. (manual §23 to §34)

iRegattaone-off (in-app purchases) · iOS iRegatta free evaluation + IAPs: Basic USD 9.99, NMEA USD 5.99, AIS USD 3.99, Apple Watch integration USD 2.99, Race Analysis USD 3.99, Sailplan USD 1.99; iRegatta Pro (iOS) USD 19.99 one-off incl. Basic, NMEA and AIS (App Store US); iRegatta Pro (Android) USD 18.99 (Google Play US)

Documented

No subscription

Documented, with a limit

Alerts spoken aloud
Works offline aboard
NMEA 0183
Configurable dashboard
Old readings flagged as stale

Established absent

Alarm sounds from hardware aboard, not the phone
Alarms on instrument values
Multi-engine display

The maker does not say

Every phone and tablet, no per-device fee
Signal K

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free evaluation version: all features, but GPS and NMEA input shut down after 4 minutes; features bought as IAPs (Android: 4 minutes of testing at each startup)
Wearable: Apple Watch app: view data, operate the start-line features, and log sailing as a HealthKit activity. The free iOS version sells Apple Watch integration as a USD 2.99 IAP. Limits not stated. No Android watch app stated.

Sources: [1] [2] [3] [4]

KIP (Signal K instrument panel)free app · Free, MIT licence

Documented

Alarm sounds from hardware aboard, not the phone
No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Signal K
Configurable dashboard

Documented, with a limit

Alarms on instrument values

Established absent

Alerts spoken aloud

The maker does not say

NMEA 0183
Multi-engine display
Old readings flagged as stale

Alarm runs on: a device fitted aboard
Free tier: free app (no paid tier)
Wearable: none stated

Sources: [1] [2] [3] [4]

Maretron N2KViewapp free; gateway, licences and modules sold through dealers · Maretron's product pages show no prices and sell licence keys 'via our dealer network'; its own 2023 US list price PDF (maretron.com, Maretron Brand Price List 7.1.23) gives the IPG100 gateway at $709 and N2KView for a PC at $695, and N2KView Mobile is free.

Documented

Alarm sounds from hardware aboard, not the phone
Works offline aboard
Alarms on instrument values

Documented, with a limit

Configurable dashboard

Established absent

Alerts spoken aloud
NMEA 0183
Signal K

The maker does not say

No subscription
Every phone and tablet, no per-device fee
Multi-engine display
Old readings flagged as stale

Alarm runs on: a device fitted aboard
Alerts ashore: E-mail and SMS off the boat, plus live remote screens over the vessel's own internet link (Real Time Cloud Service). Maker: 'marina WiFi, satellite connection, GSM or cell phone modem'.
Free tier: app free, gateway and licences extra

Sources: [1] [2] [3]

NMEA Dashboardfree app · Free (Google Play US: Install); open source, MIT licence

Documented

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
NMEA 0183
Configurable dashboard
Alarms on instrument values
Old readings flagged as stale

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Multi-engine display

The maker does not say

Signal K

Alarm runs on: the phone, tablet or computer running the app
Free tier: free app (no paid tier)
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

NMEAremoteone-off · in euros: €24.99 (App Store, Germany) · USD 23.99 one-off, no subscriptions (App Store US); NMEAremote LITE USD 3.99

Documented

No subscription
Works offline aboard
NMEA 0183
Signal K
Configurable dashboard
Alarms on instrument values
Multi-engine display
Old readings flagged as stale

Documented, with a limit

Alerts spoken aloud
Every phone and tablet, no per-device fee

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app
Free tier: no free tier
Wearable: Native Apple Watch app (included in full and LITE, no subscription): navigation, wind, weather, AIS, depth, performance, racing, engine, battery/tank data on a customisable dashboard (set up by file import, no on-watch editor yet). Can run tethered to the iPhone or standalone over local Wi-Fi or cellular via HTTP, e.g. from an iPad server at the chart table. Also ActiveLook smart glasses for heads-up data.

Sources: [1] [2] [3] [4] [5] [6]

NV Chartsfreemium · App free. Charts €49.90 per region per year, auto-renewing, 15 regions; or bundled with a paper chart in a combo pack with a one-year update service.

Documented

Works offline aboard
NMEA 0183

Documented, with a limit

No subscription
Configurable dashboard

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Alerts spoken aloud
Every phone and tablet, no per-device fee
Signal K
Alarms on instrument values
Multi-engine display
Old readings flagged as stale

Alarm runs on: the phone, tablet or computer running the app
Free tier: app free, charts paid

Sources: [1] [2]

OpenCPNfree (desktop); one-off (Android) · Desktop free; Android USD 9.95 one-off (Google Play US)

Documented

No subscription
Works offline aboard
NMEA 0183
Signal K
Configurable dashboard
Multi-engine display
Old readings flagged as stale

Documented, with a limit

Every phone and tablet, no per-device fee
Alarms on instrument values

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app
Free tier: Desktop free (no paid tier); Android version USD 9.95 one-off
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6] [7] [8]

Documented

Alarm sounds from hardware aboard, not the phone
No subscription
Every phone and tablet, no per-device fee
Configurable dashboard
Multi-engine display

Documented, with a limit

Works offline aboard

Established absent

Alerts spoken aloud
Alarms on instrument values

The maker does not say

NMEA 0183
Signal K
Old readings flagged as stale

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: Free: online charts (restricted in AU, SE, DK, DE, TR), POIs, weather 5 days, engine routing 50 NM, AIS via internet, 7-day logbook; instruments, radar, autopilot need an Orca Core
Wearable: Apple Watch app (watchOS 9.0+). The manual says the Core lets you control your autopilot wirelessly from phone, tablet and Apple Watch, so this needs an Orca Core. No other watch functions described.

Sources: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12]

Documented

Alerts spoken aloud
Works offline aboard
Configurable dashboard
Old readings flagged as stale

Documented, with a limit

Every phone and tablet, no per-device fee
NMEA 0183
Alarms on instrument values

Established absent

Alarm sounds from hardware aboard, not the phone
No subscription
Multi-engine display

The maker does not say

Signal K

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free: overview chart, positioning, 2D/3D views, route planning, Anchor Watch, trip recording, tides/currents, GFS weather, offline weather; 7-day TZ MAPS trial for one region
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

WilhelmSKone-off · iOS USD 19.99 one-off; macOS USD 19.99 (App Store US)

Documented

Alarm sounds from hardware aboard, not the phone
No subscription
Works offline aboard
NMEA 0183
Signal K
Configurable dashboard
Alarms on instrument values
Multi-engine display
Old readings flagged as stale

Documented, with a limit

Every phone and tablet, no per-device fee

Established absent

Alerts spoken aloud

The maker does not say

none

Alarm runs on: the app and a device fitted aboard
Alerts ashore: push
Free tier: no free tier
Wearable: Apple Watch app (installs from the iPhone app): wind, speed, depth, battery, switch and autopilot gauges plus complications; layout set on the iPhone. The guide says the phone must be awake and in range for setup; non-Signal K sources always route through the phone; Signal K data can keep flowing to the watch over Wi-Fi or cellular without the phone.

Sources: [1] [2] [3] [4] [5]

Category

Remote monitoring

On a phone the comparison grid is replaced by the verdicts below, one per app, which carry the same marks in words. The grid is there on a wider screen.

The specialists that document the most of this table: Nautic Alert (Triton), YS Pro and Sentinel (Sentinel Premium / Sentinel GO). What the Galvanic Sailing app documents that the others mostly do not: Alerts spoken aloud (documented, fully or in part, by 2 of 15 others); Man overboard and its position seen ashore (documented, fully or in part, by 1 of 15 others); Alarm sounds through silent and Do Not Disturb (documented, fully or in part, by 0 of 15 others); End-to-end encryption (documented, fully or in part, by 1 of 15 others).

15 apps compared with ours on 20 features.

App	Alerts spoken aloud	Alarm sounds from hardware aboard, not the phone	No subscription	Every phone and tablet, no per-device fee	Works offline aboard	Battery	Bilge	Shore power	Position/geofence	Intrusion/motion	Engine data	Own cellular or satellite modem	Alerts reach people ashore	Man overboard and its position seen ashore	Fire/smoke/temperature	Cameras	Remote switching	Anchor watch from ashore	Alarm sounds through silent and Do Not Disturb	End-to-end encryption	Price, as published
Galvanic Sailing appGalvanic Works S.L. · Android 7.0+ on Google Play; iOS 15.5+ on the App Store; phones and tablets	✔	✔	✔	✔	✔	✔	✔	✔	~	✘	✔	✘	✔	✔	✘	✘	✘	✔	✔	✔	free to download; the full app with a Galvanic Voice aboard · Galvanic Voice €1,149.50 incl. 21% Spanish VAT (€950 ex-VAT) · chart, weather and position free on any phone, and a guided tour and simulation of every tab; no subscription; official nautical charts, when offered, will be a paid extra charged per boat
BRNKL 5GBarnacle Systems · iOS; Android; web	✘	✔	✘	✔	✘	✔	✔	✔	✔	✔	✘	✔	✔	✘	~	~	~	✔	?	?	subscription · Cellular subscriptions from USD 215/year (brochure); BRNKL Blue: no subscription required
Garmin OnDeck (ActiveCaptain app)Garmin · iOS; Android	✘	✔	✘	✔	~	✔	✔	✔	✔	✔	~	✔	✔	✘	~	✘	✔	~	?	?	subscription · OnDeck Hub USD 849.99 · Monthly Plan with Annual Contract USD 12.99/month (3-month promotion period); Monthly Plan USD 19.99/month (no contract)
GOST Watch (GOST Specter app)GOST Global · iOS; Android	?	✔	~	?	✔	?	✔	✔	✔	✔	~	✔	✔	?	✔	✔	?	✔	?	?	no published price
Maretron N2KViewMaretron, now under Raymarine / Teledyne FLIR (store listings name Raymarine UK Limited; maretron.com still carries the Maretron brand, Jupiter, Florida) · PC; Mac; Maretron MBB300C, TSM800/800C/810C/1330/1330C; iPhone; iPad; Android	✘	✔	?	?	✔	✔	✔	✔	✔	✔	✔	✔	✔	?	?	?	?	?	?	?	app free; gateway, licences and modules sold through dealers · Maretron's product pages show no prices and sell licence keys 'via our dealer network'; its own 2023 US list price PDF (maretron.com, Maretron Brand Price List 7.1.23) gives the IPG100 gateway at $709 and N2KView for a PC at $695, and N2KView Mobile is free.
Nautic Alert (Triton)Nautic Alert · iOS; Android	✔	✔	✘	✔	~	✔	✔	✔	✔	✔	✘	✔	✔	~	✔	?	✔	✔	?	?	subscription · Triton USD 1,995.00 MSRP; Insight X2 LTE USD 2,499 MSRP; Insight X2 Iridium USD 2,699 MSRP · Triton: Satellite & Cellular Standard USD 29.99/month; Satellite & Cellular Enhanced USD 39.99/month; Satellite & Cellular Extended USD 49.99/month
Raymarine app + YachtSense LinkRaymarine · iOS and Android (maker's manual, May 2026)	✘	✔	✘	✔	✔	~	~	?	~	?	~	✔	~	?	?	?	✔	~	?	?	subscription · in euros: YachtSense Link €1,295 ex-VAT (raymarine.com), One Boat plan €174.99 a year (App Store, Germany) · YachtSense Link USD 1,319.99 · In-app (US App Store): One Boat Monthly USD 19.99; One Boat Six Monthly USD 109.99; One Boat Yearly USD 199.99; Two Boats Monthly USD 37.99; Two Boats 6 Months USD 209.99; Two Boats 1 Year USD 399.99
SailsenseSailsense Analytics · Android; the iOS listing (id1459241207) was no longer on the App Store when checked, 24 Sep 2026	✘	✔	✘	~	~	✔	~	~	✔	✔	✔	✔	~	✘	~	?	~	~	?	?	freemium · Basic: free; Starter €120/year; Pro €300/year
SeaGuardianSeaGuardian with The 24hr Solutions Group (App Store seller: 24HR Vehicle Solutions Ltd, UK) · iOS (App Store GB); maker says Google Play too	✘	✘	~	✔	~	?	?	✘	✔	?	?	?	✔	✘	?	?	?	✔	?	✘	freemium · App Store GB: app is a paid download £1.99 plus in-app purchase "SeaGuardian" £1.99; maker site: free account, Silver £1.99/month, Gold coming soon
Sensar MarineSensar Marine · iOS; Android	✘	✔	✘	~	~	✔	✔	✘	✔	✔	✘	✔	✔	✘	~	?	?	~	?	?	subscription · Boat Monitor USD 399 / EUR 399 (excl. VAT) · Monthly USD 17.99/month; Annual USD 144/year; Two Year USD 240 per 2 years
Sentinel (Sentinel Premium / Sentinel GO)Sentinel Marine Solutions · iOS; Android	✘	✔	✘	✔	✘	✔	✔	✔	✔	✔	✔	✔	✔	✘	~	~	✔	✔	?	?	freemium · Bundles (EUR, incl. VAT): SafeGuard €699; Secure €819; Analog Engine Watch €769; Digital Engine Watch €1,179; Smart Comfort €1,359; SafeGuard Plus €1,259; Flagship €2,599; Custom on request · Sentinel GO app: free. Plan S €150/year; Plan M €224/year; Plan L €310/year (bundles include first year)
Siren Connected BoatYamaha Motor Co., Ltd. (Siren Marine) · iOS; Android; macOS (Apple M1 or later)	✘	✔	✘	~	~	✔	✔	✔	✔	✔	✔	✔	✔	✘	~	?	✔	~	?	?	subscription · Siren 3 USD 299.99; Siren 3 Pro USD 799.99; wireless sensors USD 139.09 each; Shore Power Sensor Plug USD 72.79; 120V AC Shore Power Relay USD 69.67; 240V AC Shore Power Relay USD 101.91 · Siren Marine cellular plans (USD): Monthly $22.00/1 month; Seasonal $150.00/season; Annual $225.00/1 year; 3 Year Cellular $575.00; 5 Year Cellular $900.00. SirenSat Offshore (cellular also required): 1 year $350.00; 2 years $700.00; 3 years $1,050.00
Vesper Cortex (Cortex Onboard / Cortex Monitor)Garmin New Zealand Ltd (Vesper Marine) · NMEA 2000 and NMEA 0183 hub with built-in WiFi for up to 10 devices; iOS and Android apps	~	✔	~	~	~	✔	~	~	~	✔	?	✔	~	?	~	?	✔	~	?	?	freemium · Cortex M1 Hub $1,449.99 USD; Cortex V1 Hub $1,999.99 USD (garmin.com US) · Cortex Monitoring Plan (US): Free Plan (Monitor Lite); Monthly Plan $19.95 USD; Annual Plan $159.95 USD per year. US prices exclude state/local taxes; non-US prices include VAT; auto-renew
VictronConnectVictron Energy B.V. (Netherlands) · iOS; Android; Windows; macOS; Linux (AppImage)	✘	✔	✔	✔	✔	✔	?	?	?	?	?	✔	✘	?	?	?	?	?	?	?	free app · Victron publishes a public EUR pricelist (ex VAT, 2026-Q3): VE.Direct Bluetooth Smart dongle €42; VE.Bus Smart dongle €100; VE.Direct to USB €30; BMV-712 Smart €152; SmartShunt 500A €107; Cerbo GX MK2 €265; GX LTE 4G €213. · Free everywhere, no tier, no subscription.
VRM (Victron Remote Management)Victron Energy · iOS; Android; web	✘	✘	✔	✔	✘	✔	✔	~	✔	?	~	✔	✔	✘	~	?	✔	~	?	?	free app · VRM is free
YS ProYacht Sentinel · iOS; Android	✘	✔	✘	✔	~	✔	✔	✔	✔	✔	✔	✔	✔	✘	✔	?	✔	~	?	~	subscription · YS PRO €1,590 excl. VAT & delivery · Zone EU and Zone US €20/month; Zone J and Zone I €25/month; Zone H €30/month; Zone A1 €50/month (yacht-sentinel.com/products/ys-pro, read 5 Oct 2026); the maker's support page states the standard fee as €10/month

The verdicts, one by one (16)

Documented

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Battery
Bilge
Shore power
Engine data
Alerts reach people ashore
Man overboard and its position seen ashore
Anchor watch from ashore
Alarm sounds through silent and Do Not Disturb
End-to-end encryption

Documented, with a limit

Position/geofence

Established absent

Intrusion/motion
Own cellular or satellite modem
Fire/smoke/temperature
Cameras
Remote switching

The maker does not say

none

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: free to download: chart, weather and position on any phone, and a guided tour and simulation of every tab (manual §38 and §40; store listing); the full app needs a Galvanic Voice aboard
Wearable: Galvanic Pulse bracelet (up to 16 per vessel): IP67 BLE 5.0 wristband with vibration motor, buzzer, LED and one button. Does: man-overboard alert when unheard for longer than the captain-set delay (from 10 s to 10 min, default 60 s) while under way; 'has left the boat' notice at anchor or in harbour; watch-reminder vibration with triple-tap acknowledge; rest and activity detection feeding the fatigue model (§27); can be paired to equipment such as a harness. Battery about 2 months, charges from USB. Limits: bodies, metal bulkheads, engine rooms and aluminium or steel hulls attenuate the BLE signal, so a sleeper lying on the arm can go unheard; every phone and tablet aboard with the Galvanic Sailing app acts as an extra listener for the Galvanic Pulse bracelets (Galvanic Pulse listening, §30). One Galvanic Voice is loud enough to wake the whole boat. People add more for convenience: with a unit close by, an alert can be silenced with a wave of the hand past it, wherever they are aboard. Range in metres not given in the manual. Manual describes no smartwatch app. (manual §23 to §34)

Sources: Galvanic Voice manual v0.642, read it at https://galvanicworks.com/products/: §17 Voice Alerts reference; Galvanic Pulse §23 to §34; manual §35 (offline areas incl. Satellite and Meteo; no per-screen licences), §38 layers, §39 encounter animation, §41 optional anchor alarms, §43, §44.7, §44.8, §45.2.3, §49.9, §50.3, §50.4; manual §26 multi-unit

BRNKL 5Gsubscription · Cellular subscriptions from USD 215/year (brochure); BRNKL Blue: no subscription required

Documented

Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee
Battery
Bilge
Shore power
Position/geofence
Intrusion/motion
Own cellular or satellite modem
Alerts reach people ashore
Anchor watch from ashore

Documented, with a limit

Fire/smoke/temperature
Cameras
Remote switching

Established absent

Alerts spoken aloud
No subscription
Works offline aboard
Engine data
Man overboard and its position seen ashore

The maker does not say

Alarm sounds through silent and Do Not Disturb
End-to-end encryption

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: BRNKL Blue: no subscription required (uses Starlink or other onboard internet); BRNKL 5G cellular plans from USD 215/year
Wearable: none stated

Sources: [1] [2] [3]

Garmin OnDeck (ActiveCaptain app)subscription · OnDeck Hub USD 849.99 · Monthly Plan with Annual Contract USD 12.99/month (3-month promotion period); Monthly Plan USD 19.99/month (no contract)

Documented

Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee
Battery
Bilge
Shore power
Position/geofence
Intrusion/motion
Own cellular or satellite modem
Alerts reach people ashore
Remote switching

Documented, with a limit

Works offline aboard
Engine data
Fire/smoke/temperature
Anchor watch from ashore

Established absent

Alerts spoken aloud
No subscription
Man overboard and its position seen ashore
Cameras

The maker does not say

Alarm sounds through silent and Do Not Disturb
End-to-end encryption

Alarm runs on: a device fitted aboard
Alerts ashore: SMS, email
Free tier: no free tier (service plan required to use OnDeck services)
Wearable: none stated

Sources: [1] [2] [3] [4]

GOST Watch (GOST Specter app)no published price

Documented

Alarm sounds from hardware aboard, not the phone
Works offline aboard
Bilge
Shore power
Position/geofence
Intrusion/motion
Own cellular or satellite modem
Alerts reach people ashore
Fire/smoke/temperature
Cameras
Anchor watch from ashore

Documented, with a limit

No subscription
Engine data

Established absent

none

The maker does not say

Alerts spoken aloud
Every phone and tablet, no per-device fee
Battery
Man overboard and its position seen ashore
Remote switching
Alarm sounds through silent and Do Not Disturb
End-to-end encryption

Alarm runs on: a device fitted aboard
Alerts ashore: SMS
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

Documented

Alarm sounds from hardware aboard, not the phone
Works offline aboard
Battery
Bilge
Shore power
Position/geofence
Intrusion/motion
Engine data
Own cellular or satellite modem
Alerts reach people ashore

Established absent

Alerts spoken aloud

The maker does not say

No subscription
Every phone and tablet, no per-device fee
Man overboard and its position seen ashore
Fire/smoke/temperature
Cameras
Remote switching
Anchor watch from ashore
Alarm sounds through silent and Do Not Disturb
End-to-end encryption

Alarm runs on: a device fitted aboard
Alerts ashore: E-mail and SMS off the boat, plus live remote screens over the vessel's own internet link (Real Time Cloud Service). Maker: 'marina WiFi, satellite connection, GSM or cell phone modem'.
Free tier: app free, gateway and licences extra

Sources: [1] [2] [3]

Nautic Alert (Triton)subscription · Triton USD 1,995.00 MSRP; Insight X2 LTE USD 2,499 MSRP; Insight X2 Iridium USD 2,699 MSRP · Triton: Satellite & Cellular Standard USD 29.99/month; Satellite & Cellular Enhanced USD 39.99/month; Satellite & Cellular Extended USD 49.99/month

Documented

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee
Battery
Bilge
Shore power
Position/geofence
Intrusion/motion
Own cellular or satellite modem
Alerts reach people ashore
Fire/smoke/temperature
Remote switching
Anchor watch from ashore

Documented, with a limit

Works offline aboard
Man overboard and its position seen ashore

Established absent

No subscription
Engine data

The maker does not say

Cameras
Alarm sounds through silent and Do Not Disturb
End-to-end encryption

Alarm runs on: a device fitted aboard
Alerts ashore: push, SMS, email, voice call
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6]

Raymarine app + YachtSense Linksubscription · in euros: YachtSense Link €1,295 ex-VAT (raymarine.com), One Boat plan €174.99 a year (App Store, Germany) · YachtSense Link USD 1,319.99 · In-app (US App Store): One Boat Monthly USD 19.99; One Boat Six Monthly USD 109.99; One Boat Yearly USD 199.99; Two Boats Monthly USD 37.99; Two Boats 6 Months USD 209.99; Two Boats 1 Year USD 399.99

Documented

Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee
Works offline aboard
Own cellular or satellite modem
Remote switching

Documented, with a limit

Battery
Bilge
Position/geofence
Engine data
Alerts reach people ashore
Anchor watch from ashore

Established absent

Alerts spoken aloud
No subscription

The maker does not say

Shore power
Intrusion/motion
Man overboard and its position seen ashore
Fire/smoke/temperature
Cameras
Alarm sounds through silent and Do Not Disturb
End-to-end encryption

Alarm runs on: a device fitted aboard
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

Sailsensefreemium · Basic: free; Starter €120/year; Pro €300/year

Documented

Alarm sounds from hardware aboard, not the phone
Battery
Position/geofence
Intrusion/motion
Engine data
Own cellular or satellite modem

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard
Bilge
Shore power
Alerts reach people ashore
Fire/smoke/temperature
Remote switching
Anchor watch from ashore

Established absent

Alerts spoken aloud
No subscription
Man overboard and its position seen ashore

The maker does not say

Cameras
Alarm sounds through silent and Do Not Disturb
End-to-end encryption

Alarm runs on: a device fitted aboard
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6]

SeaGuardianfreemium · App Store GB: app is a paid download £1.99 plus in-app purchase "SeaGuardian" £1.99; maker site: free account, Silver £1.99/month, Gold coming soon

Documented

Every phone and tablet, no per-device fee
Position/geofence
Alerts reach people ashore
Anchor watch from ashore

Documented, with a limit

No subscription
Works offline aboard

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Shore power
Man overboard and its position seen ashore
End-to-end encryption

The maker does not say

Battery
Bilge
Intrusion/motion
Engine data
Own cellular or satellite modem
Fire/smoke/temperature
Cameras
Remote switching
Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: SMS
Free tier: Free account: sail plan, tracking, overdue alerts and SOS work on any plan; Silver £1.99/month for the rest
Wearable: none stated

Sources: [1] [2] [3] [4]

Sensar Marinesubscription · Boat Monitor USD 399 / EUR 399 (excl. VAT) · Monthly USD 17.99/month; Annual USD 144/year; Two Year USD 240 per 2 years

Documented

Alarm sounds from hardware aboard, not the phone
Battery
Bilge
Position/geofence
Intrusion/motion
Own cellular or satellite modem
Alerts reach people ashore

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard
Fire/smoke/temperature
Anchor watch from ashore

Established absent

Alerts spoken aloud
No subscription
Shore power
Engine data
Man overboard and its position seen ashore

The maker does not say

Cameras
Remote switching
Alarm sounds through silent and Do Not Disturb
End-to-end encryption

Alarm runs on: a device fitted aboard
Alerts ashore: SMS
Free tier: no free tier (active devices require a subscription)
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

Sentinel (Sentinel Premium / Sentinel GO)freemium · Bundles (EUR, incl. VAT): SafeGuard €699; Secure €819; Analog Engine Watch €769; Digital Engine Watch €1,179; Smart Comfort €1,359; SafeGuard Plus €1,259; Flagship €2,599; Custom on request · Sentinel GO app: free. Plan S €150/year; Plan M €224/year; Plan L €310/year (bundles include first year)

Documented

Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee
Battery
Bilge
Shore power
Position/geofence
Intrusion/motion
Engine data
Own cellular or satellite modem
Alerts reach people ashore
Remote switching
Anchor watch from ashore

Documented, with a limit

Fire/smoke/temperature
Cameras

Established absent

Alerts spoken aloud
No subscription
Works offline aboard
Man overboard and its position seen ashore

The maker does not say

Alarm sounds through silent and Do Not Disturb
End-to-end encryption

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: Sentinel GO: free, no hardware; trip tracking, digital logbook, maintenance logs, checklists, demo mode. Monitoring/alarms need Boat Monitor + subscription
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

Siren Connected Boatsubscription · Siren 3 USD 299.99; Siren 3 Pro USD 799.99; wireless sensors USD 139.09 each; Shore Power Sensor Plug USD 72.79; 120V AC Shore Power Relay USD 69.67; 240V AC Shore Power Relay USD 101.91 · Siren Marine cellular plans (USD): Monthly $22.00/1 month; Seasonal $150.00/season; Annual $225.00/1 year; 3 Year Cellular $575.00; 5 Year Cellular $900.00. SirenSat Offshore (cellular also required): 1 year $350.00; 2 years $700.00; 3 years $1,050.00

Documented

Alarm sounds from hardware aboard, not the phone
Battery
Bilge
Shore power
Position/geofence
Intrusion/motion
Engine data
Own cellular or satellite modem
Alerts reach people ashore
Remote switching

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard
Fire/smoke/temperature
Anchor watch from ashore

Established absent

Alerts spoken aloud
No subscription
Man overboard and its position seen ashore

The maker does not say

Cameras
Alarm sounds through silent and Do Not Disturb
End-to-end encryption

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: no free tier (all Siren systems require a subscription plan)
Wearable: Apple Watch (App Store: "You can also use our app on your Apple Watch!") and Wear OS smartwatch (Google Play); watch functions and limitations not stated

Sources: [1] [2] [3] [4] [5] [6] [7] [8] [9]

Vesper Cortex (Cortex Onboard / Cortex Monitor)freemium · Cortex M1 Hub $1,449.99 USD; Cortex V1 Hub $1,999.99 USD (garmin.com US) · Cortex Monitoring Plan (US): Free Plan (Monitor Lite); Monthly Plan $19.95 USD; Annual Plan $159.95 USD per year. US prices exclude state/local taxes; non-US prices include VAT; auto-renew

Documented

Alarm sounds from hardware aboard, not the phone
Battery
Intrusion/motion
Own cellular or satellite modem
Remote switching

Documented, with a limit

Alerts spoken aloud
No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Bilge
Shore power
Position/geofence
Alerts reach people ashore
Fire/smoke/temperature
Anchor watch from ashore

Established absent

none

The maker does not say

Engine data
Man overboard and its position seen ashore
Cameras
Alarm sounds through silent and Do Not Disturb
End-to-end encryption

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: app setup free; real-time alerts, remote control, vessel tracking, geofence and AnchorWatch require unlocking the hub (paid plan)
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6] [7] [8] [9]

VictronConnectfree app · Victron publishes a public EUR pricelist (ex VAT, 2026-Q3): VE.Direct Bluetooth Smart dongle €42; VE.Bus Smart dongle €100; VE.Direct to USB €30; BMV-712 Smart €152; SmartShunt 500A €107; Cerbo GX MK2 €265; GX LTE 4G €213. · Free everywhere, no tier, no subscription.

Documented

Alarm sounds from hardware aboard, not the phone
No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Battery
Own cellular or satellite modem

Established absent

Alerts spoken aloud
Alerts reach people ashore

The maker does not say

Bilge
Shore power
Position/geofence
Intrusion/motion
Engine data
Man overboard and its position seen ashore
Fire/smoke/temperature
Cameras
Remote switching
Anchor watch from ashore
Alarm sounds through silent and Do Not Disturb
End-to-end encryption

Alarm runs on: a device fitted aboard
Alerts ashore: None. The maker states alarms and errors are only shown while the app is open.
Free tier: free

Sources: [1] [2]

VRM (Victron Remote Management)free app · VRM is free

Documented

No subscription
Every phone and tablet, no per-device fee
Battery
Bilge
Position/geofence
Own cellular or satellite modem
Alerts reach people ashore
Remote switching

Documented, with a limit

Shore power
Engine data
Fire/smoke/temperature
Anchor watch from ashore

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Works offline aboard
Man overboard and its position seen ashore

The maker does not say

Intrusion/motion
Cameras
Alarm sounds through silent and Do Not Disturb
End-to-end encryption

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: push, email
Free tier: free app (no paid tier)
Wearable: VRM smartwatch app for Apple Watch (watchOS 10.5+), Wear OS and Garmin (Connect IQ): system overview (battery, grid, solar, loads), temperature sensor data, tank levels, relay switching, generator and EV charger control, watch-face complications. Data refreshes every 5 minutes; paired phone must be online; controls only for admin/technician users. Alarms on the watch not stated

Sources: [1] [2] [3] [4] [5] [6] [7] [8]

YS Prosubscription · YS PRO €1,590 excl. VAT & delivery · Zone EU and Zone US €20/month; Zone J and Zone I €25/month; Zone H €30/month; Zone A1 €50/month (yacht-sentinel.com/products/ys-pro, read 5 Oct 2026); the maker's support page states the standard fee as €10/month

Documented

Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee
Battery
Bilge
Shore power
Position/geofence
Intrusion/motion
Engine data
Own cellular or satellite modem
Alerts reach people ashore
Fire/smoke/temperature
Remote switching

Documented, with a limit

Works offline aboard
Anchor watch from ashore
End-to-end encryption

Established absent

Alerts spoken aloud
No subscription
Man overboard and its position seen ashore

The maker does not say

Cameras
Alarm sounds through silent and Do Not Disturb

Alarm runs on: a device fitted aboard
Alerts ashore: push, email
Wearable: none stated

Sources: [1] [2] [3]

Category

Anchor watch

On a phone the comparison grid is replaced by the verdicts below, one per app, which carry the same marks in words. The grid is there on a wider screen.

The specialists that document the most of this table: Vesper Cortex (Cortex Onboard / Cortex Monitor), Anchor Alert (PredictWind), Maretron N2KView and Salt & Wire Companion. What the Galvanic Sailing app documents that the others mostly do not: Alerts spoken aloud (documented, fully or in part, by 2 of 18 others); Automatic anchoring detection (documented, fully or in part, by 2 of 18 others); Alarm sounds through silent and Do Not Disturb (documented, fully or in part, by 1 of 18 others); Pressure-fall alarm at anchor (documented, fully or in part, by 1 of 18 others).

18 apps compared with ours on 13 features.

From our anchor-alarm group review, July 2026

In July we compared thirty systems that carry an anchor alarm, from phone apps and chartplotters to monitoring hubs, smart buoys and dedicated alarm boxes, on the anchor-alarm job alone. Galvanic Voice, the system this app runs with, starts itself, watches the wind and the falling barometer as well as the position, and speaks the problem aloud, from one unit aboard.

Read the anchor-alarm group review

App	Alerts spoken aloud	Alarm sounds from hardware aboard, not the phone	No subscription	Every phone and tablet, no per-device fee	Works offline aboard	Drag alarm	Automatic anchoring detection	Swing-circle display	Alarm relayed to another phone	Wind-shift/wind-increase alert	Alarm sounds through silent and Do Not Disturb	Pressure-fall alarm at anchor	Shallow-water alarm at anchor	Price, as published
Galvanic Sailing appGalvanic Works S.L. · Android 7.0+ on Google Play; iOS 15.5+ on the App Store; phones and tablets	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	free to download; the full app with a Galvanic Voice aboard · Galvanic Voice €1,149.50 incl. 21% Spanish VAT (€950 ex-VAT) · chart, weather and position free on any phone, and a guided tour and simulation of every tab; no subscription; official nautical charts, when offered, will be a paid extra charged per boat
Anchor Alarm / Watch (Ankeralarm)w+h GmbH · iOS; iPadOS; Android	✘	✘	✔	~	✔	✔	✘	✔	~	✘	✘	?	✘	freemium · US App Store: Unlock as a subscription $3.99 USD (period not shown); Unlock as a one-time purchase $22.99 USD; Anchorage search subscription $9.49 USD; 30 days anchorage search $3.99 USD; 8 days anchorage search $2.99 USD. FAQ (Germany): subscription €2.99 per year; one-time purchase €19.99; anchorage search €2.99/8 days, €4.99/30 days, €9.99/year. Google Play US: $2.49 – $24.99 per item
Anchor Alarm 219Y219.com · Android	✘	✘	✔	~	~	✔	✘	✔	✔	✘	?	?	✘	one-off · No subscription required. One-time in-app purchase unlocks full version: Google Play US $4.99 per item
Anchor Alarm: ZENKOU PROUNITIO PLUS SL (Unitio A) · iOS; iPadOS; macOS (Apple M1 or later); visionOS	✘	✘	~	~	~	✔	✘	✔	~	✘	?	?	✘	freemium · US App Store: Premium Features – 1 month $9.99; Premium Features – 1 year $29.99; Premium Features – Lifetime $99.99; Remote LIVE Alerts – 1 week $8.49; Remote LIVE Alerts- 1 week $17.49; Remote LIVE Alerts – 1 Year $25.49; LIVE Features – Lifetime $99.99; Marine Barometer – 1 month $7.99; Marine Barometer – 1 year $27.99; Barometer Lifetime $49.99 (all USD)
Anchor AlertSlimJiM Software · Android	✘	✘	✔	~	✔	✔	✘	✔	~	~	?	?	✘	one-off · No subscription listed. Google Play US: $11.99 USD
Anchor Alert (PredictWind)PredictWind Limited · iOS; iPadOS; visionOS	✘	✔	~	~	~	✔	?	✔	~	~	✔	✘	~	freemium · DataHub US$299; DataHub Pro US$599; NMEA 2000 M12 Cable Pack US$49; DataHub Pro LTE plan $10 USD/month; DataHub Pro Starlink DTC plan $15 USD/month · Free $0 (anchor drag & swing alerts, anchor data dashboard). Anchor Alert Pro: US App Store Anchor Pro 1 monthly $15.00; Anchor Pro 3 monthly $29.00; Anchor Pro Yearly $99.00 (USD). Website: $15 USD/month monthly; $9.66 USD/month ($29 billed 3 monthly). Included free with PredictWind Pro forecast subscription
Anchor ProIdeaBoys GmbH · iOS; iPadOS; watchOS; visionOS; Android	✘	✘	~	✔	~	✔	✘	✔	~	✘	?	✘	✘	freemium · US App Store: Anchor Premium $6.99 USD/year (pricing may vary by country); free trial of premium features
Anchor SentryMichael Dieter Konz · iOS; iPadOS; Android	✘	✘	✔	~	~	✔	✔	✔	~	✘	?	✘	✘	one-off · No subscription listed. Paid app: US App Store $3.99 USD; Google Play US $4.49 USD
Aqua Map BoatingGEC s.r.l. · iOS; iPadOS; macOS (Apple silicon)	~	✘	✔	~	~	✔	?	✔	~	?	?	?	~	subscription · in euros: Expert €14.99, Master €24.99, chart regions from €14.99 (App Store, Germany) · Chart subscription per region, 1 year (App Store US list, USD): US & Canada nautical charts 14.99 and 49.99; US – Nautical & Lakes charts 9.99; Canada 9.99; Bermuda 14.99; Caribbean South 14.99; Bahamas Explorer Charts 49.99; Bahamas Explorer Chartbooks 139.99. Expert: nautical chart cost + USD 14.99/year; Master (USA & Canada only): nautical chart cost + USD 24.99/year (aquamap.app). 14-day free trial
Maretron N2KViewMaretron, now under Raymarine / Teledyne FLIR (store listings name Raymarine UK Limited; maretron.com still carries the Maretron brand, Jupiter, Florida) · PC; Mac; Maretron MBB300C, TSM800/800C/810C/1330/1330C; iPhone; iPad; Android	✘	✔	?	?	✔	✔	✔	~	✔	✔	?	?	?	app free; gateway, licences and modules sold through dealers · Maretron's product pages show no prices and sell licence keys 'via our dealer network'; its own 2023 US list price PDF (maretron.com, Maretron Brand Price List 7.1.23) gives the IPG100 gateway at $709 and N2KView for a PC at $695, and N2KView Mobile is free.
moodSailorSociété Française d'Infonuagique (France) · iOS 15.0+; Android	✘	✘	✔	✔	✔	✔	?	✔	?	?	?	?	?	free · No price published anywhere, in any currency. Free on both stores, no in-app purchase, no subscription, no pro tier, no ads. Maker: "The whole app, all of its features, for free." AIS arrives free over community networks (aisstream.io, pelyr.com).
NV ChartsNV Chart Group GmbH (Eckernförde, Germany) · iOS; Android; Windows 11/10/8; macOS 10.13+; browser web app at app.nvcharts.com	?	✘	~	?	✔	✔	?	✔	?	?	?	?	?	freemium · App free. Charts €49.90 per region per year, auto-renewing, 15 regions; or bundled with a paper chart in a combo pack with a one-year update service.
OrcaOrca Technologies AS · iOS; iPadOS; watchOS; macOS (Apple M1 or later); Android; Orca Display	✘	✔	✔	✔	~	✔	✘	✔	~	✘	?	✘	✘	subscription · Orca Core 2 EUR 649; Orca Display 2 EUR 999; Charging Mount EUR 349 (getorca.com configurator, delivery to Europe) · Orca Plus EUR 49/year; Orca Smart Navigation EUR 149/year (help centre); App Store US in-app purchase list: Orca Plus USD 44.99, Orca Smart Navigation USD 159.99 and USD 89.99, Orca Subscription USD 129.00 (billing period not stated)
SailGrib AA (Anchor Alarm)SailGrib · Android	✘	✘	~	~	✔	✔	✘	✔	✔	~	?	?	✘	freemium · Premium option (price not stated on official site). Google Play US: $0.99 – $19.99 per item
Salt & Wire CompanionMaciej Jan Karnowski, trading as Salt & Wire (Poland) · Android 7.0+ only; iOS in preparation, no date	✘	✘	✔	✔	✔	✔	?	~	~	?	?	✔	~	freemium · PLUS subscription, Google Play, three-day trial; no labelled price published. Google's in-app purchase range for the listing is EUR 9.49 to EUR 28.99, not confirmed as the PLUS price
Savvy NavvySavvy Navvy ltd · iOS; iPadOS; Android	✘	✘	✘	~	~	~	✘	~	✘	✘	✘	?	✘	subscription · in euros: Elite €119 a year without the Denmark and Italy charts, €139 to €169 with them (App Store, Germany) · Essential GBP 59 per year; Explore GBP 95 per year; Elite GBP 99 per year (savvy-navvy.com pricing, 3-day free trial); App Store US in-app purchase list: Premium USD 99.00, Premium (US-only charts) USD 129.00, Premium Plus (global charts) USD 169.00 (billing period not stated)
Simrad: Companion for BoatersNavico Norway AS · iOS; Android. English only on iOS.	?	✘	~	?	?	~	?	?	?	?	?	?	?	freemium · Free tier plus a Premium subscription with a 14-day free trial (3-day in Denmark and Sweden). Navico publishes no price on any of its own pages; the figure exists only inside the app stores.
Vesper Cortex (Cortex Onboard / Cortex Monitor)Garmin New Zealand Ltd (Vesper Marine) · NMEA 2000 and NMEA 0183 hub with built-in WiFi for up to 10 devices; iOS and Android apps	✔	✔	~	~	✔	✔	✘	✔	~	✔	?	?	✔	freemium · Cortex M1 Hub $1,449.99 USD; Cortex V1 Hub $1,999.99 USD (garmin.com US) · Cortex Monitoring Plan (US): Free Plan (Monitor Lite); Monthly Plan $19.95 USD; Annual Plan $159.95 USD per year. US prices exclude state/local taxes; non-US prices include VAT; auto-renew
YachtaraAD Internet Consulting BV, Belgium (founder Bart Schillebeeks) · web app live; Android live (ai.yachtara.app); iOS not yet released	?	✘	✔	?	✔	✔	?	✔	✘	?	?	?	?	freemium · Free EUR 0; Essential EUR 15 per quarter (about EUR 5 a month); Premium EUR 39 per quarter (about EUR 13 a month); an AI tier is marked coming soon with no price. Billed quarterly or annually, incl. VAT

The verdicts, one by one (19)

Documented

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Drag alarm
Automatic anchoring detection
Swing-circle display
Alarm relayed to another phone
Wind-shift/wind-increase alert
Alarm sounds through silent and Do Not Disturb
Pressure-fall alarm at anchor
Shallow-water alarm at anchor

Established absent

none

The maker does not say

none

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: free to download: chart, weather and position on any phone, and a guided tour and simulation of every tab (manual §38 and §40; store listing); the full app needs a Galvanic Voice aboard
Wearable: Galvanic Pulse bracelet (up to 16 per vessel): IP67 BLE 5.0 wristband with vibration motor, buzzer, LED and one button. Does: man-overboard alert when unheard for longer than the captain-set delay (from 10 s to 10 min, default 60 s) while under way; 'has left the boat' notice at anchor or in harbour; watch-reminder vibration with triple-tap acknowledge; rest and activity detection feeding the fatigue model (§27); can be paired to equipment such as a harness. Battery about 2 months, charges from USB. Limits: bodies, metal bulkheads, engine rooms and aluminium or steel hulls attenuate the BLE signal, so a sleeper lying on the arm can go unheard; every phone and tablet aboard with the Galvanic Sailing app acts as an extra listener for the Galvanic Pulse bracelets (Galvanic Pulse listening, §30). One Galvanic Voice is loud enough to wake the whole boat. People add more for convenience: with a unit close by, an alert can be silenced with a wave of the hand past it, wherever they are aboard. Range in metres not given in the manual. Manual describes no smartwatch app. (manual §23 to §34)

Anchor Alarm / Watch (Ankeralarm)freemium · US App Store: Unlock as a subscription $3.99 USD (period not shown); Unlock as a one-time purchase $22.99 USD; Anchorage search subscription $9.49 USD; 30 days anchorage search $3.99 USD; 8 days anchorage search $2.99 USD. FAQ (Germany): subscription €2.99 per year; one-time purchase €19.99; anchorage search €2.99/8 days, €4.99/30 days, €9.99/year. Google Play US: $2.49 – $24.99 per item

Documented

No subscription
Works offline aboard
Drag alarm
Swing-circle display

Documented, with a limit

Every phone and tablet, no per-device fee
Alarm relayed to another phone

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Automatic anchoring detection
Wind-shift/wind-increase alert
Alarm sounds through silent and Do Not Disturb
Shallow-water alarm at anchor

The maker does not say

Pressure-fall alarm at anchor

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: push
Free tier: local anchor alarm free; location history limited to one hour. Full version adds remote monitoring and unlimited history
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6]

Anchor Alarm 219one-off · No subscription required. One-time in-app purchase unlocks full version: Google Play US $4.99 per item

Documented

No subscription
Drag alarm
Swing-circle display
Alarm relayed to another phone

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Automatic anchoring detection
Wind-shift/wind-increase alert
Shallow-water alarm at anchor

The maker does not say

Alarm sounds through silent and Do Not Disturb
Pressure-fall alarm at anchor

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: SMS
Wearable: none stated

Sources: [1] [2]

Anchor Alarm: ZENKOU PROfreemium · US App Store: Premium Features – 1 month $9.99; Premium Features – 1 year $29.99; Premium Features – Lifetime $99.99; Remote LIVE Alerts – 1 week $8.49; Remote LIVE Alerts- 1 week $17.49; Remote LIVE Alerts – 1 Year $25.49; LIVE Features – Lifetime $99.99; Marine Barometer – 1 month $7.99; Marine Barometer – 1 year $27.99; Barometer Lifetime $49.99 (all USD)

Documented

Drag alarm
Swing-circle display

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Alarm relayed to another phone

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Automatic anchoring detection
Wind-shift/wind-increase alert
Shallow-water alarm at anchor

The maker does not say

Alarm sounds through silent and Do Not Disturb
Pressure-fall alarm at anchor

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: push
Free tier: essential features free; Premium, LIVE (remote alerts), Barometer, Anchor Watch LIVE app and Navionics are separate paid subscriptions
Wearable: Apple Watch: receives iPhone alerts, or monitors the yacht in real time with the Anchor Watch LIVE app (paid subscription). Other limitations not stated

Sources: [1] [2]

Anchor Alertone-off · No subscription listed. Google Play US: $11.99 USD

Documented

No subscription
Works offline aboard
Drag alarm
Swing-circle display

Documented, with a limit

Every phone and tablet, no per-device fee
Alarm relayed to another phone
Wind-shift/wind-increase alert

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Automatic anchoring detection
Shallow-water alarm at anchor

The maker does not say

Alarm sounds through silent and Do Not Disturb
Pressure-fall alarm at anchor

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: SMS
Free tier: no free tier (paid app)
Wearable: none stated

Sources: [1] [2] [3]

Anchor Alert (PredictWind)freemium · DataHub US$299; DataHub Pro US$599; NMEA 2000 M12 Cable Pack US$49; DataHub Pro LTE plan $10 USD/month; DataHub Pro Starlink DTC plan $15 USD/month · Free $0 (anchor drag & swing alerts, anchor data dashboard). Anchor Alert Pro: US App Store Anchor Pro 1 monthly $15.00; Anchor Pro 3 monthly $29.00; Anchor Pro Yearly $99.00 (USD). Website: $15 USD/month monthly; $9.66 USD/month ($29 billed 3 monthly). Included free with PredictWind Pro forecast subscription

Documented

Alarm sounds from hardware aboard, not the phone
Drag alarm
Swing-circle display
Alarm sounds through silent and Do Not Disturb

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Alarm relayed to another phone
Wind-shift/wind-increase alert
Shallow-water alarm at anchor

Established absent

Alerts spoken aloud
Pressure-fall alarm at anchor

The maker does not say

Automatic anchoring detection

Alarm runs on: the app and a device fitted aboard
Alerts ashore: push
Free tier: Free: real-time anchor drag & swing alerts, anchor data dashboard, weather forecasts, Local Knowledge view only. Pro adds scope/wind/depth alerts, N2k data, DataHub connection, remote monitoring & alerts
Wearable: Apple Watch: no watch app stated; iOS mirrors alerts to the watch with a vibration and a light ringtone that is 'difficult to hear', and the vendor advises turning watch notifications off so alerts play loudly on the iPhone.

Sources: [1] [2] [3] [4] [5] [6] [7] [8] [9]

Anchor Profreemium · US App Store: Anchor Premium $6.99 USD/year (pricing may vary by country); free trial of premium features

Documented

Every phone and tablet, no per-device fee
Drag alarm
Swing-circle display

Documented, with a limit

No subscription
Works offline aboard
Alarm relayed to another phone

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Automatic anchoring detection
Wind-shift/wind-increase alert
Pressure-fall alarm at anchor
Shallow-water alarm at anchor

The maker does not say

Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: Telegram, email
Free tier: core features free (ad-supported); Premium removes ads and unlocks extra features; Android listing marks IM/email alarm as Premium; free trial of premium
Wearable: Apple Watch companion app: shows distance, bearing and battery level, updated in real time (App Store). Alarm behaviour and limitations on the watch not stated

Sources: [1] [2] [3] [4] [5]

Anchor Sentryone-off · No subscription listed. Paid app: US App Store $3.99 USD; Google Play US $4.49 USD

Documented

No subscription
Drag alarm
Automatic anchoring detection
Swing-circle display

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard
Alarm relayed to another phone

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Wind-shift/wind-increase alert
Pressure-fall alarm at anchor
Shallow-water alarm at anchor

The maker does not say

Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app
Free tier: no free tier (paid app)
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6] [7]

Documented

No subscription
Drag alarm
Swing-circle display

Documented, with a limit

Alerts spoken aloud
Every phone and tablet, no per-device fee
Works offline aboard
Alarm relayed to another phone
Shallow-water alarm at anchor

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Automatic anchoring detection
Wind-shift/wind-increase alert
Alarm sounds through silent and Do Not Disturb
Pressure-fall alarm at anchor

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: email, Telegram
Free tier: anchor alarm free for everyone; AnchorLink mirroring and remote alerts need Expert or Master; charts need a chart subscription; 14-day trial
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6]

Documented

Alarm sounds from hardware aboard, not the phone
Works offline aboard
Drag alarm
Automatic anchoring detection
Alarm relayed to another phone
Wind-shift/wind-increase alert

Documented, with a limit

Swing-circle display

Established absent

Alerts spoken aloud

The maker does not say

No subscription
Every phone and tablet, no per-device fee
Alarm sounds through silent and Do Not Disturb
Pressure-fall alarm at anchor
Shallow-water alarm at anchor

Alarm runs on: a device fitted aboard
Alerts ashore: E-mail and SMS off the boat, plus live remote screens over the vessel's own internet link (Real Time Cloud Service). Maker: 'marina WiFi, satellite connection, GSM or cell phone modem'.
Free tier: app free, gateway and licences extra

Sources: [1] [2] [3]

Documented

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Drag alarm
Swing-circle display

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone

The maker does not say

Automatic anchoring detection
Alarm relayed to another phone
Wind-shift/wind-increase alert
Alarm sounds through silent and Do Not Disturb
Pressure-fall alarm at anchor
Shallow-water alarm at anchor

Alarm runs on: the phone, tablet or computer running the app
Free tier: everything, free

Sources: [1] [2]

NV Chartsfreemium · App free. Charts €49.90 per region per year, auto-renewing, 15 regions; or bundled with a paper chart in a combo pack with a one-year update service.

Documented

Works offline aboard
Drag alarm
Swing-circle display

Documented, with a limit

No subscription

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Alerts spoken aloud
Every phone and tablet, no per-device fee
Automatic anchoring detection
Alarm relayed to another phone
Wind-shift/wind-increase alert
Alarm sounds through silent and Do Not Disturb
Pressure-fall alarm at anchor
Shallow-water alarm at anchor

Alarm runs on: the phone, tablet or computer running the app
Free tier: app free, charts paid

Sources: [1] [2]

Documented

Alarm sounds from hardware aboard, not the phone
No subscription
Every phone and tablet, no per-device fee
Drag alarm
Swing-circle display

Documented, with a limit

Works offline aboard
Alarm relayed to another phone

Established absent

Alerts spoken aloud
Automatic anchoring detection
Wind-shift/wind-increase alert
Pressure-fall alarm at anchor
Shallow-water alarm at anchor

The maker does not say

Alarm sounds through silent and Do Not Disturb

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: Free plan: online charts, instruments, autopilot/radar control (with Core), AIS via internet, 5-day weather, 50 NM engine routing, 7-day logbook. Guard Mode free for now; later Free = local Guard Mode only, remote in Smart Navigation
Wearable: App Store lists Apple Watch support; watch app functions and limitations not stated in sources read

Sources: [1] [2] [3] [4] [5] [6] [7]

SailGrib AA (Anchor Alarm)freemium · Premium option (price not stated on official site). Google Play US: $0.99 – $19.99 per item

Documented

Works offline aboard
Drag alarm
Swing-circle display
Alarm relayed to another phone

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Wind-shift/wind-increase alert

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Automatic anchoring detection
Shallow-water alarm at anchor

The maker does not say

Alarm sounds through silent and Do Not Disturb
Pressure-fall alarm at anchor

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: SMS, email
Free tier: anchor alarm free; Premium adds hexagonal editable zone, email on alarm, SailGrib WR maps, GPX import, longer track display
Wearable: none stated

Sources: [1] [2] [3] [4]

Documented

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Drag alarm
Pressure-fall alarm at anchor

Documented, with a limit

Swing-circle display
Alarm relayed to another phone
Shallow-water alarm at anchor

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone

The maker does not say

Automatic anchoring detection
Wind-shift/wind-increase alert
Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2]

Documented

none

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard
Drag alarm
Swing-circle display

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription
Automatic anchoring detection
Alarm relayed to another phone
Wind-shift/wind-increase alert
Alarm sounds through silent and Do Not Disturb
Shallow-water alarm at anchor

The maker does not say

Pressure-fall alarm at anchor

Alarm runs on: the phone, tablet or computer running the app
Free tier: 3-day free trial; App Store mentions a free version (contents not stated); anchor alarm only in Elite (Premium in US)
Wearable: none stated

Sources: [1] [2] [3] [4]

Documented

none

Documented, with a limit

No subscription
Drag alarm

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Alerts spoken aloud
Every phone and tablet, no per-device fee
Works offline aboard
Automatic anchoring detection
Swing-circle display
Alarm relayed to another phone
Wind-shift/wind-increase alert
Alarm sounds through silent and Do Not Disturb
Pressure-fall alarm at anchor
Shallow-water alarm at anchor

Alarm runs on: the phone, tablet or computer running the app
Free tier: free tier plus Premium

Sources: [1] [2]

Documented

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Works offline aboard
Drag alarm
Swing-circle display
Wind-shift/wind-increase alert
Shallow-water alarm at anchor

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Alarm relayed to another phone

Established absent

Automatic anchoring detection

The maker does not say

Alarm sounds through silent and Do Not Disturb
Pressure-fall alarm at anchor

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: app setup free; alarms ashore, alerts, remote control, tracking and geofence need a paid Cortex Monitor plan
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6] [7] [8]

Documented

No subscription
Works offline aboard
Drag alarm
Swing-circle display

Established absent

Alarm sounds from hardware aboard, not the phone
Alarm relayed to another phone

The maker does not say

Alerts spoken aloud
Every phone and tablet, no per-device fee
Automatic anchoring detection
Wind-shift/wind-increase alert
Alarm sounds through silent and Do Not Disturb
Pressure-fall alarm at anchor
Shallow-water alarm at anchor

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free EUR 0 plan; contents not stated

Sources: [1] [2] [3]

Category

Crew overboard / MOB alerts

On a phone the comparison grid is replaced by the verdicts below, one per app, which carry the same marks in words. The grid is there on a wider screen.

The specialists that document the most of this table: OLAS: Wireless Marine Safety / OLAS Marine – MOB Alert, ACR OLAS: Marine Alert System and OLAS N2K. What the Galvanic Sailing app documents that the others mostly do not: Alerts spoken aloud (documented, fully or in part, by 1 of 13 others); Pets can be monitored too (documented, fully or in part, by 2 of 13 others); Whole-boat coverage with more than one receiver (documented, fully or in part, by 2 of 13 others).

13 apps compared with ours on 15 features.

Man overboard, on the Galvanic Voice product page

No button to press. When a Galvanic Pulse bracelet goes unheard while the boat is under way, Galvanic Voice raises the man overboard alarm by itself, then keeps speaking the relative bearing and distance: “Emergency. Peter overboard. Relative bearing 150 degrees. 40 meters.” The product page lets you hear it.

Hear the man overboard alarm

App	Alerts spoken aloud	Alarm sounds from hardware aboard, not the phone	No subscription	Every phone and tablet, no per-device fee	Works offline aboard	Automatic detection by wearable	MOB position recording	Return-to-point guidance	Man overboard from AIS or DSC	Man overboard and its position seen ashore	Works without a phone	Engine kill switch	Text message ashore when sailing solo	Pets can be monitored too	Whole-boat coverage with more than one receiver	Price, as published
Galvanic Sailing appGalvanic Works S.L. · Android 7.0+ on Google Play; iOS 15.5+ on the App Store; phones and tablets	✔	✔	✔	✔	✔	✔	✔	✔	~	✔	✔	✘	✘	✔	✔	free to download; the full app with a Galvanic Voice aboard · Galvanic Voice €1,149.50 incl. 21% Spanish VAT (€950 ex-VAT) · chart, weather and position free on any phone, and a guided tour and simulation of every tab; no subscription; official nautical charts, when offered, will be a paid extra charged per boat
1st MateMercury Marine LLC · iOS; Android	✘	✔	✔	~	~	✔	✔	✔	?	~	~	✔	?	?	✘	free app, paid hardware · USD 299.99 to 494.99 for the Mercury SmartCraft kit; 299.99 to 329.99 for other engine brands; passenger fob from 89.99 (mercurymarine.com)
ACR OLAS: Marine Alert SystemUltimate Sports Engineering Ltd (ACR Electronics brand) · iOS; Android	✘	✔	✔	✔	✔	✔	✔	✔	?	✔	✔	✔	✔	✔	✔	free app · in euros: OLAS Tag €65 (olasmarine.com)
Alerte Secours SNSM (Anchor Alarm & Emergency Tides)X Labs Mobile · Android	✘	✘	✔	~	?	✘	✔	?	?	?	✘	?	?	?	✘	free
Boat BeaconPocket Mariner Ltd. · iOS; iPadOS; watchOS; macOS (Apple silicon); Android	✘	✘	✔	~	~	✘	~	~	✔	?	✘	?	?	?	✘	one-off + optional subscription · in euros: €17.99, Anchor Watch and Man Overboard €5.99 (App Store, Germany) · App USD 14.99 one-off (App Store US); AIS Sharing subscription USD 5.99 monthly or USD 16.49 yearly; add-ons: Live View Upgrade USD 7.99, Anchor Watch and Man Overboard USD 4.99, NOAA US Marine Charts USD 9.99, UK & IE Marine Charts USD 12.99
Garmin OnBoardGarmin International Inc. (Olathe, Kansas, USA; parent Garmin Ltd., Switzerland) · dedicated hardware; user interface is a compatible Garmin chartplotter. No phone or tablet app.	✘	✔	✔	?	✔	✔	✔	✔	?	?	?	✔	?	?	?	one-off purchase, no subscription · USD 499.99 system; GOS 10 hub alone USD 399.99; extra tag USD 149.99. Chartplotter extra, roughly USD 1,000 to 10,199.99.
moodSailorSociété Française d'Infonuagique (France) · iOS 15.0+; Android	✘	✘	✔	✔	✔	?	✔	✔	?	?	?	?	?	?	?	free · No price published anywhere, in any currency. Free on both stores, no in-app purchase, no subscription, no pro tier, no ads. Maker: "The whole app, all of its features, for free." AIS arrives free over community networks (aisstream.io, pelyr.com).
OLAS N2KOlas Marine / Exposure Marine (Ultimate Sports Engineering Ltd), Bury, West Sussex, UK · dedicated NMEA 2000 hub with a hard-wired control switch. Setup uses the free OLAS mobile app (iOS, Android), the same app as the phone-based OLAS entries.	✘	✔	✔	?	✔	✔	✔	✔	~	✔	✔	✔	~	?	?	one-off purchase, no subscription · in euros: OLAS N2K €335 (olasmarine.com) · GBP 375.00 UK; USD 300.00 US; EUR 335.00 DE. Extra tags GBP 50 / T2 GBP 65 / 4-pack GBP 180; N2K T-connector GBP 20; Extender GBP 100.
OLAS: Wireless Marine Safety / OLAS Marine – MOB AlertUltimate Sports Engineering Ltd (Olas Marine / Exposure Marine, UK) · iOS; Android; macOS (Apple silicon)	✘	✔	✔	✔	✔	✔	✔	✔	~	✔	✔	✔	✔	✔	✔	free app · in euros: OLAS Tag €65 (olasmarine.com) · OLAS Tag £50; OLAS T2 £65; OLAS Tag 4 Pack £180; OLAS Core £110; OLAS Extender £100; OLAS Float-On £110; OLAS Guardian £270; OLAS Guardian and T2 £275; OLAS N2K £375 (GBP, olasmarine.com) · app free
OrcaOrca Technologies AS · iOS; iPadOS; watchOS; macOS (Apple M1 or later); Android; Orca Display	✘	✘	?	✔	~	✘	✔	✔	?	✘	✔	?	?	?	✘	subscription · Orca Core 2 EUR 649; Orca Display 2 EUR 999; Charging Mount EUR 349 (getorca.com configurator, delivery to Europe) · Orca Plus EUR 49/year; Orca Smart Navigation EUR 149/year (help centre); App Store US in-app purchase list: Orca Plus USD 44.99, Orca Smart Navigation USD 159.99 and USD 89.99, Orca Subscription USD 129.00 (billing period not stated)
PredictWind Man OverboardPredictWind · watchOS (Apple Watch, available); iPhone (pending Apple review); Android (in development) – beta	✘	✔	✘	~	✔	✔	✔	~	~	✔	~	?	✔	?	✘	subscription · DataHub Pro $599 (USD, predictwind.com) · PredictWind Professional required: $499/year (USD). Other tiers: Free $0; Basic $29/year; Standard $249/year
Salt & Wire CompanionMaciej Jan Karnowski, trading as Salt & Wire (Poland) · Android 7.0+ only; iOS in preparation, no date	✘	✘	~	✔	?	✘	✔	✔	?	?	✘	?	?	?	✘	freemium · PLUS subscription, Google Play, three-day trial; no labelled price published. Google's in-app purchase range for the listing is EUR 9.49 to EUR 28.99, not confirmed as the PLUS price
SeaNavPocket Mariner Ltd. · iOS; iPadOS; watchOS; macOS (Apple silicon)	~	✘	✘	✔	✔	✘	~	~	?	✘	✘	?	?	?	✘	freemium · in euros: Man Overboard and Anchor Watch €5.99, Pro features €10.99 (App Store, Italy) · In-app (US App Store), described by the maker as 1-year auto-renewing subscriptions, not one-off: Man Overboard & Anchor Watch $4.99; Pro Features $10.49-$14.99; charts $9.99-$26.99; Weather charts $4.99
Skipper: Boat & Sailing LogIvpeSoft · Android	✘	✘	✔	~	✔	✘	✔	✔	?	✘	✘	?	?	?	✘	free

The verdicts, one by one (14)

Documented

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Automatic detection by wearable
MOB position recording
Return-to-point guidance
Man overboard and its position seen ashore
Works without a phone
Pets can be monitored too
Whole-boat coverage with more than one receiver

Documented, with a limit

Man overboard from AIS or DSC

Established absent

Engine kill switch
Text message ashore when sailing solo

The maker does not say

none

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: free to download: chart, weather and position on any phone, and a guided tour and simulation of every tab (manual §38 and §40; store listing); the full app needs a Galvanic Voice aboard
Wearable: Galvanic Pulse bracelet (up to 16 per vessel): IP67 BLE 5.0 wristband with vibration motor, buzzer, LED and one button. Does: man-overboard alert when unheard for longer than the captain-set delay (from 10 s to 10 min, default 60 s) while under way; 'has left the boat' notice at anchor or in harbour; watch-reminder vibration with triple-tap acknowledge; rest and activity detection feeding the fatigue model (§27); can be paired to equipment such as a harness. Battery about 2 months, charges from USB. Limits: bodies, metal bulkheads, engine rooms and aluminium or steel hulls attenuate the BLE signal, so a sleeper lying on the arm can go unheard; every phone and tablet aboard with the Galvanic Sailing app acts as an extra listener for the Galvanic Pulse bracelets (Galvanic Pulse listening, §30). One Galvanic Voice is loud enough to wake the whole boat. People add more for convenience: with a unit close by, an alert can be silenced with a wave of the hand past it, wherever they are aboard. Range in metres not given in the manual. Manual describes no smartwatch app. (manual §23 to §34)
How it detects someone overboard: BLE bracelet signal loss, heard by the Galvanic Voice units aboard
Boat or hull limits: No size or hull limit stated. Metal hulls and bulkheads attenuate BLE, and every phone and tablet aboard with the Galvanic Sailing app acts as an extra listener for the bracelets (Galvanic Pulse listening, §30)

1st Matefree app, paid hardware · USD 299.99 to 494.99 for the Mercury SmartCraft kit; 299.99 to 329.99 for other engine brands; passenger fob from 89.99 (mercurymarine.com)

Documented

Alarm sounds from hardware aboard, not the phone
No subscription
Automatic detection by wearable
MOB position recording
Return-to-point guidance
Engine kill switch

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard
Man overboard and its position seen ashore
Works without a phone

Established absent

Alerts spoken aloud
Whole-boat coverage with more than one receiver

The maker does not say

Man overboard from AIS or DSC
Text message ashore when sailing solo
Pets can be monitored too

Alarm runs on: the app and a device fitted aboard
Free tier: free app (no paid tier)
Wearable: 1st Mate wearable fob, up to 8 people: MOB event turns the engine off or sounds an alarm and optionally notifies emergency contacts; if the fob is out of range the system disables the engine or puts it in guardian mode (theft deterrent).
How it detects someone overboard: Wearable fob out of proximity of the engine-integrated system

Sources: [1] [2] [3]

ACR OLAS: Marine Alert Systemfree app · in euros: OLAS Tag €65 (olasmarine.com)

Documented

Alarm sounds from hardware aboard, not the phone
No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Automatic detection by wearable
MOB position recording
Return-to-point guidance
Man overboard and its position seen ashore
Works without a phone
Engine kill switch
Text message ashore when sailing solo
Pets can be monitored too
Whole-boat coverage with more than one receiver

Established absent

Alerts spoken aloud

The maker does not say

Man overboard from AIS or DSC

Alarm runs on: the app and a device fitted aboard
Alerts ashore: SMS
Free tier: free app (no paid tier)
Wearable: ACR OLAS Tag (EXPOLASTAG): BLE tag on silicone wrist strap (fits 130-220 mm) or lifejacket, for adults, children and pets. Battery CR2477 user-replaceable, up to 4 months / 3,500 h continuous when armed, about 3 months on average (FAQ). IP67, waterproof to 2 m, not buoyant. Does: no GPS in the tag; the phone app sounds a loud alarm within 8 s of losing the tag (submerged about 4 in, or out of range), stores the phone's GPS point and guides back; with Core/Guardian the alarm is within 2 s. Limits: app-only tracking rated for vessels up to 30 ft (FAQ) or 40 ft / 12 m (spec sheet); max 6 tags per phone, a 7th can cause false alerts; no other Bluetooth device may be connected to the phone; carbon, metal or water block the signal; tag cannot be switched off from the app. ACR OLAS Float-On (water-activated USB-rechargeable torch) also offered. No smartwatch app stated.
How it detects someone overboard: BLE tag / Float-On signal loss (virtual tether) to the phone app, or to Core / Guardian / Extender receivers
Boat or hull limits: App only: up to 30 ft (FAQ) / 40 ft, 12 m (spec). Core or Guardian: up to 50 ft. Extender: up to 80 ft (spec) / 100 ft (FAQ). Carbon, metal or water block the signal.

Sources: [1] [2] [3] [4] [5] [6] [7]

Alerte Secours SNSM (Anchor Alarm & Emergency Tides)free

Documented

No subscription
MOB position recording

Documented, with a limit

Every phone and tablet, no per-device fee

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Automatic detection by wearable
Works without a phone
Whole-boat coverage with more than one receiver

The maker does not say

Works offline aboard
Return-to-point guidance
Man overboard from AIS or DSC
Man overboard and its position seen ashore
Engine kill switch
Text message ashore when sailing solo
Pets can be monitored too

Alarm runs on: the phone, tablet or computer running the app
Free tier: free app with ads (no in-app purchases shown)
Wearable: none stated
How it detects someone overboard: manual button only

Sources: [1] [2]

Documented

No subscription
Man overboard from AIS or DSC

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard
MOB position recording
Return-to-point guidance

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Automatic detection by wearable
Works without a phone
Whole-boat coverage with more than one receiver

The maker does not say

Man overboard and its position seen ashore
Engine kill switch
Text message ashore when sailing solo
Pets can be monitored too

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: email
Free tier: no free tier (paid app $14.99; MOB is a $4.99 IAP)
Wearable: Apple Watch app included free: compass, SOG, COG, HDG, AIS, MOB, countdown timer and torch; vendor says AIS collision detection, man overboard alerts and navigation tools 'run directly on the Apple Watch'. Range, battery and whether an iPhone must be nearby not stated. No dedicated tag.
How it detects someone overboard: manual button only

Sources: [1] [2] [3] [4] [5]

Garmin OnBoardone-off purchase, no subscription · USD 499.99 system; GOS 10 hub alone USD 399.99; extra tag USD 149.99. Chartplotter extra, roughly USD 1,000 to 10,199.99.

Documented

Alarm sounds from hardware aboard, not the phone
No subscription
Works offline aboard
Automatic detection by wearable
MOB position recording
Return-to-point guidance
Engine kill switch

Established absent

Alerts spoken aloud

The maker does not say

Every phone and tablet, no per-device fee
Man overboard from AIS or DSC
Man overboard and its position seen ashore
Works without a phone
Text message ashore when sailing solo
Pets can be monitored too
Whole-boat coverage with more than one receiver

Alarm runs on: a device fitted aboard
How it detects someone overboard: wireless tag signal loss to the hub

Sources: [1] [2]

Documented

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
MOB position recording
Return-to-point guidance

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone

The maker does not say

Automatic detection by wearable
Man overboard from AIS or DSC
Man overboard and its position seen ashore
Works without a phone
Engine kill switch
Text message ashore when sailing solo
Pets can be monitored too
Whole-boat coverage with more than one receiver

Alarm runs on: the phone, tablet or computer running the app
Free tier: everything, free

Sources: [1] [2]

OLAS N2Kone-off purchase, no subscription · in euros: OLAS N2K €335 (olasmarine.com) · GBP 375.00 UK; USD 300.00 US; EUR 335.00 DE. Extra tags GBP 50 / T2 GBP 65 / 4-pack GBP 180; N2K T-connector GBP 20; Extender GBP 100.

Documented

Alarm sounds from hardware aboard, not the phone
No subscription
Works offline aboard
Automatic detection by wearable
MOB position recording
Return-to-point guidance
Man overboard and its position seen ashore
Works without a phone
Engine kill switch

Documented, with a limit

Man overboard from AIS or DSC
Text message ashore when sailing solo

Established absent

Alerts spoken aloud

The maker does not say

Every phone and tablet, no per-device fee
Pets can be monitored too
Whole-boat coverage with more than one receiver

Alarm runs on: the app and a device fitted aboard
Alerts ashore: Solo Mode SMS from the paired phone to one pre-set number (vessel name, time, GPS, callback), and a manual SMS from the MOB screen. Needs the OLAS app running on a phone with at least 2G. No satellite, no DSC, no shore service.
How it detects someone overboard: wireless tag signal loss to the hub

Sources: [1] [2] [3]

OLAS: Wireless Marine Safety / OLAS Marine – MOB Alertfree app · in euros: OLAS Tag €65 (olasmarine.com) · OLAS Tag £50; OLAS T2 £65; OLAS Tag 4 Pack £180; OLAS Core £110; OLAS Extender £100; OLAS Float-On £110; OLAS Guardian £270; OLAS Guardian and T2 £275; OLAS N2K £375 (GBP, olasmarine.com) · app free

Documented

Alarm sounds from hardware aboard, not the phone
No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Automatic detection by wearable
MOB position recording
Return-to-point guidance
Man overboard and its position seen ashore
Works without a phone
Engine kill switch
Text message ashore when sailing solo
Pets can be monitored too
Whole-boat coverage with more than one receiver

Documented, with a limit

Man overboard from AIS or DSC

Established absent

Alerts spoken aloud

The maker does not say

none

Alarm runs on: the app and a device fitted aboard
Alerts ashore: SMS
Free tier: free app (no paid tier)
Wearable: OLAS T2: USB-rechargeable waterproof tag, 7-day continuous runtime, vibration and light status, low-battery vibration below 20%, wrist strap or safety-break neck lanyard; GBP 65. OLAS Tag: CR2477 replaceable battery, 90 days continuous runtime, wrist strap, clip or lifejacket, for adults, children, pets and objects; 4-pack GBP 180 (sold out). Does: automatic, no button; separation for more than a few seconds triggers the onboard alarm, engine stop (with Guardian/N2K) and GPS logging in the app; hubs react in about 2-4 s. Limits: range 'vessel-wide coverage (system dependent)'; phone-only tracking up to 4 transmitters on vessels up to 30 ft (product pages) or 35 ft (Play); OLAS Float-On also supported. No smartwatch app stated.
How it detects someone overboard: BLE tag signal loss (T2, Tag, Float-On) to the phone app or to Core / Guardian / N2K hubs
Boat or hull limits: Phone only: up to 30 ft (product pages) / 35 ft (Play). Core or Guardian: up to 50 ft, 25 transmitters. N2K: up to 100 ft, 25 transmitters.

Sources: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14]

Documented

Every phone and tablet, no per-device fee
MOB position recording
Return-to-point guidance
Works without a phone

Documented, with a limit

Works offline aboard

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Automatic detection by wearable
Man overboard and its position seen ashore
Whole-boat coverage with more than one receiver

The maker does not say

No subscription
Man overboard from AIS or DSC
Engine kill switch
Text message ashore when sailing solo
Pets can be monitored too

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: push
Free tier: free app: online charts, instruments, autopilot control and radar overlay (with Core), Internet AIS, 5-day weather, 50 NM engine routing, 7-day logbook; offline charts need Orca Plus
Wearable: Apple Watch app (watchOS 9.0+). The manual says the Core lets you control your autopilot wirelessly from phone, tablet and Apple Watch, so this needs an Orca Core. No other watch functions described.
How it detects someone overboard: manual button only

Sources: [1] [2] [3] [4] [5] [6] [7] [8]

PredictWind Man Overboardsubscription · DataHub Pro $599 (USD, predictwind.com) · PredictWind Professional required: $499/year (USD). Other tiers: Free $0; Basic $29/year; Standard $249/year

Documented

Alarm sounds from hardware aboard, not the phone
Works offline aboard
Automatic detection by wearable
MOB position recording
Man overboard and its position seen ashore
Text message ashore when sailing solo

Documented, with a limit

Every phone and tablet, no per-device fee
Return-to-point guidance
Man overboard from AIS or DSC
Works without a phone

Established absent

Alerts spoken aloud
No subscription
Whole-boat coverage with more than one receiver

The maker does not say

Engine kill switch
Pets can be monitored too

Alarm runs on: the app and a device fitted aboard
Alerts ashore: SMS, email
Free tier: no free tier (MOB needs DataHub Pro and PredictWind Professional)
Wearable: Apple Watch app (beta; tested and approved: Watch Ultra 3, Watch 11 on watchOS 26.6, Watch 9 on 27.0 beta). Does: with Monitoring on, the watch keeps a Wi-Fi link to DataHub Pro; if the link drops the watch alerts at once, other crew devices after about 10-30 s, full MOB alert about 60 s (MOB point to NMEA 2000 chartplotter), SMS and email ashore about 120 s. Limits: Bluetooth must be disabled on the watch for reliable Wi-Fi reconnection; a flat watch battery, leaving DataHub Wi-Fi or auto-joining another network raise a MOB alert; Wear OS (Galaxy, Pixel) under testing, Garmin (Forerunner 245, vivoactive 5, fenix 8) planned, neither approved; iPhone app pending Apple review; range not stated.
How it detects someone overboard: Crew phone or smartwatch losing its Wi-Fi link to DataHub Pro

Sources: [1] [2] [3] [4] [5] [6] [7] [8]

Documented

Every phone and tablet, no per-device fee
MOB position recording
Return-to-point guidance

Documented, with a limit

No subscription

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Automatic detection by wearable
Works without a phone
Whole-boat coverage with more than one receiver

The maker does not say

Works offline aboard
Man overboard from AIS or DSC
Man overboard and its position seen ashore
Engine kill switch
Text message ashore when sailing solo
Pets can be monitored too

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2]

SeaNavfreemium · in euros: Man Overboard and Anchor Watch €5.99, Pro features €10.99 (App Store, Italy) · In-app (US App Store), described by the maker as 1-year auto-renewing subscriptions, not one-off: Man Overboard & Anchor Watch $4.99; Pro Features $10.49-$14.99; charts $9.99-$26.99; Weather charts $4.99

Documented

Every phone and tablet, no per-device fee
Works offline aboard

Documented, with a limit

Alerts spoken aloud
MOB position recording
Return-to-point guidance

Established absent

Alarm sounds from hardware aboard, not the phone
No subscription
Automatic detection by wearable
Man overboard and its position seen ashore
Works without a phone
Whole-boat coverage with more than one receiver

The maker does not say

Man overboard from AIS or DSC
Engine kill switch
Text message ashore when sailing solo
Pets can be monitored too

Alarm runs on: the phone, tablet or computer running the app
Free tier: free version includes all navigation and trip planning tools; charts, AIS, MOB and anchor alarm are in-app purchases
Wearable: Apple Watch app included free: speed, course, waypoint distance, bearing and time, compass, wind gauge, live AIS radar map, race countdown timer, night-mode torch; can start sailing mode from the watch. MOB on the watch not stated. No dedicated tag.
How it detects someone overboard: manual button only

Sources: [1] [2]

Skipper: Boat & Sailing Logfree

Documented

No subscription
Works offline aboard
MOB position recording
Return-to-point guidance

Documented, with a limit

Every phone and tablet, no per-device fee

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Automatic detection by wearable
Man overboard and its position seen ashore
Works without a phone
Whole-boat coverage with more than one receiver

The maker does not say

Man overboard from AIS or DSC
Engine kill switch
Text message ashore when sailing solo
Pets can be monitored too

Alarm runs on: the phone, tablet or computer running the app
Free tier: free app (no paid tier)
Wearable: none stated
How it detects someone overboard: manual button only

Sources: [1] [2] [3]

Category

Voice & audio alerts

On a phone the comparison grid is replaced by the verdicts below, one per app, which carry the same marks in words. The grid is there on a wider screen.

The specialists that document the most of this table: Signal K Notification Player (plugin), Vesper Cortex (Cortex Onboard / Cortex Monitor) and Voice Sail Start Timer. What the Galvanic Sailing app documents that the others mostly do not: Alarm sounds through silent and Do Not Disturb (documented, fully or in part, by 2 of 17 others).

17 apps compared with ours on 10 features.

App	Alarm sounds from hardware aboard, not the phone	No subscription	Every phone and tablet, no per-device fee	Works offline aboard	Spoken (voice) alerts	Configurable alarm thresholds	Multilingual voice	Works with screen off / in background	Speaks information	Alarm sounds through silent and Do Not Disturb	Price, as published
Galvanic Sailing appGalvanic Works S.L. · Android 7.0+ on Google Play; iOS 15.5+ on the App Store; phones and tablets	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	free to download; the full app with a Galvanic Voice aboard · Galvanic Voice €1,149.50 incl. 21% Spanish VAT (€950 ex-VAT) · chart, weather and position free on any phone, and a guided tour and simulation of every tab; no subscription; official nautical charts, when offered, will be a paid extra charged per boat
Anchor Alert (PredictWind)PredictWind Limited · iOS; iPadOS; visionOS	✔	~	~	~	✘	✔	✘	✔	✘	✔	freemium · DataHub US$299; DataHub Pro US$599; NMEA 2000 M12 Cable Pack US$49; DataHub Pro LTE plan $10 USD/month; DataHub Pro Starlink DTC plan $15 USD/month · Free $0 (anchor drag & swing alerts, anchor data dashboard). Anchor Alert Pro: US App Store Anchor Pro 1 monthly $15.00; Anchor Pro 3 monthly $29.00; Anchor Pro Yearly $99.00 (USD). Website: $15 USD/month monthly; $9.66 USD/month ($29 billed 3 monthly). Included free with PredictWind Pro forecast subscription
Aqua Map BoatingGEC s.r.l. · iOS; iPadOS; macOS (Apple silicon)	✘	~	~	✔	~	✔	?	?	✔	?	subscription · in euros: Expert €14.99, Master €24.99, chart regions from €14.99 (App Store, Germany) · Chart subscription per region, 1 year (App Store US list, USD): US & Canada nautical charts 14.99 and 49.99; US – Nautical & Lakes charts 9.99; Canada 9.99; Bermuda 14.99; Caribbean South 14.99; Bahamas Explorer Charts 49.99; Bahamas Explorer Chartbooks 139.99. Expert: nautical chart cost + USD 14.99/year; Master (USA & Canada only): nautical chart cost + USD 24.99/year (aquamap.app). 14-day free trial
Boat BeaconPocket Mariner Ltd. · iOS; iPadOS; watchOS; macOS (Apple silicon); Android	✘	✔	~	~	✘	✔	✘	✔	?	✔	one-off + optional subscription · in euros: €17.99, Anchor Watch and Man Overboard €5.99 (App Store, Germany) · App USD 14.99 one-off (App Store US); AIS Sharing subscription USD 5.99 monthly or USD 16.49 yearly; add-ons: Live View Upgrade USD 7.99, Anchor Watch and Man Overboard USD 4.99, NOAA US Marine Charts USD 9.99, UK & IE Marine Charts USD 12.99
BoatspeedHans Joachim Herbertz · Android	✘	~	~	~	✘	~	✘	~	✔	?	freemium · One year ad-free: about 2 euro; Ad-free forever: about 8 euro; paid maps: about 3 euro a year; Anchor Alert To Go licence: about 2 euro for 30 days (all depending on country and currency)
Exocet VoicePixel sur Mer · dedicated NMEA 2000 box; works alongside any Exocet unit	✔	✔	?	?	✔	?	✔	✔	~	?	one-off · price not published on the maker's pages (checked 5 Oct 2026)
i-Boating: Marine Charts & GPSBist LLC · iOS; iPadOS; Android	✘	✔	✔	✔	✔	✘	✘	?	✔	?	freemium · App Store US in-app purchases: USA – Marine Charts $19.99; other USA chart/fishing IAP listed at $19.99, $20.99, $21.99, $23.99, $24.99, $29.99; listing states maps include unlimited updates for 1 year
Maretron N2KViewMaretron, now under Raymarine / Teledyne FLIR (store listings name Raymarine UK Limited; maretron.com still carries the Maretron brand, Jupiter, Florida) · PC; Mac; Maretron MBB300C, TSM800/800C/810C/1330/1330C; iPhone; iPad; Android	✔	?	?	✔	✘	✔	✘	✘	?	?	app free; gateway, licences and modules sold through dealers · Maretron's product pages show no prices and sell licence keys 'via our dealer network'; its own 2023 US list price PDF (maretron.com, Maretron Brand Price List 7.1.23) gives the IPG100 gateway at $709 and N2KView for a PC at $695, and N2KView Mobile is free.
navCenterGuardian Digital Ltd · iOS; iPadOS; watchOS; macOS (Apple silicon)	✘	✔	~	✔	~	~	~	~	~	?	freemium · App Store US: permanent licence (Purchased) $34.99 one-off; Subscribed annually $14.99 per year; licence or subscription needed to connect to vessel data
NMEAremotezapfware · iOS (iPhone, iPad, Apple Watch)	✘	✔	~	✔	✘	✔	✘	?	~	?	one-off · in euros: €24.99 (App Store, Germany) · USD 23.99 one-off, no subscriptions (App Store US); NMEAremote LITE USD 3.99
OLAS N2KOlas Marine / Exposure Marine (Ultimate Sports Engineering Ltd), Bury, West Sussex, UK · dedicated NMEA 2000 hub with a hard-wired control switch. Setup uses the free OLAS mobile app (iOS, Android), the same app as the phone-based OLAS entries.	✔	✔	?	✔	✘	✔	✘	✔	?	?	one-off purchase, no subscription · in euros: OLAS N2K €335 (olasmarine.com) · GBP 375.00 UK; USD 300.00 US; EUR 335.00 DE. Extra tags GBP 50 / T2 GBP 65 / 4-pack GBP 180; N2K T-connector GBP 20; Extender GBP 100.
SailTimer Wind Gauge (Audio Navigation)SailTimer Inc. · Android	✘	✔	✔	✔	✔	~	✘	✘	✔	?	free app · SailTimer Wind Instrument €305.19 (wi-rb.com store, EUR as displayed) · SailTimer Wind Instrument US$349.99 (wi-rb.com base price, VAT not included)
SEAiqSakhalin, LLC · iOS (iPhone, iPad)	✘	✘	~	✔	✔	✔	✔	~	~	✘	subscription · SEAiq: USD 15/year; SEAiq USA: USD 10/year (seaiq.com); App Store US: Premium Annual USD 15.00; legacy one-time Upgrade for Premium Features USD 49.99
Signal K Notification Player (plugin)David Sanner (open source) · Signal K server plugin + web app (browser playback on phone/tablet)	✔	✔	✔	✔	✔	✔	✘	✔	~	?	free app
SmartboatiaSmartboatia · Hub hardware + mobile app (app OS not stated on pages read)	✔	✔	~	✔	✘	~	✘	✔	✘	?	freemium · €999.00 incl. 1 year Standard subscription + free EU shipping · Works without subscription. Standard subscription: from €9.99 a month; billing every 3 months or annual (save 25%); 1-year Standard valued at €119.99
Vesper Cortex (Cortex Onboard / Cortex Monitor)Garmin New Zealand Ltd (Vesper Marine) · NMEA 2000 and NMEA 0183 hub with built-in WiFi for up to 10 devices; iOS and Android apps	✔	~	✔	✔	✔	✔	?	✔	?	?	freemium · Cortex M1 Hub $1,449.99 USD; Cortex V1 Hub $1,999.99 USD (garmin.com US) · Cortex Monitoring Plan (US): Free Plan (Monitor Lite); Monthly Plan $19.95 USD; Annual Plan $159.95 USD per year. US prices exclude state/local taxes; non-US prices include VAT; auto-renew
Voice Sail Start TimerEgor Leonenko · iOS; iPadOS; Android	✘	✔	✔	?	✔	~	✔	✔	✔	?	free
WATCHIT (Sense / Eye)WATCHIT · installed system reading existing GPS, AIS, depth, engine and autopilot data; companion phone app	✔	?	?	?	✔	✘	?	✔	?	?	quote on request

The verdicts, one by one (18)

Documented

Alarm sounds from hardware aboard, not the phone
No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Spoken (voice) alerts
Configurable alarm thresholds
Multilingual voice
Works with screen off / in background
Speaks information
Alarm sounds through silent and Do Not Disturb

Established absent

none

The maker does not say

none

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: free to download: chart, weather and position on any phone, and a guided tour and simulation of every tab (manual §38 and §40; store listing); the full app needs a Galvanic Voice aboard
Wearable: Galvanic Pulse bracelet (up to 16 per vessel): IP67 BLE 5.0 wristband with vibration motor, buzzer, LED and one button. Does: man-overboard alert when unheard for longer than the captain-set delay (from 10 s to 10 min, default 60 s) while under way; 'has left the boat' notice at anchor or in harbour; watch-reminder vibration with triple-tap acknowledge; rest and activity detection feeding the fatigue model (§27); can be paired to equipment such as a harness. Battery about 2 months, charges from USB. Limits: bodies, metal bulkheads, engine rooms and aluminium or steel hulls attenuate the BLE signal, so a sleeper lying on the arm can go unheard; every phone and tablet aboard with the Galvanic Sailing app acts as an extra listener for the Galvanic Pulse bracelets (Galvanic Pulse listening, §30). One Galvanic Voice is loud enough to wake the whole boat. People add more for convenience: with a unit close by, an alert can be silenced with a wave of the hand past it, wherever they are aboard. Range in metres not given in the manual. Manual describes no smartwatch app. (manual §23 to §34)

Documented

Alarm sounds from hardware aboard, not the phone
Configurable alarm thresholds
Works with screen off / in background
Alarm sounds through silent and Do Not Disturb

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Works offline aboard

Established absent

Spoken (voice) alerts
Multilingual voice
Speaks information

The maker does not say

none

Alarm runs on: the app and a device fitted aboard
Alerts ashore: push
Free tier: Anchor Alert Free: drag and swing alerts from the phone's GPS while on board; everything else (instrument, AIS and remote alerts) needs Anchor Alert Pro
Wearable: Apple Watch: no watch app stated; iOS mirrors alerts to the watch with a vibration and a light ringtone that is 'difficult to hear', and the vendor advises turning watch notifications off so alerts play loudly on the iPhone.

Sources: [1] [2] [3] [4] [5] [6] [7] [8]

Documented

Works offline aboard
Configurable alarm thresholds
Speaks information

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Spoken (voice) alerts

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Multilingual voice
Works with screen off / in background
Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: email, Telegram
Free tier: free download: route planning, track recording, tides and currents, anchor alarm, community; official charts need a chart subscription
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

Documented

No subscription
Configurable alarm thresholds
Works with screen off / in background
Alarm sounds through silent and Do Not Disturb

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard

Established absent

Alarm sounds from hardware aboard, not the phone
Spoken (voice) alerts
Multilingual voice

The maker does not say

Speaks information

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: email
Free tier: no free tier (paid app $14.99 on iOS)
Wearable: Apple Watch app included free: compass, SOG, COG, HDG, AIS, MOB, countdown timer and torch; vendor says AIS collision detection and man overboard alerts 'run directly on the Apple Watch'. Range, battery and iPhone dependence not stated.

Sources: [1] [2] [3] [4] [5] [6]

Boatspeedfreemium · One year ad-free: about 2 euro; Ad-free forever: about 8 euro; paid maps: about 3 euro a year; Anchor Alert To Go licence: about 2 euro for 30 days (all depending on country and currency)

Documented

Speaks information

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Configurable alarm thresholds
Works with screen off / in background

Established absent

Alarm sounds from hardware aboard, not the phone
Spoken (voice) alerts
Multilingual voice

The maker does not say

Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: push
Free tier: free with ads: sailing view, anchor alert, OpenStreetMap and satellite maps; paid: ad removal (about 2 or 8 EUR), extra maps (about 3 EUR/year), Anchor Alert To Go (about 2 EUR per 30 days)
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

Exocet Voiceone-off · price not published on the maker's pages (checked 5 Oct 2026)

Documented

Alarm sounds from hardware aboard, not the phone
No subscription
Spoken (voice) alerts
Multilingual voice
Works with screen off / in background

Documented, with a limit

Speaks information

Established absent

none

The maker does not say

Every phone and tablet, no per-device fee
Works offline aboard
Configurable alarm thresholds
Alarm sounds through silent and Do Not Disturb

Alarm runs on: a device fitted aboard

Sources: [1] [2] [3]

i-Boating: Marine Charts & GPSfreemium · App Store US in-app purchases: USA – Marine Charts $19.99; other USA chart/fishing IAP listed at $19.99, $20.99, $21.99, $23.99, $24.99, $29.99; listing states maps include unlimited updates for 1 year

Documented

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Spoken (voice) alerts
Speaks information

Established absent

Alarm sounds from hardware aboard, not the phone
Configurable alarm thresholds
Multilingual voice

The maker does not say

Works with screen off / in background
Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app
Free tier: free download; charts sold as in-app purchases with 1 year of updates; what the free version shows is not stated
Wearable: none stated

Sources: [1] [2] [3] [4]

Documented

Alarm sounds from hardware aboard, not the phone
Works offline aboard
Configurable alarm thresholds

Established absent

Spoken (voice) alerts
Multilingual voice
Works with screen off / in background

The maker does not say

No subscription
Every phone and tablet, no per-device fee
Speaks information
Alarm sounds through silent and Do Not Disturb

Alarm runs on: a device fitted aboard
Alerts ashore: E-mail and SMS off the boat, plus live remote screens over the vessel's own internet link (Real Time Cloud Service). Maker: 'marina WiFi, satellite connection, GSM or cell phone modem'.
Free tier: app free, gateway and licences extra

Sources: [1] [2] [3]

navCenterfreemium · App Store US: permanent licence (Purchased) $34.99 one-off; Subscribed annually $14.99 per year; licence or subscription needed to connect to vessel data

Documented

No subscription
Works offline aboard

Documented, with a limit

Every phone and tablet, no per-device fee
Spoken (voice) alerts
Configurable alarm thresholds
Multilingual voice
Works with screen off / in background
Speaks information

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app
Free tier: free download runs without time limit in simulation mode; a licence ($34.99) or subscription ($14.99/year) is needed to connect to vessel data
Wearable: Apple Watch companion app: up to 15 pages of navigation data (depth, speed, compass with COG/BTW), autopilot Standby/Auto/Track and course control with audio and haptic confirmation of any pilot change. Limits: the watch cannot access TCP/UDP, so it must be paired with an iPhone (or iConnect Server) running navCenter; iOS may stop navCenter in the background if the iPhone battery is below 20% or the phone is busy.

Sources: [1] [2] [3] [4] [5] [6] [7] [8]

NMEAremoteone-off · in euros: €24.99 (App Store, Germany) · USD 23.99 one-off, no subscriptions (App Store US); NMEAremote LITE USD 3.99

Documented

No subscription
Works offline aboard
Configurable alarm thresholds

Documented, with a limit

Every phone and tablet, no per-device fee
Speaks information

Established absent

Alarm sounds from hardware aboard, not the phone
Spoken (voice) alerts
Multilingual voice

The maker does not say

Works with screen off / in background
Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app
Free tier: no free tier ($23.99 one-off, no subscription)
Wearable: Native Apple Watch app (watchOS 8+), release notes 3.0.21: 'Runs independently from iPhone', HTTP(S) client, improved connectivity; watch dashboard import and app-shortcut complication. Also ActiveLook smart glasses for heads-up data. Whether alarms show on the watch is not stated.

Sources: [1] [2] [3]

Documented

Alarm sounds from hardware aboard, not the phone
No subscription
Works offline aboard
Configurable alarm thresholds
Works with screen off / in background

Established absent

Spoken (voice) alerts
Multilingual voice

The maker does not say

Every phone and tablet, no per-device fee
Speaks information
Alarm sounds through silent and Do Not Disturb

Alarm runs on: the app and a device fitted aboard
Alerts ashore: Solo Mode SMS from the paired phone to one pre-set number (vessel name, time, GPS, callback), and a manual SMS from the MOB screen. Needs the OLAS app running on a phone with at least 2G. No satellite, no DSC, no shore service.

Sources: [1] [2] [3]

SailTimer Wind Gauge (Audio Navigation)free app · SailTimer Wind Instrument €305.19 (wi-rb.com store, EUR as displayed) · SailTimer Wind Instrument US$349.99 (wi-rb.com base price, VAT not included)

Documented

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Spoken (voice) alerts
Speaks information

Documented, with a limit

Configurable alarm thresholds

Established absent

Alarm sounds from hardware aboard, not the phone
Multilingual voice
Works with screen off / in background

The maker does not say

Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app
Free tier: free app (no paid tier); needs SailTimer Wind Instrument and SailTimer API-WMM app
Wearable: Smartwatch (vendor names Sony Smartwatch 3; wi-rb.com calls it the SailTimer Watch app): mirrors the wind angle, wind direction, wind speed and boat speed shown on the phone, with dark/light toggle and 5-second dim. Limits: only while the Wind Gauge app is in the foreground on the phone/tablet; no alarms on the watch stated.

Sources: [1] [2] [3] [4] [5]

SEAiqsubscription · SEAiq: USD 15/year; SEAiq USA: USD 10/year (seaiq.com); App Store US: Premium Annual USD 15.00; legacy one-time Upgrade for Premium Features USD 49.99

Documented

Works offline aboard
Spoken (voice) alerts
Configurable alarm thresholds
Multilingual voice

Documented, with a limit

Every phone and tablet, no per-device fee
Works with screen off / in background
Speaks information

Established absent

Alarm sounds from hardware aboard, not the phone
No subscription
Alarm sounds through silent and Do Not Disturb

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app
Free tier: no purchase needed to view charts; premium navigation features free for a 7-day evaluation, then annual subscription
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

Signal K Notification Player (plugin)free app

Documented

Alarm sounds from hardware aboard, not the phone
No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Spoken (voice) alerts
Configurable alarm thresholds
Works with screen off / in background

Documented, with a limit

Speaks information

Established absent

Multilingual voice

The maker does not say

Alarm sounds through silent and Do Not Disturb

Alarm runs on: the app and a device fitted aboard
Free tier: free app (no paid tier), open source
Wearable: none stated

Sources: [1] [2]

Smartboatiafreemium · €999.00 incl. 1 year Standard subscription + free EU shipping · Works without subscription. Standard subscription: from €9.99 a month; billing every 3 months or annual (save 25%); 1-year Standard valued at €119.99

Documented

Alarm sounds from hardware aboard, not the phone
No subscription
Works offline aboard
Works with screen off / in background

Documented, with a limit

Every phone and tablet, no per-device fee
Configurable alarm thresholds

Established absent

Spoken (voice) alerts
Multilingual voice
Speaks information

The maker does not say

Alarm sounds through silent and Do Not Disturb

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: free without subscription: automated logbook, plotter, live on-board data, air pressure, trim advice, anchor watch, battery monitoring, boat polar; Standard adds 25 Boat Buddies, permanent cloud storage, ~5 s sync, charts, GPX export, LTE-NB
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

Documented

Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee
Works offline aboard
Spoken (voice) alerts
Configurable alarm thresholds
Works with screen off / in background

Documented, with a limit

No subscription

Established absent

none

The maker does not say

Multilingual voice
Speaks information
Alarm sounds through silent and Do Not Disturb

Alarm runs on: the app and a device fitted aboard
Alerts ashore: push
Free tier: app setup free; real-time alerts, remote control, vessel tracking, geofence and AnchorWatch require unlocking the hub (paid plan)
Wearable: none stated

Sources: [1] [2]

Voice Sail Start Timerfree

Documented

No subscription
Every phone and tablet, no per-device fee
Spoken (voice) alerts
Multilingual voice
Works with screen off / in background
Speaks information

Documented, with a limit

Configurable alarm thresholds

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Works offline aboard
Alarm sounds through silent and Do Not Disturb

Alarm runs on: the phone, tablet or computer running the app
Free tier: free app (no paid tier); Bluetooth remote horn sold separately
Wearable: none stated

Sources: [1] [2] [3] [4]

WATCHIT (Sense / Eye)quote on request

Documented

Alarm sounds from hardware aboard, not the phone
Spoken (voice) alerts
Works with screen off / in background

Established absent

Configurable alarm thresholds

The maker does not say

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Multilingual voice
Speaks information
Alarm sounds through silent and Do Not Disturb

Alarm runs on: the app and a device fitted aboard

Sources: [1] [2]

Category

Log books

On a phone the comparison grid is replaced by the verdicts below, one per app, which carry the same marks in words. The grid is there on a wider screen.

The specialists that document the most of this table: Ship's Log Book for Captains (Logbook); HelmLog, Sailing Logbook; and NaviLog. What the Galvanic Sailing app documents that the others mostly do not: Alerts spoken aloud (documented, fully or in part, by 0 of 24 others); Alarms that fired are kept in the log (documented, fully or in part, by 0 of 24 others).

24 apps compared with ours on 17 features.

App	Alerts spoken aloud	No subscription	Every phone and tablet, no per-device fee	Works offline aboard	Automatic trip logging	Manual log entries	Engine hours	Crew list	Photos/notes	Auto-logs instrument data (wind, engine, fuel)	Fuel log	Official crew list or sea-miles certificate	Export GPX	Export CSV	Export PDF	The log names the places, not just the coordinates	Alarms that fired are kept in the log	Price, as published
Galvanic Sailing appGalvanic Works S.L. · Android 7.0+ on Google Play; iOS 15.5+ on the App Store; phones and tablets	✔	✔	✔	✔	✔	~	✔	✔	✘	✔	✔	~	✘	✔	✔	✔	✔	free to download; the full app with a Galvanic Voice aboard · Galvanic Voice €1,149.50 incl. 21% Spanish VAT (€950 ex-VAT) · chart, weather and position free on any phone, and a guided tour and simulation of every tab; no subscription; official nautical charts, when offered, will be a paid extra charged per boat
Boat Logbook & GPS TrackerMYSTIC MOBILE APPS LLC · iOS; iPadOS; watchOS; Android; Wear OS	?	~	~	~	~	✘	~	✘	✔	~	✘	✘	~	~	✘	?	?	freemium · UK App Store in-app purchases: Annual Boat Logbook & GPS Tracker+ £8.99; Monthly Boat Logbook & GPS Tracker+ £0.99. Google Play: contains ads, in-app purchases (prices not shown); ad-free subscription
Boating Logbook: SkipperAxel Le Pennec · iOS; iPadOS	?	~	~	~	✔	✔	✔	✔	~	✘	✘	✘	✔	✘	✘	?	?	freemium · US App Store in-app purchases: Skipper+ Weekly $7.99; Yearly $35.99; Lifetime $124.99
DECKEE Boating AppDeckee PTY LTD · iOS; Android	?	✔	✔	~	✔	✔	✘	✘	?	✘	✘	✘	?	✘	✘	?	✘	free · US App Store: Free, no in-app purchases listed
EkyNavy – Sailing LogbookMichael Dusong (App Store seller; Google Play: Ekytec; site: Ekylibr SA, Neuchâtel) · iOS; iPadOS; macOS; watchOS; Android; web	?	~	✔	✔	~	✔	✔	✔	~	✘	~	✔	~	✔	~	✘	✘	freemium · Website (EUR): Mousse free; Navigator €19/year or €4/month; Skipper €49.99/year or €8.99/month; Skipper Pro €69.99/year or €12.99/month; SHOM charts add-on €4-€8/month or €8-€19/year; anchor-watch SMS packs 20 for €4.99, 50 for €9.99. App Store listing also names a Commodore tier (unpriced). UK App Store in-app purchases shown: Anchor Watch SMS Pack 50 £8.99; Anchor Watch SMS Pack 20 £3.99; All SHOM charts £19.99 / £7.00; SHOM Overseas charts £9.99; HOM Overseas charts £4.00; SHOM Mediterranean charts £4.00 / £12.99; SHOM Atlantic charts (yearly) £12.99; SHOM Atlantic charts £4.00
HelmLog, Sailing LogbookElmo Asmussen (App Store seller; website helmlog.com © Zeaspark) · iOS (iPhone); watchOS	?	~	✔	~	✔	✔	✔	✔	✔	✘	✔	✔	✔	~	~	?	?	freemium · UK App Store in-app purchases: HelmLog Pro, yearly, £24.99; HelmLog Pro £3.99 (billing period not shown). Listing: Pro subscriptions auto-renew. Website: Pro 'Pricing available in the app. Billed through Apple.'
Log – Simple Ship LogbookKyle Pickering · iOS; iPadOS	?	✔	~	✔	✘	✔	✔	✔	~	✘	~	?	?	?	?	✘	?	free · UK App Store: Free, no in-app purchases
LogBook – Digital Yacht LogMathias Matejcik · iOS; macOS (Apple silicon); visionOS	?	~	✔	?	✘	✔	✔	✔	✔	✘	✔	✔	?	✔	✔	✘	✘	freemium · in euros: LogBook Pro €4.99, €39.99 or €89.99 (App Store, Germany) · US App Store in-app purchases: LogBook Pro $79.99; LogBook Pro $34.99; LogBook Pro $3.99 (billing periods not shown on listing)
Logbook Suite (Logbook)2K Yachting / Trimutic UG (App Store seller) · iOS (iPad); macOS; Windows	?	~	✘	✔	~	✔	✔	✔	✔	~	✔	~	?	✔	✔	✘	✘	one-off + optional subscription · Legacy full versions (one-off, incl. 19% German VAT): Logbook Basic €106 (1 device) / €160 (2 devices); Logbook NMEA €144 / €216; Logbook Pro €239 / €359; Logbook Pro Limited 30 €69; Logbook Lite €59. Add-ons €18-€47 each. SYNC subscription: €39 / 1 month, €60 / 3 months, €118 / 1 year (logbooksuite.de prices page). US App Store: Free, paid licenses via in-app purchase
moodSailorSociété Française d'Infonuagique (France) · iOS 15.0+; Android	✘	✔	✔	✔	✔	?	?	?	?	?	?	?	?	?	?	?	?	free · No price published anywhere, in any currency. Free on both stores, no in-app purchase, no subscription, no pro tier, no ads. Maker: "The whole app, all of its features, for free." AIS arrives free over community networks (aisstream.io, pelyr.com).
NaviLogFelix Bartschi · iOS; iPadOS; macOS (Apple silicon); visionOS	?	✔	✔	✔	✔	✔	✔	✔	✔	✘	✘	✔	✔	~	~	?	?	freemium · in euros: Pro upgrade €7.99 (App Store, Germany) · US App Store in-app purchase: Pro Upgrade $6.99
Nebo – Boat Logging Made EasyNEBO GLOBAL PTY LTD · iOS; Android	?	~	✔	~	~	✔	✘	✔	✔	✘	✘	✘	?	?	✔	~	✘	freemium · $249.00 USD (nebolink, listed out of stock) · Starter: free. Silver: $59.90 billed annually or $7.19 USD per month billed monthly. Gold: $109.99 billed annually or $13.90 USD per month billed monthly (nebo.global/membership; same prices as US App Store in-app purchases). US Google Play: $6.99 – $109.99 per item
NV ChartsNV Chart Group GmbH (Eckernförde, Germany) · iOS; Android; Windows 11/10/8; macOS 10.13+; browser web app at app.nvcharts.com	?	~	?	✔	?	✔	?	?	✔	?	?	?	?	?	?	?	?	freemium · App free. Charts €49.90 per region per year, auto-renewing, 15 regions; or bundled with a paper chart in a combo pack with a one-year update service.
OrcaOrca Technologies AS · iOS; iPadOS; watchOS; macOS (Apple M1 or later); Android; Orca Display	?	~	~	~	✔	✘	✘	✘	?	✔	✔	✘	✔	✘	✘	✘	✘	subscription · Orca Core 2 EUR 649; Orca Display 2 EUR 999; Charging Mount EUR 349 (getorca.com configurator, delivery to Europe) · Orca Plus EUR 49/year; Orca Smart Navigation EUR 149/year (help centre); App Store US in-app purchase list: Orca Plus USD 44.99, Orca Smart Navigation USD 159.99 and USD 89.99, Orca Subscription USD 129.00 (billing period not stated)
Pocket Sailing LogbookBojan Belovic · iOS; iPadOS; web (companion)	?	✔	~	✔	✔	✔	✘	✔	~	✘	✘	✘	?	✔	✘	✘	✘	free · UK App Store: Free, no in-app purchases
Sail-Log – Nautical Log BookA.Wedemeyer · Android	?	✔	~	✔	✔	✔	✘	~	✔	✘	✘	~	✔	✔	~	✘	✘	one-off · US Google Play: $8.90 (Buy)
Sailing Log: Boat LogbookJoosep Koljalg · iOS; iPadOS	?	✔	~	~	✔	✘	✔	✔	✔	✘	✘	✘	✔	✘	✘	?	?	freemium · UK App Store in-app purchase: Unlimited Logbook £9.99 (listing: first 10 trips free; unlimited trips a single one-time purchase, no subscription)
SailloggerSaillogger · web; iOS; Android	?	✘	~	~	✔	✔	✔	✘	✔	✔	✘	✘	✔	✔	~	✔	✘	subscription · Free for 45 days, then USD 7.99 per month or the local equivalent; no annual plan (saillogger.com)
SailTies: Logbook GPS TrackingSail Ties Ltd · iOS; Android; macOS (Apple silicon); visionOS	?	~	~	✔	✔	✔	✘	✔	✔	✘	✘	~	?	✘	~	?	?	freemium · US App Store in-app purchases: SailTies Plus Yearly $44.99; SailTies Plus Lifetime $249.99
Salt & Wire CompanionMaciej Jan Karnowski, trading as Salt & Wire (Poland) · Android 7.0+ only; iOS in preparation, no date	✘	✔	✔	✔	~	✔	✔	?	?	~	✔	✔	?	✘	~	?	?	freemium · PLUS subscription, Google Play, three-day trial; no labelled price published. Google's in-app purchase range for the listing is EUR 9.49 to EUR 28.99, not confirmed as the PLUS price
SeaGuardianSeaGuardian with The 24hr Solutions Group (App Store seller: 24HR Vehicle Solutions Ltd, UK) · iOS (App Store GB); maker says Google Play too	✘	~	✔	✘	~	✔	✘	✔	~	~	✘	~	?	?	?	?	?	freemium · App Store GB: app is a paid download £1.99 plus in-app purchase "SeaGuardian" £1.99; maker site: free account, Silver £1.99/month, Gold coming soon
SeaPeople: Boat TrackerSeaPeople, Inc. · iOS; Android	?	~	~	~	✔	✔	✘	✔	✔	✘	✘	✘	?	✘	✘	?	?	freemium · US App Store in-app purchases: Monthly Plus $6.99; Annual Plus $64.99; Seasonal Plus $19.99; Annual Patron $149.99; Seasonal Patron $74.99; Patron+ $490.00. US Google Play: $6.99 – $489.99 per item
Ship's Log Book for Captains (Logbook)Florian Kriesche · iOS; iPadOS; watchOS; Android	?	~	✔	~	✔	✔	✔	✔	✔	~	~	✘	✔	✔	✔	✔	✘	freemium · US App Store in-app purchases: Annual Legacy Plan $3.99; Annual Plan $8.99; Annual Supporter Plan $17.99; Annual Patron Plan $44.99. US Google Play: $8.99 – $44.99 per item
TheBoatAppMarine Data Cloud Ltd · web; iOS; Android	?	~	✔	~	✔	✔	✔	✔	✔	✘	✔	✘	?	✔	✔	?	✘	freemium · Free: €0. Essentials: €19 per license, billed yearly. Plus: €49 per license, billed yearly. Pro: €99 per license, billed yearly (theboatapp.com/pricing). US App Store lists no in-app purchases
TIMEZERO TZ NavigatorMaxSeaNaval · Windows PC (TZ iBoat is the iPhone/iPad companion)	✘	✔	✘	✔	~	~	✘	✘	?	~	✘	✘	?	~	?	✔	✘	TZ Navigator (store item 'TimeZero Rec'): €503 / $420 / £429; upgrade from older version €188 / $158 / £167; Weather Routing module €387 / $315 / £335; Furuno Radar or Sounder module €525 each. Licence type not stated in the store.

The verdicts, one by one (25)

Documented

Alerts spoken aloud
No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Automatic trip logging
Engine hours
Crew list
Auto-logs instrument data (wind, engine, fuel)
Fuel log
Export CSV
Export PDF
The log names the places, not just the coordinates
Alarms that fired are kept in the log

Documented, with a limit

Manual log entries
Official crew list or sea-miles certificate

Established absent

Photos/notes
Export GPX

The maker does not say

none

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: free to download: chart, weather and position on any phone, and a guided tour and simulation of every tab (manual §38 and §40; store listing); the full app needs a Galvanic Voice aboard
Wearable: Galvanic Pulse bracelet (up to 16 per vessel): IP67 BLE 5.0 wristband with vibration motor, buzzer, LED and one button. Does: man-overboard alert when unheard for longer than the captain-set delay (from 10 s to 10 min, default 60 s) while under way; 'has left the boat' notice at anchor or in harbour; watch-reminder vibration with triple-tap acknowledge; rest and activity detection feeding the fatigue model (§27); can be paired to equipment such as a harness. Battery about 2 months, charges from USB. Limits: bodies, metal bulkheads, engine rooms and aluminium or steel hulls attenuate the BLE signal, so a sleeper lying on the arm can go unheard; every phone and tablet aboard with the Galvanic Sailing app acts as an extra listener for the Galvanic Pulse bracelets (Galvanic Pulse listening, §30). One Galvanic Voice is loud enough to wake the whole boat. People add more for convenience: with a unit close by, an alert can be silenced with a wave of the hand past it, wherever they are aboard. Range in metres not given in the manual. Manual describes no smartwatch app. (manual §23 to §34)

Boat Logbook & GPS Trackerfreemium · UK App Store in-app purchases: Annual Boat Logbook & GPS Tracker+ £8.99; Monthly Boat Logbook & GPS Tracker+ £0.99. Google Play: contains ads, in-app purchases (prices not shown); ad-free subscription

Documented

Photos/notes

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Automatic trip logging
Engine hours
Auto-logs instrument data (wind, engine, fuel)
Export GPX
Export CSV

Established absent

Manual log entries
Crew list
Fuel log
Official crew list or sea-miles certificate
Export PDF

The maker does not say

Alerts spoken aloud
The log names the places, not just the coordinates
Alarms that fired are kept in the log

Free tier: Google Play: 'free basic features with ads' and an ad-free subscription 'for unlimited, uninterrupted usage'; which features are limited not stated
Wearable: Wear OS (Google Play): 'Compatible with both phones and Wear OS smartwatches … syncs your data across devices'; watch functions not described. UK App Store lists Apple Watch among supported devices (watchOS 10.6+), but its description text is for a cycling app ('independent watch application'), so boat watch functions not described

Sources: [1] [2] [3]

Boating Logbook: Skipperfreemium · US App Store in-app purchases: Skipper+ Weekly $7.99; Yearly $35.99; Lifetime $124.99

Documented

Automatic trip logging
Manual log entries
Engine hours
Crew list
Export GPX

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Photos/notes

Established absent

Auto-logs instrument data (wind, engine, fuel)
Fuel log
Official crew list or sea-miles certificate
Export CSV
Export PDF

The maker does not say

Alerts spoken aloud
The log names the places, not just the coordinates
Alarms that fired are kept in the log

Free tier: First three recorded or imported activities free; Skipper+ subscription unlocks unlimited activities
Wearable: none stated

Sources: [1] [2]

DECKEE Boating Appfree · US App Store: Free, no in-app purchases listed

Documented

No subscription
Every phone and tablet, no per-device fee
Automatic trip logging
Manual log entries

Documented, with a limit

Works offline aboard

Established absent

Engine hours
Crew list
Auto-logs instrument data (wind, engine, fuel)
Fuel log
Official crew list or sea-miles certificate
Export CSV
Export PDF
Alarms that fired are kept in the log

The maker does not say

Alerts spoken aloud
Photos/notes
Export GPX
The log names the places, not just the coordinates

Free tier: free app (no in-app purchases listed on US App Store)
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6] [7]

EkyNavy – Sailing Logbookfreemium · Website (EUR): Mousse free; Navigator €19/year or €4/month; Skipper €49.99/year or €8.99/month; Skipper Pro €69.99/year or €12.99/month; SHOM charts add-on €4-€8/month or €8-€19/year; anchor-watch SMS packs 20 for €4.99, 50 for €9.99. App Store listing also names a Commodore tier (unpriced). UK App Store in-app purchases shown: Anchor Watch SMS Pack 50 £8.99; Anchor Watch SMS Pack 20 £3.99; All SHOM charts £19.99 / £7.00; SHOM Overseas charts £9.99; HOM Overseas charts £4.00; SHOM Mediterranean charts £4.00 / £12.99; SHOM Atlantic charts (yearly) £12.99; SHOM Atlantic charts £4.00

Documented

Every phone and tablet, no per-device fee
Works offline aboard
Manual log entries
Engine hours
Crew list
Official crew list or sea-miles certificate
Export CSV

Documented, with a limit

No subscription
Automatic trip logging
Photos/notes
Fuel log
Export GPX
Export PDF

Established absent

Auto-logs instrument data (wind, engine, fuel)
The log names the places, not just the coordinates
Alarms that fired are kept in the log

The maker does not say

Alerts spoken aloud

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: push, email, SMS
Free tier: Mousse (free): 3 owned boats, unlimited trips and crew, GPS tracking 50 miles/year, 5 weather and 5 tide requests/month, complete navigation logs, unlimited history, logbook PDF export (website); photos not included
Wearable: Apple Watch (iOS): start, stop, pause tracking; real-time speed, heading, distance, duration; MOB alert with return guidance to alert position; see anchor-watch state and stop the alarm from the wrist. Site FAQ: every feature also available without the watch. No Wear OS stated

Sources: [1] [2] [3] [4] [5] [6] [7]

HelmLog, Sailing Logbookfreemium · UK App Store in-app purchases: HelmLog Pro, yearly, £24.99; HelmLog Pro £3.99 (billing period not shown). Listing: Pro subscriptions auto-renew. Website: Pro 'Pricing available in the app. Billed through Apple.'

Documented

Every phone and tablet, no per-device fee
Automatic trip logging
Manual log entries
Engine hours
Crew list
Photos/notes
Fuel log
Official crew list or sea-miles certificate
Export GPX

Documented, with a limit

No subscription
Works offline aboard
Export CSV
Export PDF

Established absent

Auto-logs instrument data (wind, engine, fuel)

The maker does not say

Alerts spoken aloud
The log names the places, not just the coordinates
Alarms that fired are kept in the log

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free: 1 boat, 10 trips, 3 maintenance records, GPX export; GPS tracking, weather, tides, anchor alarm, crew management, checklists and Apple Watch app included
Wearable: Apple Watch companion app (included for all users, no extra purchase): shows speed, heading, trip duration and distance; switch sail/engine mode, stop the trip, acknowledge an anchor alarm from the wrist; 'communicates with your iPhone in real-time'

Sources: [1] [2]

Log – Simple Ship Logbookfree · UK App Store: Free, no in-app purchases

Documented

No subscription
Works offline aboard
Manual log entries
Engine hours
Crew list

Documented, with a limit

Every phone and tablet, no per-device fee
Photos/notes
Fuel log

Established absent

Automatic trip logging
Auto-logs instrument data (wind, engine, fuel)
The log names the places, not just the coordinates

The maker does not say

Alerts spoken aloud
Official crew list or sea-miles certificate
Export GPX
Export CSV
Export PDF
Alarms that fired are kept in the log

Alarm runs on: the phone, tablet or computer running the app
Free tier: free app (no in-app purchases listed on UK App Store)
Wearable: none stated

Sources: [1] [2] [3] [4]

LogBook – Digital Yacht Logfreemium · in euros: LogBook Pro €4.99, €39.99 or €89.99 (App Store, Germany) · US App Store in-app purchases: LogBook Pro $79.99; LogBook Pro $34.99; LogBook Pro $3.99 (billing periods not shown on listing)

Documented

Every phone and tablet, no per-device fee
Manual log entries
Engine hours
Crew list
Photos/notes
Fuel log
Official crew list or sea-miles certificate
Export CSV
Export PDF

Documented, with a limit

No subscription

Established absent

Automatic trip logging
Auto-logs instrument data (wind, engine, fuel)
The log names the places, not just the coordinates
Alarms that fired are kept in the log

The maker does not say

Alerts spoken aloud
Works offline aboard
Export GPX

Free tier: unlimited voyages, crew, PDF export (with footer watermark); Pro removes watermark, adds cloud sync, statistics, Sailing Atlas
Wearable: none stated

Sources: [1] [2]

Logbook Suite (Logbook)one-off + optional subscription · Legacy full versions (one-off, incl. 19% German VAT): Logbook Basic €106 (1 device) / €160 (2 devices); Logbook NMEA €144 / €216; Logbook Pro €239 / €359; Logbook Pro Limited 30 €69; Logbook Lite €59. Add-ons €18-€47 each. SYNC subscription: €39 / 1 month, €60 / 3 months, €118 / 1 year (logbooksuite.de prices page). US App Store: Free, paid licenses via in-app purchase

Documented

Works offline aboard
Manual log entries
Engine hours
Crew list
Photos/notes
Fuel log
Export CSV
Export PDF

Documented, with a limit

No subscription
Automatic trip logging
Auto-logs instrument data (wind, engine, fuel)
Official crew list or sea-miles certificate

Established absent

Every phone and tablet, no per-device fee
The log names the places, not just the coordinates
Alarms that fired are kept in the log

The maker does not say

Alerts spoken aloud
Export GPX

Alarm runs on: the phone, tablet or computer running the app
Free tier: App installs a limited version: all features, but Logbook limited to 5 travel days and Add-ons to 9 entries
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6] [7]

Documented

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Automatic trip logging

Established absent

Alerts spoken aloud

The maker does not say

Manual log entries
Engine hours
Crew list
Photos/notes
Auto-logs instrument data (wind, engine, fuel)
Fuel log
Official crew list or sea-miles certificate
Export GPX
Export CSV
Export PDF
The log names the places, not just the coordinates
Alarms that fired are kept in the log

Alarm runs on: the phone, tablet or computer running the app
Free tier: everything, free

Sources: [1] [2]

NaviLogfreemium · in euros: Pro upgrade €7.99 (App Store, Germany) · US App Store in-app purchase: Pro Upgrade $6.99

Documented

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Automatic trip logging
Manual log entries
Engine hours
Crew list
Photos/notes
Official crew list or sea-miles certificate
Export GPX

Documented, with a limit

Export CSV
Export PDF

Established absent

Auto-logs instrument data (wind, engine, fuel)
Fuel log

The maker does not say

Alerts spoken aloud
The log names the places, not just the coordinates
Alarms that fired are kept in the log

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free: full logbook with GPS tracking, anchor alarm and MOB; one-time Pro unlocks PDF/GPX/CSV export, crew lists, templates, offline chart download
Wearable: none stated

Sources: [1] [2]

Nebo – Boat Logging Made Easyfreemium · $249.00 USD (nebolink, listed out of stock) · Starter: free. Silver: $59.90 billed annually or $7.19 USD per month billed monthly. Gold: $109.99 billed annually or $13.90 USD per month billed monthly (nebo.global/membership; same prices as US App Store in-app purchases). US Google Play: $6.99 – $109.99 per item

Documented

Every phone and tablet, no per-device fee
Manual log entries
Crew list
Photos/notes
Export PDF

Documented, with a limit

No subscription
Works offline aboard
Automatic trip logging
The log names the places, not just the coordinates

Established absent

Engine hours
Auto-logs instrument data (wind, engine, fuel)
Fuel log
Official crew list or sea-miles certificate
Alarms that fired are kept in the log

The maker does not say

Alerts spoken aloud
Export GPX
Export CSV

Alarm runs on: a device fitted aboard
Free tier: Starter (free): detailed captain's log, live global map, chat with friends, 3 months' voyage archives and on-demand reports, search and find other boats
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6] [7] [8]

NV Chartsfreemium · App free. Charts €49.90 per region per year, auto-renewing, 15 regions; or bundled with a paper chart in a combo pack with a one-year update service.

Documented

Works offline aboard
Manual log entries
Photos/notes

Documented, with a limit

No subscription

Established absent

none

The maker does not say

Alerts spoken aloud
Every phone and tablet, no per-device fee
Automatic trip logging
Engine hours
Crew list
Auto-logs instrument data (wind, engine, fuel)
Fuel log
Official crew list or sea-miles certificate
Export GPX
Export CSV
Export PDF
The log names the places, not just the coordinates
Alarms that fired are kept in the log

Alarm runs on: the phone, tablet or computer running the app
Free tier: app free, charts paid

Sources: [1] [2]

Documented

Automatic trip logging
Auto-logs instrument data (wind, engine, fuel)
Fuel log
Export GPX

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Works offline aboard

Established absent

Manual log entries
Engine hours
Crew list
Official crew list or sea-miles certificate
Export CSV
Export PDF
The log names the places, not just the coordinates
Alarms that fired are kept in the log

The maker does not say

Alerts spoken aloud
Photos/notes

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: Free (no subscription): online charts, instruments, autopilot and radar controls (with Core), AIS via internet, 50NM automatic engine routing, 7 days of Logbook data
Wearable: Apple Watch app (watchOS 9.0+). The manual says the Core lets you control your autopilot wirelessly from phone, tablet and Apple Watch, so this needs an Orca Core. No other watch functions described.

Sources: [1] [2] [3] [4] [5] [6] [7] [8]

Pocket Sailing Logbookfree · UK App Store: Free, no in-app purchases

Documented

No subscription
Works offline aboard
Automatic trip logging
Manual log entries
Crew list
Export CSV

Documented, with a limit

Every phone and tablet, no per-device fee
Photos/notes

Established absent

Engine hours
Auto-logs instrument data (wind, engine, fuel)
Fuel log
Official crew list or sea-miles certificate
Export PDF
The log names the places, not just the coordinates
Alarms that fired are kept in the log

The maker does not say

Alerts spoken aloud
Export GPX

Free tier: free app (no in-app purchases listed on UK App Store); free account (email and password) required
Wearable: none stated

Sources: [1] [2] [3]

Sail-Log – Nautical Log Bookone-off · US Google Play: $8.90 (Buy)

Documented

No subscription
Works offline aboard
Automatic trip logging
Manual log entries
Photos/notes
Export GPX
Export CSV

Documented, with a limit

Every phone and tablet, no per-device fee
Crew list
Official crew list or sea-miles certificate
Export PDF

Established absent

Engine hours
Auto-logs instrument data (wind, engine, fuel)
Fuel log
The log names the places, not just the coordinates
Alarms that fired are kept in the log

The maker does not say

Alerts spoken aloud

Free tier: no free tier ($8.90 paid app); separate free LD-Log Lite (max 2 routes per trip, some features demo only)
Wearable: none stated

Sources: [1] [2] [3]

Sailing Log: Boat Logbookfreemium · UK App Store in-app purchase: Unlimited Logbook £9.99 (listing: first 10 trips free; unlimited trips a single one-time purchase, no subscription)

Documented

No subscription
Automatic trip logging
Engine hours
Crew list
Photos/notes
Export GPX

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard

Established absent

Manual log entries
Auto-logs instrument data (wind, engine, fuel)
Fuel log
Official crew list or sea-miles certificate
Export CSV
Export PDF

The maker does not say

Alerts spoken aloud
The log names the places, not just the coordinates
Alarms that fired are kept in the log

Alarm runs on: the phone, tablet or computer running the app
Free tier: First 10 trips free; unlimited trips via a single one-time purchase (Unlimited Logbook £9.99)
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]

Sailloggersubscription · Free for 45 days, then USD 7.99 per month or the local equivalent; no annual plan (saillogger.com)

Documented

Automatic trip logging
Manual log entries
Engine hours
Photos/notes
Auto-logs instrument data (wind, engine, fuel)
Export GPX
Export CSV
The log names the places, not just the coordinates

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard
Export PDF

Established absent

No subscription
Crew list
Fuel log
Official crew list or sea-miles certificate
Alarms that fired are kept in the log

The maker does not say

Alerts spoken aloud

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: push, email
Free tier: no free tier (45-day free trial, then USD 7.99/month)
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

SailTies: Logbook GPS Trackingfreemium · US App Store in-app purchases: SailTies Plus Yearly $44.99; SailTies Plus Lifetime $249.99

Documented

Works offline aboard
Automatic trip logging
Manual log entries
Crew list
Photos/notes

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Official crew list or sea-miles certificate
Export PDF

Established absent

Engine hours
Auto-logs instrument data (wind, engine, fuel)
Fuel log
Export CSV

The maker does not say

Alerts spoken aloud
Export GPX
The log names the places, not just the coordinates
Alarms that fired are kept in the log

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free: one-tap GPS voyage tracking, logbook with photos/logs, crew collaboration, sailing resume with PDF export; SailTies Plus adds automatic historic weather, collections, video upload
Wearable: none stated

Sources: [1] [2] [3]

Documented

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Manual log entries
Engine hours
Fuel log
Official crew list or sea-miles certificate

Documented, with a limit

Automatic trip logging
Auto-logs instrument data (wind, engine, fuel)
Export PDF

Established absent

Alerts spoken aloud
Export CSV

The maker does not say

Crew list
Photos/notes
Export GPX
The log names the places, not just the coordinates
Alarms that fired are kept in the log

Sources: [1] [2]

SeaGuardianfreemium · App Store GB: app is a paid download £1.99 plus in-app purchase "SeaGuardian" £1.99; maker site: free account, Silver £1.99/month, Gold coming soon

Documented

Every phone and tablet, no per-device fee
Manual log entries
Crew list

Documented, with a limit

No subscription
Automatic trip logging
Photos/notes
Auto-logs instrument data (wind, engine, fuel)
Official crew list or sea-miles certificate

Established absent

Alerts spoken aloud
Works offline aboard
Engine hours
Fuel log

The maker does not say

Export GPX
Export CSV
Export PDF
The log names the places, not just the coordinates
Alarms that fired are kept in the log

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: SMS
Free tier: Free account: sail plan, tracking, overdue alerts and SOS work on any plan; Silver £1.99/month for the rest
Wearable: none stated

Sources: [1] [2] [3] [4]

SeaPeople: Boat Trackerfreemium · US App Store in-app purchases: Monthly Plus $6.99; Annual Plus $64.99; Seasonal Plus $19.99; Annual Patron $149.99; Seasonal Patron $74.99; Patron+ $490.00. US Google Play: $6.99 – $489.99 per item

Documented

Automatic trip logging
Manual log entries
Crew list
Photos/notes

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Works offline aboard

Established absent

Engine hours
Auto-logs instrument data (wind, engine, fuel)
Fuel log
Official crew list or sea-miles certificate
Export CSV
Export PDF

The maker does not say

Alerts spoken aloud
Export GPX
The log names the places, not just the coordinates
Alarms that fired are kept in the log

Free tier: Free version: hail creation & participation, trip tracking/drawing/importing, groups, 1:1 and group chats, live trip sharing in-app
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6] [7] [8] [9]

Ship's Log Book for Captains (Logbook)freemium · US App Store in-app purchases: Annual Legacy Plan $3.99; Annual Plan $8.99; Annual Supporter Plan $17.99; Annual Patron Plan $44.99. US Google Play: $8.99 – $44.99 per item

Documented

Every phone and tablet, no per-device fee
Automatic trip logging
Manual log entries
Engine hours
Crew list
Photos/notes
Export GPX
Export CSV
Export PDF
The log names the places, not just the coordinates

Documented, with a limit

No subscription
Works offline aboard
Auto-logs instrument data (wind, engine, fuel)
Fuel log

Established absent

Official crew list or sea-miles certificate
Alarms that fired are kept in the log

The maker does not say

Alerts spoken aloud

Wearable: Apple Watch: App Store listing includes Apple Watch among supported devices; watch functions not described in listing or on logbook-app.com pages read

Sources: [1] [2] [3] [4] [5] [6] [7] [8]

TheBoatAppfreemium · Free: €0. Essentials: €19 per license, billed yearly. Plus: €49 per license, billed yearly. Pro: €99 per license, billed yearly (theboatapp.com/pricing). US App Store lists no in-app purchases

Documented

Every phone and tablet, no per-device fee
Automatic trip logging
Manual log entries
Engine hours
Crew list
Photos/notes
Fuel log
Export CSV
Export PDF

Documented, with a limit

No subscription
Works offline aboard

Established absent

Auto-logs instrument data (wind, engine, fuel)
Official crew list or sea-miles certificate
Alarms that fired are kept in the log

The maker does not say

Alerts spoken aloud
Export GPX
The log names the places, not just the coordinates

Free tier: Free (€0): 1 boat, basic dashboard, logbook, inventory, tasks, checklists, 30 alerts, files & documents, 300MB storage, mobile apps (online)
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6] [7] [8]

Documented

No subscription
Works offline aboard
The log names the places, not just the coordinates

Documented, with a limit

Automatic trip logging
Manual log entries
Auto-logs instrument data (wind, engine, fuel)
Export CSV

Established absent

Alerts spoken aloud
Every phone and tablet, no per-device fee
Engine hours
Crew list
Fuel log
Official crew list or sea-miles certificate
Alarms that fired are kept in the log

The maker does not say

Photos/notes
Export GPX
Export PDF

Alarm runs on: the phone, tablet or computer running the app
Wearable: none stated

Sources: [1] [2] [3]

Category

Crew watches

On a phone the comparison grid is replaced by the verdicts below, one per app, which carry the same marks in words. The grid is there on a wider screen.

The specialists that document the most of this table: Watchkeeper App, ISF Watchkeeper 4 (Mobile) and WatchKeeper (mywatchkeeper.app). What the Galvanic Sailing app documents that the others mostly do not: Alerts spoken aloud (documented, fully or in part, by 0 of 14 others); Alarm sounds from hardware aboard, not the phone (documented, fully or in part, by 0 of 14 others); Handover alarm with acknowledge (documented, fully or in part, by 1 of 14 others); Escalation if not acknowledged (documented, fully or in part, by 2 of 14 others); Wearable wakes the next watch (documented, fully or in part, by 1 of 14 others).

14 apps compared with ours on 13 features.

App	Alerts spoken aloud	Alarm sounds from hardware aboard, not the phone	No subscription	Every phone and tablet, no per-device fee	Works offline aboard	Watch schedule builder	Watch-change reminders/alarms	Crew roster	Fatigue tracking	Handover alarm with acknowledge	Escalation if not acknowledged	Rest-hour compliance (MLC rules)	Wearable wakes the next watch	Price, as published
Galvanic Sailing appGalvanic Works S.L. · Android 7.0+ on Google Play; iOS 15.5+ on the App Store; phones and tablets	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✘	✔	free to download; the full app with a Galvanic Voice aboard · Galvanic Voice €1,149.50 incl. 21% Spanish VAT (€950 ex-VAT) · chart, weather and position free on any phone, and a guided tour and simulation of every tab; no subscription; official nautical charts, when offered, will be a paid extra charged per boat
HRClick CrewHill Robinson Yacht Management (App Store seller: Yacht Management Consultants; offices UK, France, Monaco, Spain, USA) · iOS 15+; Android	?	✘	✔	?	?	?	?	~	~	?	?	?	?	free · No price at any tier. 'The Hours of Rest system is a free service granted to yachts.'
ISF Watchkeeper 4 (Mobile)IT Energy Systems & Consulting Limited (with International Chamber of Shipping) · iOS; Android; web	✘	✘	✘	✔	✔	~	✘	✔	~	✘	~	✔	✘	App download: Free (US App Store), no in-app purchases listed; ISF Watchkeeper 4 licence price not published (trial on request)
Sailboat Passage Planner (PassageCalc) · web	✘	?	✔	✔	?	✔	✘	✘	✘	✘	✘	?	✘	free · Free (web tool)
SailWatchProJames Bistis · iOS (iPhone, iPad); watchOS; macOS (Apple silicon); web portal	✘	✘	✘	?	~	✔	✘	✔	✘	✘	✘	?	✘	subscription · Performance and Grand Prix tiers: price not yet published; Beta: invitation only (licensed per boat, annual; covers all crew devices)
Salt & Wire CompanionMaciej Jan Karnowski, trading as Salt & Wire (Poland) · Android 7.0+ only; iOS in preparation, no date	✘	✘	✘	✔	?	✘	~	?	✘	?	✘	?	✘	freemium · PLUS subscription, Google Play, three-day trial; no labelled price published. Google's in-app purchase range for the listing is EUR 9.49 to EUR 28.99, not confirmed as the PLUS price
Total SuperyachtSuperyacht Operating Systems Pty Ltd · iOS; iPadOS; macOS (Apple M1 or later); visionOS	✘	✘	✘	~	~	~	✘	✔	~	✘	~	✔	✘	subscription · Private Yacht (Non-ISM) €250/month; Mini ISM €300/month; Full ISM €375/month, per vessel, cloud based; fleet pricing on request; app download free
Watch Plan, Crew & RestEvren Yucebas (no country published) · iOS 16.4+ (iPhone, iPad). English only.	?	?	✔	?	✔	✔	?	✔	~	?	?	?	?	free with a one-time unlock · 'One plan is free. More unlock together, once.' The unlock price is not published anywhere; Apple reports the app itself as Free.
Watch Schedule Planner (WorkHarbor)WorkHarbor · web	✘	✘	✔	✔	?	✔	✘	✘	✘	✘	✘	✘	✘	free · Free (web tool; site describes 'free calculators for seafarers')
WatchBellDeligent LLC · Android	✘	✘	✔	~	✔	✔	~	✔	✘	✘	✘	?	✘	free · Free on Google Play (US); listing says no account, no subscription, no ads
WatchKeeper (mywatchkeeper.app) · iOS (iPhone); watchOS (Apple Watch companion)	✘	✘	?	?	✔	✔	✔	✔	✘	✔	✘	?	~	no published price
Watchkeeper AppEdward McCreary · iOS; macOS (Apple M1 or later); visionOS	✘	✘	✔	~	✔	✔	✔	✔	~	✘	✘	~	✘	one-off · $5.99 (US App Store); no in-app purchases listed
Yacht WatchkeeperRoebuck AI Agency Ltd · web (installable web app on iPhone/iPad via Safari and Android via Chrome)	✘	✘	✘	✔	~	✔	✘	✔	~	✘	✘	✔	✘	subscription · ≤20 crew: £375/month; ≤40 crew: £525/month; ≤80 crew: £675/month (billed per vessel, prices exclude VAT; yachtwatchkeeper.com/pricing, read 5 Oct 2026)
YachtaraAD Internet Consulting BV, Belgium (founder Bart Schillebeeks) · web app live; Android live (ai.yachtara.app); iOS not yet released	?	?	~	?	✔	✔	?	✔	?	?	?	?	?	freemium · Free EUR 0; Essential EUR 15 per quarter (about EUR 5 a month); Premium EUR 39 per quarter (about EUR 13 a month); an AI tier is marked coming soon with no price. Billed quarterly or annually, incl. VAT
Yachtly Crew Watch SchedulerYachtly Crew · web	✘	?	~	~	?	✔	✘	✔	~	✘	✘	~	✘	freemium · Free to start; premium plans for unlimited usage, price not published

The verdicts, one by one (15)

Documented

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Watch schedule builder
Watch-change reminders/alarms
Crew roster
Fatigue tracking
Handover alarm with acknowledge
Escalation if not acknowledged
Wearable wakes the next watch

Established absent

Rest-hour compliance (MLC rules)

The maker does not say

none

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: free to download: chart, weather and position on any phone, and a guided tour and simulation of every tab (manual §38 and §40; store listing); the full app needs a Galvanic Voice aboard
Wearable: Galvanic Pulse bracelet (up to 16 per vessel): IP67 BLE 5.0 wristband with vibration motor, buzzer, LED and one button. Does: man-overboard alert when unheard for longer than the captain-set delay (from 10 s to 10 min, default 60 s) while under way; 'has left the boat' notice at anchor or in harbour; watch-reminder vibration with triple-tap acknowledge; rest and activity detection feeding the fatigue model (§27); can be paired to equipment such as a harness. Battery about 2 months, charges from USB. Limits: bodies, metal bulkheads, engine rooms and aluminium or steel hulls attenuate the BLE signal, so a sleeper lying on the arm can go unheard; every phone and tablet aboard with the Galvanic Sailing app acts as an extra listener for the Galvanic Pulse bracelets (Galvanic Pulse listening, §30). One Galvanic Voice is loud enough to wake the whole boat. People add more for convenience: with a unit close by, an alert can be silenced with a wave of the hand past it, wherever they are aboard. Range in metres not given in the manual. Manual describes no smartwatch app. (manual §23 to §34)

HRClick Crewfree · No price at any tier. 'The Hours of Rest system is a free service granted to yachts.'

Documented

No subscription

Documented, with a limit

Crew roster
Fatigue tracking

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Alerts spoken aloud
Every phone and tablet, no per-device fee
Works offline aboard
Watch schedule builder
Watch-change reminders/alarms
Handover alarm with acknowledge
Escalation if not acknowledged
Rest-hour compliance (MLC rules)
Wearable wakes the next watch

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: monthly records sync to the hrclick.com management platform and can be emailed from the app; records, not alerts
Free tier: free service granted to yachts

Sources: [1] [2]

ISF Watchkeeper 4 (Mobile)App download: Free (US App Store), no in-app purchases listed; ISF Watchkeeper 4 licence price not published (trial on request)

Documented

Every phone and tablet, no per-device fee
Works offline aboard
Crew roster
Rest-hour compliance (MLC rules)

Documented, with a limit

Watch schedule builder
Fatigue tracking
Escalation if not acknowledged

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription
Watch-change reminders/alarms
Handover alarm with acknowledge
Wearable wakes the next watch

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app
Wearable: none stated

Sources: [1] [2] [3]

Sailboat Passage Planner (PassageCalc)free · Free (web tool)

Documented

No subscription
Every phone and tablet, no per-device fee
Watch schedule builder

Established absent

Alerts spoken aloud
Watch-change reminders/alarms
Crew roster
Fatigue tracking
Handover alarm with acknowledge
Escalation if not acknowledged
Wearable wakes the next watch

The maker does not say

Alarm sounds from hardware aboard, not the phone
Works offline aboard
Rest-hour compliance (MLC rules)

Free tier: free web tool
Wearable: none stated

Sources: [1]

SailWatchProsubscription · Performance and Grand Prix tiers: price not yet published; Beta: invitation only (licensed per boat, annual; covers all crew devices)

Documented

Watch schedule builder
Crew roster

Documented, with a limit

Works offline aboard

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription
Watch-change reminders/alarms
Fatigue tracking
Handover alarm with acknowledge
Escalation if not acknowledged
Wearable wakes the next watch

The maker does not say

Every phone and tablet, no per-device fee
Rest-hour compliance (MLC rules)

Alarm runs on: the phone, tablet or computer running the app
Free tier: no free tier (beta free but invite-only; paid tiers not yet priced)
Wearable: Apple Watch app: dedicated race timer, boat speed, heel, VMG, TWA/AWA, depth views (depth view auto-switches on dangerous conditions); most critical active advisory pushed to the watch. Data syncs from the iPhone app. Manual: by default the watch returns to the clock face after a couple of minutes unless watchOS settings are changed

Sources: [1] [2] [3] [4]

Documented

Every phone and tablet, no per-device fee

Documented, with a limit

Watch-change reminders/alarms

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription
Watch schedule builder
Fatigue tracking
Escalation if not acknowledged
Wearable wakes the next watch

The maker does not say

Works offline aboard
Crew roster
Handover alarm with acknowledge
Rest-hour compliance (MLC rules)

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2]

Total Superyachtsubscription · Private Yacht (Non-ISM) €250/month; Mini ISM €300/month; Full ISM €375/month, per vessel, cloud based; fleet pricing on request; app download free

Documented

Crew roster
Rest-hour compliance (MLC rules)

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard
Watch schedule builder
Fatigue tracking
Escalation if not acknowledged

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription
Watch-change reminders/alarms
Handover alarm with acknowledge
Wearable wakes the next watch

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: email
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

Watch Plan, Crew & Restfree with a one-time unlock · 'One plan is free. More unlock together, once.' The unlock price is not published anywhere; Apple reports the app itself as Free.

Documented

No subscription
Works offline aboard
Watch schedule builder
Crew roster

Documented, with a limit

Fatigue tracking

Established absent

none

The maker does not say

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee
Watch-change reminders/alarms
Handover alarm with acknowledge
Escalation if not acknowledged
Rest-hour compliance (MLC rules)
Wearable wakes the next watch

Free tier: one plan free

Sources: [1]

Watch Schedule Planner (WorkHarbor)free · Free (web tool; site describes 'free calculators for seafarers')

Documented

No subscription
Every phone and tablet, no per-device fee
Watch schedule builder

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Watch-change reminders/alarms
Crew roster
Fatigue tracking
Handover alarm with acknowledge
Escalation if not acknowledged
Rest-hour compliance (MLC rules)
Wearable wakes the next watch

The maker does not say

Works offline aboard

Alarm runs on: the phone, tablet or computer running the app
Free tier: free web tool
Wearable: none stated

Sources: [1]

WatchBellfree · Free on Google Play (US); listing says no account, no subscription, no ads

Documented

No subscription
Works offline aboard
Watch schedule builder
Crew roster

Documented, with a limit

Every phone and tablet, no per-device fee
Watch-change reminders/alarms

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Fatigue tracking
Handover alarm with acknowledge
Escalation if not acknowledged
Wearable wakes the next watch

The maker does not say

Rest-hour compliance (MLC rules)

Alarm runs on: the phone, tablet or computer running the app
Free tier: free app (no paid tier)
Wearable: none stated

Sources: [1]

WatchKeeper (mywatchkeeper.app)no published price

Documented

Works offline aboard
Watch schedule builder
Watch-change reminders/alarms
Crew roster
Handover alarm with acknowledge

Documented, with a limit

Wearable wakes the next watch

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Fatigue tracking
Escalation if not acknowledged

The maker does not say

No subscription
Every phone and tablet, no per-device fee
Rest-hour compliance (MLC rules)

Alarm runs on: the phone, tablet or computer running the app
Wearable: Apple Watch companion app: at-a-glance watch status / quick wrist-based checks; no further detail or limitations stated

Sources: [1] [2] [3] [4] [5] [6]

Watchkeeper Appone-off · $5.99 (US App Store); no in-app purchases listed

Documented

No subscription
Works offline aboard
Watch schedule builder
Watch-change reminders/alarms
Crew roster

Documented, with a limit

Every phone and tablet, no per-device fee
Fatigue tracking
Rest-hour compliance (MLC rules)

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Handover alarm with acknowledge
Escalation if not acknowledged
Wearable wakes the next watch

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app
Free tier: no free tier ($5.99 one-time purchase)
Wearable: Apple Watch app listed as 'coming soon' on watchkeeperapp.com; not yet available

Sources: [1] [2] [3]

Yacht Watchkeepersubscription · ≤20 crew: £375/month; ≤40 crew: £525/month; ≤80 crew: £675/month (billed per vessel, prices exclude VAT; yachtwatchkeeper.com/pricing, read 5 Oct 2026)

Documented

Every phone and tablet, no per-device fee
Watch schedule builder
Crew roster
Rest-hour compliance (MLC rules)

Documented, with a limit

Works offline aboard
Fatigue tracking

Established absent

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
No subscription
Watch-change reminders/alarms
Handover alarm with acknowledge
Escalation if not acknowledged
Wearable wakes the next watch

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app
Free tier: no free tier (7-day free trial; one month for trials started by 30 Sep 2026)
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

Documented

Works offline aboard
Watch schedule builder
Crew roster

Documented, with a limit

No subscription

Established absent

none

The maker does not say

Alerts spoken aloud
Alarm sounds from hardware aboard, not the phone
Every phone and tablet, no per-device fee
Watch-change reminders/alarms
Fatigue tracking
Handover alarm with acknowledge
Escalation if not acknowledged
Rest-hour compliance (MLC rules)
Wearable wakes the next watch

Free tier: Free EUR 0 plan; contents not stated

Sources: [1] [2] [3]

Yachtly Crew Watch Schedulerfreemium · Free to start; premium plans for unlimited usage, price not published

Documented

Watch schedule builder
Crew roster

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Fatigue tracking
Rest-hour compliance (MLC rules)

Established absent

Alerts spoken aloud
Watch-change reminders/alarms
Handover alarm with acknowledge
Escalation if not acknowledged
Wearable wakes the next watch

The maker does not say

Alarm sounds from hardware aboard, not the phone
Works offline aboard

Sources: [1] [2]

Category

Boat maintenance

On a phone the comparison grid is replaced by the verdicts below, one per app, which carry the same marks in words. The grid is there on a wider screen.

The specialists that document the most of this table: Ready4Sea, Boat Manager, LookOver, TreMate and YACHTWAVE.

15 apps compared with ours on 13 features.

App	No subscription	Every phone and tablet, no per-device fee	Works offline aboard	Service schedule	Reminders	Engine-hours tracking	Parts/spares inventory	Document storage	Cost tracking	Engine hours read automatically	Certificate/document expiry alerts	Launch/haul-out checklists	Service intervals by miles or sailing hours	Price, as published
Galvanic Sailing appGalvanic Works S.L. · Android 7.0+ on Google Play; iOS 15.5+ on the App Store; phones and tablets	✔	✔	✔	✔	✔	✔	✘	✘	✘	✔	✔	~	✔	free to download; the full app with a Galvanic Voice aboard · Galvanic Voice €1,149.50 incl. 21% Spanish VAT (€950 ex-VAT) · chart, weather and position free on any phone, and a guided tour and simulation of every tab; no subscription; official nautical charts, when offered, will be a paid extra charged per boat
Boat ButlerBoat Butler App. LLC (Play listing: designed and developed by Biz4Group LLC) · iOS; Android; macOS (Apple M1 or later)	~	✔	?	✔	✔	✔	?	✔	~	✔	?	?	✔	freemium · US App Store in-app purchase: business yearly $39.99
Boat ManagerJohn Tattersfield (copyright NINW LLC) · iOS; macOS	✘	~	✔	✔	✔	✔	✔	✔	✔	✘	✔	?	~	subscription · US App Store in-app purchases: Boat Manager Plus Annual $9.99; Boat Manager Plus Monthly $0.99
Boating SuiteBoating Suite, LLC · iOS; macOS (Apple M1 or later)	✘	~	✔	✘	✘	~	✘	~	✔	✘	✘	?	✘	subscription · US App Store in-app purchases: Monthly Subscription $7.99; Annual Subscription $59.99
BoatMateyMartin Cavey · iOS; Android; macOS (Apple M1 or later)	✘	✔	~	✔	✔	✔	~	✔	✔	✘	~	?	✔	subscription · US App Store in-app purchases: BoatMatey Pro – Annual $39.99; BoatMatey Monthly $4.99
LookOverLookOver, LLC · iOS; Android; web	✔	✔	✔	~	✔	✔	?	~	~	✘	✔	~	✔	freemium · Vendor site: Free $0 forever; Premium $24.99/year or $99.99 one-time lifetime. US App Store in-app purchases: LookOver Pro – Annual $24.99; LookOver Pro – Monthly $3.99; LookOver Pro – Lifetime Access $99.99
Mercury MarineMercury Marine LLC · iOS; Android	✔	✔	~	✔	✔	✔	?	✘	?	✔	✘	?	✔	free
Ready4SeaSAS Ready4Sea · iOS; Android; web	✔	~	~	✔	✔	✔	~	✔	✔	✘	~	✔	~	freemium · Vendor site: Basic free; Standard 2.49 € per month i.e. 29.99 € incl. VAT billed yearly; Premium 4.99 € per month i.e. 59.99 € incl. VAT billed yearly; Premium by boats (yearly incl. VAT): 1-5 59.90 €, 6-10 89.90 €, 11-25 149.90 €, 26-50 249.90 €, 51-100 449.90 €. US App Store in-app purchases: Ready4Sea Standard $39.99; Ready4Sea Premium $79.99
Salt & Wire CompanionMaciej Jan Karnowski, trading as Salt & Wire (Poland) · Android 7.0+ only; iOS in preparation, no date	✔	✔	✔	✔	✔	✔	?	✔	?	✘	?	?	~	freemium · PLUS subscription, Google Play, three-day trial; no labelled price published. Google's in-app purchase range for the listing is EUR 9.49 to EUR 28.99, not confirmed as the PLUS price
Siren Connected BoatYamaha Motor Co., Ltd. (Siren Marine) · iOS; Android; macOS (Apple M1 or later)	✘	✔	✘	~	~	~	?	~	?	~	✘	?	~	subscription · Siren 3 USD 299.99; Siren 3 Pro USD 799.99; wireless sensors USD 139.09 each; Shore Power Sensor Plug USD 72.79; 120V AC Shore Power Relay USD 69.67; 240V AC Shore Power Relay USD 101.91 · Siren Marine cellular plans (USD): Monthly $22.00/1 month; Seasonal $150.00/season; Annual $225.00/1 year; 3 Year Cellular $575.00; 5 Year Cellular $900.00. SirenSat Offshore (cellular also required): 1 year $350.00; 2 years $700.00; 3 years $1,050.00
TheBoatAppMarine Data Cloud Ltd · web; iOS; Android	~	✔	~	~	✔	✔	~	✔	~	✘	✔	~	✘	freemium · Free: €0. Essentials: €19 per license, billed yearly. Plus: €49 per license, billed yearly. Pro: €99 per license, billed yearly (theboatapp.com/pricing). US App Store lists no in-app purchases
TreMateAtlantic Voyager LLC · iOS; Android; web browser	~	✔	✔	✔	✔	✔	~	✔	~	✘	✘	~	✔	freemium · Basic FREE forever; Standard $5/year; Standard and Premium include a 30-day free trial; Premium $20/year; Account Transfer $100 one time, free with Premium
Volvo Penta Easy ConnectAB Volvo Penta · iOS; Android	✔	✔	✔	~	✘	✔	?	~	?	✔	✘	✔	✘	free app
Yacht Manager AppManagerApp d.o.o. · iOS; macOS (Apple M1 or later)	✘	~	✔	✔	~	✔	✔	✔	✔	✘	✔	~	✘	subscription · Vendor site: BOAT 1 $49.99/year; BOAT 2 $99.99/year; YACHT 6 $299.99/year; YACHT 12 $399.99/year. US App Store in-app purchases also list VESSEL 24 $599.99 and VESSEL 36 $799.99
YachtaraAD Internet Consulting BV, Belgium (founder Bart Schillebeeks) · web app live; Android live (ai.yachtara.app); iOS not yet released	✔	?	✔	✔	✔	✔	?	✔	?	✘	?	?	?	freemium · Free EUR 0; Essential EUR 15 per quarter (about EUR 5 a month); Premium EUR 39 per quarter (about EUR 13 a month); an AI tier is marked coming soon with no price. Billed quarterly or annually, incl. VAT
YACHTWAVEYachtWave (Durban Equity Holdings II, LLC) · iOS; Android; web	~	~	~	✔	✔	✔	✔	✔	~	✘	✔	?	✔	freemium · Vendor site, monthly billing: Personal $0/boat per month; Pro $39/boat per month; Ultimate $49/boat per month; Operations custom pricing; annual billing 'Save up to 17%'. US App Store lists no in-app purchases

The verdicts, one by one (16)

Documented

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Service schedule
Reminders
Engine-hours tracking
Engine hours read automatically
Certificate/document expiry alerts
Service intervals by miles or sailing hours

Documented, with a limit

Launch/haul-out checklists

Established absent

Parts/spares inventory
Document storage
Cost tracking

The maker does not say

none

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: free to download: chart, weather and position on any phone, and a guided tour and simulation of every tab (manual §38 and §40; store listing); the full app needs a Galvanic Voice aboard
Wearable: Galvanic Pulse bracelet (up to 16 per vessel): IP67 BLE 5.0 wristband with vibration motor, buzzer, LED and one button. Does: man-overboard alert when unheard for longer than the captain-set delay (from 10 s to 10 min, default 60 s) while under way; 'has left the boat' notice at anchor or in harbour; watch-reminder vibration with triple-tap acknowledge; rest and activity detection feeding the fatigue model (§27); can be paired to equipment such as a harness. Battery about 2 months, charges from USB. Limits: bodies, metal bulkheads, engine rooms and aluminium or steel hulls attenuate the BLE signal, so a sleeper lying on the arm can go unheard; every phone and tablet aboard with the Galvanic Sailing app acts as an extra listener for the Galvanic Pulse bracelets (Galvanic Pulse listening, §30). One Galvanic Voice is loud enough to wake the whole boat. People add more for convenience: with a unit close by, an alert can be silenced with a wave of the hand past it, wherever they are aboard. Range in metres not given in the manual. Manual describes no smartwatch app. (manual §23 to §34)

Boat Butlerfreemium · US App Store in-app purchase: business yearly $39.99

Documented

Every phone and tablet, no per-device fee
Service schedule
Reminders
Engine-hours tracking
Document storage
Engine hours read automatically
Service intervals by miles or sailing hours

Documented, with a limit

No subscription
Cost tracking

Established absent

none

The maker does not say

Works offline aboard
Parts/spares inventory
Certificate/document expiry alerts
Launch/haul-out checklists

Alarm runs on: the phone, tablet or computer running the app
Free tier: Listing: 'Free access to premium features. No credit card required.'
Wearable: none stated

Sources: [1] [2] [3] [4]

Boat Managersubscription · US App Store in-app purchases: Boat Manager Plus Annual $9.99; Boat Manager Plus Monthly $0.99

Documented

Works offline aboard
Service schedule
Reminders
Engine-hours tracking
Parts/spares inventory
Document storage
Cost tracking
Certificate/document expiry alerts

Documented, with a limit

Every phone and tablet, no per-device fee
Service intervals by miles or sailing hours

Established absent

No subscription
Engine hours read automatically

The maker does not say

Launch/haul-out checklists

Alarm runs on: the phone, tablet or computer running the app
Free tier: no free tier (everything free for first 30 days, then $0.99/month or $9.99/year)
Wearable: none stated

Sources: [1] [2] [3] [4]

Boating Suitesubscription · US App Store in-app purchases: Monthly Subscription $7.99; Annual Subscription $59.99

Documented

Works offline aboard
Cost tracking

Documented, with a limit

Every phone and tablet, no per-device fee
Engine-hours tracking
Document storage

Established absent

No subscription
Service schedule
Reminders
Parts/spares inventory
Engine hours read automatically
Certificate/document expiry alerts
Service intervals by miles or sailing hours

The maker does not say

Launch/haul-out checklists

Wearable: none stated

Sources: [1] [2] [3]

BoatMateysubscription · US App Store in-app purchases: BoatMatey Pro – Annual $39.99; BoatMatey Monthly $4.99

Documented

Every phone and tablet, no per-device fee
Service schedule
Reminders
Engine-hours tracking
Document storage
Cost tracking
Service intervals by miles or sailing hours

Documented, with a limit

Works offline aboard
Parts/spares inventory
Certificate/document expiry alerts

Established absent

No subscription
Engine hours read automatically

The maker does not say

Launch/haul-out checklists

Alarm runs on: the phone, tablet or computer running the app
Free tier: no free tier (free trial, then monthly/yearly subscription)
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

LookOverfreemium · Vendor site: Free $0 forever; Premium $24.99/year or $99.99 one-time lifetime. US App Store in-app purchases: LookOver Pro – Annual $24.99; LookOver Pro – Monthly $3.99; LookOver Pro – Lifetime Access $99.99

Documented

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Reminders
Engine-hours tracking
Certificate/document expiry alerts
Service intervals by miles or sailing hours

Documented, with a limit

Service schedule
Document storage
Cost tracking
Launch/haul-out checklists

Established absent

Engine hours read automatically

The maker does not say

Parts/spares inventory

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: push
Free tier: Free: one machine with full service logging, reminders by hours/miles/date, recall alerts with push, registration/permit/inspection tracking, fuel log, 3 files per service, PDF service history, offline with sync
Wearable: Apple Watch ride tracking 'no phone required' (Pro only, per App Store listing); boat use of the watch not described

Sources: [1] [2] [3] [4] [5] [6]

Mercury Marinefree

Documented

No subscription
Every phone and tablet, no per-device fee
Service schedule
Reminders
Engine-hours tracking
Engine hours read automatically
Service intervals by miles or sailing hours

Documented, with a limit

Works offline aboard

Established absent

Document storage
Certificate/document expiry alerts

The maker does not say

Parts/spares inventory
Cost tracking
Launch/haul-out checklists

Free tier: free app (no paid tier); free to install for any Mercury owner; engine data needs SmartCraft Connect or VesselView Mobile hardware
Wearable: none stated

Sources: [1] [2] [3] [4]

Ready4Seafreemium · Vendor site: Basic free; Standard 2.49 € per month i.e. 29.99 € incl. VAT billed yearly; Premium 4.99 € per month i.e. 59.99 € incl. VAT billed yearly; Premium by boats (yearly incl. VAT): 1-5 59.90 €, 6-10 89.90 €, 11-25 149.90 €, 26-50 249.90 €, 51-100 449.90 €. US App Store in-app purchases: Ready4Sea Standard $39.99; Ready4Sea Premium $79.99

Documented

No subscription
Service schedule
Reminders
Engine-hours tracking
Document storage
Cost tracking
Launch/haul-out checklists

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard
Parts/spares inventory
Certificate/document expiry alerts
Service intervals by miles or sailing hours

Established absent

Engine hours read automatically

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: push, email
Free tier: Basic (free): 1 unit, up to 2 users, up to 30 pieces of equipment, 100 MB document storage, personal calendar subscription, web interface free for the 1st month
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6]

Documented

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Service schedule
Reminders
Engine-hours tracking
Document storage

Documented, with a limit

Service intervals by miles or sailing hours

Established absent

Engine hours read automatically

The maker does not say

Parts/spares inventory
Cost tracking
Certificate/document expiry alerts
Launch/haul-out checklists

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2]

Documented

Every phone and tablet, no per-device fee

Documented, with a limit

Service schedule
Reminders
Engine-hours tracking
Document storage
Engine hours read automatically
Service intervals by miles or sailing hours

Established absent

No subscription
Works offline aboard
Certificate/document expiry alerts

The maker does not say

Parts/spares inventory
Cost tracking
Launch/haul-out checklists

Alarm runs on: a device fitted aboard
Free tier: App free: store outboard info, track maintenance, service reminders by warranty or engine hours; monitoring, control and tracking need a Siren 3 Pro and a paid Siren Marine plan
Wearable: Apple Watch (App Store listing: 'You can also use our app on your Apple Watch!') and Wear OS (Google Play listing); watch functions not detailed; Siren features need a Siren main device on the boat

Sources: [1] [2] [3] [4] [5] [6] [7] [8]

Documented

Every phone and tablet, no per-device fee
Reminders
Engine-hours tracking
Document storage
Certificate/document expiry alerts

Documented, with a limit

No subscription
Works offline aboard
Service schedule
Parts/spares inventory
Cost tracking
Launch/haul-out checklists

Established absent

Engine hours read automatically
Service intervals by miles or sailing hours

The maker does not say

none

Free tier: Free (€0): 1 boat, logbook, inventory, tasks, checklists, 30 alerts, files & documents, 300MB, mobile apps (online)
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6]

TreMatefreemium · Basic FREE forever; Standard $5/year; Standard and Premium include a 30-day free trial; Premium $20/year; Account Transfer $100 one time, free with Premium

Documented

Every phone and tablet, no per-device fee
Works offline aboard
Service schedule
Reminders
Engine-hours tracking
Document storage
Service intervals by miles or sailing hours

Documented, with a limit

No subscription
Parts/spares inventory
Cost tracking
Launch/haul-out checklists

Established absent

Engine hours read automatically
Certificate/document expiry alerts

The maker does not say

none

Alarm runs on: n/a (no alarms)
Free tier: Basic plan free forever: track maintenance, store manuals, current services, smart search, checklists, notes, web access, unlimited storage, data backup
Wearable: none stated

Sources: [1] [2] [3] [4]

Volvo Penta Easy Connectfree app

Documented

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Engine-hours tracking
Engine hours read automatically
Launch/haul-out checklists

Documented, with a limit

Service schedule
Document storage

Established absent

Reminders
Certificate/document expiry alerts
Service intervals by miles or sailing hours

The maker does not say

Parts/spares inventory
Cost tracking

Free tier: free app (no paid tier); Easy Connect hardware required
Wearable: none stated

Sources: [1] [2] [3] [4]

Yacht Manager Appsubscription · Vendor site: BOAT 1 $49.99/year; BOAT 2 $99.99/year; YACHT 6 $299.99/year; YACHT 12 $399.99/year. US App Store in-app purchases also list VESSEL 24 $599.99 and VESSEL 36 $799.99

Documented

Works offline aboard
Service schedule
Engine-hours tracking
Parts/spares inventory
Document storage
Cost tracking
Certificate/document expiry alerts

Documented, with a limit

Every phone and tablet, no per-device fee
Reminders
Launch/haul-out checklists

Established absent

No subscription
Engine hours read automatically
Service intervals by miles or sailing hours

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: push
Free tier: no free tier (paid plans; free trial period)
Wearable: Apple Watch: App Store listing includes Apple Watch among supported devices; watch functions not described

Sources: [1] [2] [3] [4] [5]

Documented

No subscription
Works offline aboard
Service schedule
Reminders
Engine-hours tracking
Document storage

Established absent

Engine hours read automatically

The maker does not say

Every phone and tablet, no per-device fee
Parts/spares inventory
Cost tracking
Certificate/document expiry alerts
Launch/haul-out checklists
Service intervals by miles or sailing hours

Free tier: Free EUR 0 plan; contents not stated

Sources: [1] [2] [3]

YACHTWAVEfreemium · Vendor site, monthly billing: Personal $0/boat per month; Pro $39/boat per month; Ultimate $49/boat per month; Operations custom pricing; annual billing 'Save up to 17%'. US App Store lists no in-app purchases

Documented

Service schedule
Reminders
Engine-hours tracking
Parts/spares inventory
Document storage
Certificate/document expiry alerts
Service intervals by miles or sailing hours

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Cost tracking

Established absent

Engine hours read automatically

The maker does not say

Launch/haul-out checklists

Alarm runs on: the phone, tablet or computer running the app
Alerts ashore: push, email, SMS
Free tier: Personal Edition: free for personal, recreational use
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6]

Category

Sailing performance

On a phone the comparison grid is replaced by the verdicts below, one per app, which carry the same marks in words. The grid is there on a wider screen.

The specialists that document the most of this table: Adrena Standard, Expedition and qtVlm. What the Galvanic Sailing app documents that the others mostly do not: Sea-state filter on performance data (documented, fully or in part, by 2 of 12 others).

12 apps compared with ours on 15 features.

App	Alerts spoken aloud	No subscription	Every phone and tablet, no per-device fee	Works offline aboard	Polars	Target speeds	Laylines	Start line / race timer	Sail selection/crossover	Performance logging	Learns polars from own sailing data	Race replay/analysis	VMG (velocity made good)	Sea-state filter on performance data	Motorsailing detection	Price, as published
Galvanic Sailing appGalvanic Works S.L. · Android 7.0+ on Google Play; iOS 15.5+ on the App Store; phones and tablets	✘	✔	✔	✔	✔	✘	✘	✘	~	✔	✔	~	✔	✔	✔	free to download; the full app with a Galvanic Voice aboard · Galvanic Voice €1,149.50 incl. 21% Spanish VAT (€950 ex-VAT) · chart, weather and position free on any phone, and a guided tour and simulation of every tab; no subscription; official nautical charts, when offered, will be a paid extra charged per boat
Adrena StandardAdrena · Windows	?	✔	✘	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✘	~	one-off · Pack Adrena Standard CMap €1,837.50 / SnMap €1,679.17 tax excl.; €815 and €1,630 are only the Off Version and Desk Version, both not connectable to instruments
ExpeditionTasman Bay Navigation Systems Ltd. · Windows	?	✔	~	✔	✔	✔	✔	✔	✔	✔	~	✔	✔	~	✘	one-off · Licence €1250 (one-off); upgrade of licence bought before 1 Jan 2024 €275; LL1 Radar licence €1150; LL2 Radar licence €1850 (expeditionmarine.com/sales)
iRegatta 2Zifigo · iPadOS; macOS (Apple silicon); visionOS	?	✘	~	~	✔	✔	✔	✔	✔	✔	✔	✔	?	?	?	subscription · 1 year of iRegatta 2 $12.99 (US App Store IAP)
iRegatta ProZifigo · iOS; iPadOS; macOS (Apple silicon); watchOS; visionOS	~	✔	?	~	✔	✔	✔	✔	~	✔	✔	~	✔	✘	✘	one-off · App $19.99; IAP: Apple Watch integration $2.99; iRegatta Pro Race Analysis $3.99; iRegatta Pro Sailplan $1.99; eyeRegatta sync $1.99 (US App Store)
Pathfinder SailingPathfinder Sailing LLC · iOS; watchOS	?	✘	~	?	~	✔	✔	✔	✘	✔	✘	✔	~	✘	✘	subscription · Monthly Basic Subscription $14.99; Monthly Subscription $29.99; Yearly Subscription $299.00 (US App Store IAP)
qtVlmMeltemus SAS · Windows, macOS, Linux, Raspberry Pi (free); iOS, Android, Windows tablet (free basic, paid full version)	✘	✔	~	~	✔	~	✔	✔	✔	✔	✘	✔	✔	✔	✔	free (desktop); one-off (mobile full version) · in euros: full version €59.99 (App Store, Germany) · Desktop (Windows, macOS, Linux, Raspberry): free; mobile basic version free, Full version in-app purchase: $49.99 (App Store US); donations optional (€10-€500)
RaceQsRaceQs · web (raceqs.com); the iOS and Android apps the maker links to are no longer in either store (checked 5 Oct 2026)	?	✔	~	~	~	?	?	~	✘	✔	~	✔	✔	✘	✘	free · Free (raceqs.com)
SailRacerSailRacer · Android; iOS; smartwatch; SailRacer InkDisplay	?	~	~	~	✔	✔	✔	✔	✘	~	✘	?	✔	✘	✘	freemium · Premium subscription 35€ annual, in-app (sailracer.net)
SailTimerSailTimer Inc. · iOS; iPadOS; visionOS	~	✔	✔	✔	✔	?	✔	?	~	~	✔	✔	✘	✘	~	freemium · €305.19 (wi-rb.com) · IAP: SailTimer Pro Bundle $7.99; Wind Animation $2.99; WNI Marine Weather Map $2.99; Navionics Charts $10.99; regional charts $15.99 each; Import NMEA data $0.99 (US App Store)
TactiqsMarine Ventures LLC · iOS; iPadOS; watchOS	?	✘	~	~	✔	✔	✔	✔	✔	✔	~	✔	✔	?	?	subscription · AR Glasses $399 one-time + $99.95/glasses annual (tactiqs.io) · Race Boat w/ Instruments $199.95/boat annual; Race Boat w/o Instruments $99.95/boat annual; Cruising Pack $159.95/boat annual; Weather Routing Add-on $99.95/account annual (tactiqs.io)
Vakaros Atlas 2 + Vakaros ConnectVakaros · Standalone instrument; iOS (Vakaros Connect)	?	✔	✔	~	✘	?	?	✔	✘	✔	✘	~	✔	✘	✘	free app · $1,249.00 USD (vakaros.com) · Vakaros Connect app free (US App Store). RaceSense Annual Pass and Monthly Pass listed without prices (race management).
Velocitek ProStartVelocitek · Standalone instrument	?	✔	✘	✔	✘	?	?	✔	✘	✔	✘	~	✘	✘	✘	one-off · $795 (velocitek.com)

The verdicts, one by one (13)

Documented

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Polars
Performance logging
Learns polars from own sailing data
VMG (velocity made good)
Sea-state filter on performance data
Motorsailing detection

Documented, with a limit

Sail selection/crossover
Race replay/analysis

Established absent

Alerts spoken aloud
Target speeds
Laylines
Start line / race timer

The maker does not say

none

Alarm runs on: a device fitted aboard
Alerts ashore: push
Free tier: free to download: chart, weather and position on any phone, and a guided tour and simulation of every tab (manual §38 and §40; store listing); the full app needs a Galvanic Voice aboard
Wearable: Galvanic Pulse bracelet (up to 16 per vessel): IP67 BLE 5.0 wristband with vibration motor, buzzer, LED and one button. Does: man-overboard alert when unheard for longer than the captain-set delay (from 10 s to 10 min, default 60 s) while under way; 'has left the boat' notice at anchor or in harbour; watch-reminder vibration with triple-tap acknowledge; rest and activity detection feeding the fatigue model (§27); can be paired to equipment such as a harness. Battery about 2 months, charges from USB. Limits: bodies, metal bulkheads, engine rooms and aluminium or steel hulls attenuate the BLE signal, so a sleeper lying on the arm can go unheard; every phone and tablet aboard with the Galvanic Sailing app acts as an extra listener for the Galvanic Pulse bracelets (Galvanic Pulse listening, §30). One Galvanic Voice is loud enough to wake the whole boat. People add more for convenience: with a unit close by, an alert can be silenced with a wave of the hand past it, wherever they are aboard. Range in metres not given in the manual. Manual describes no smartwatch app. (manual §23 to §34)

Adrena Standardone-off · Pack Adrena Standard CMap €1,837.50 / SnMap €1,679.17 tax excl.; €815 and €1,630 are only the Off Version and Desk Version, both not connectable to instruments

Documented

No subscription
Works offline aboard
Polars
Target speeds
Laylines
Start line / race timer
Sail selection/crossover
Performance logging
Learns polars from own sailing data
Race replay/analysis
VMG (velocity made good)

Documented, with a limit

Motorsailing detection

Established absent

Every phone and tablet, no per-device fee
Sea-state filter on performance data

The maker does not say

Alerts spoken aloud

Alarm runs on: the phone, tablet or computer running the app
Wearable: none stated

Sources: [1] [2] [3] [4]

Expeditionone-off · Licence €1250 (one-off); upgrade of licence bought before 1 Jan 2024 €275; LL1 Radar licence €1150; LL2 Radar licence €1850 (expeditionmarine.com/sales)

Documented

No subscription
Works offline aboard
Polars
Target speeds
Laylines
Start line / race timer
Sail selection/crossover
Performance logging
Race replay/analysis
VMG (velocity made good)

Documented, with a limit

Every phone and tablet, no per-device fee
Learns polars from own sailing data
Sea-state filter on performance data

Established absent

Motorsailing detection

The maker does not say

Alerts spoken aloud

Wearable: none stated

Sources: [1] [2] [3]

iRegatta 2subscription · 1 year of iRegatta 2 $12.99 (US App Store IAP)

Documented

Polars
Target speeds
Laylines
Start line / race timer
Sail selection/crossover
Performance logging
Learns polars from own sailing data
Race replay/analysis

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard

Established absent

No subscription

The maker does not say

Alerts spoken aloud
VMG (velocity made good)
Sea-state filter on performance data
Motorsailing detection

Free tier: no free tier (free download; subscription required to use)
Wearable: none stated

Sources: [1] [2] [3]

iRegatta Proone-off · App $19.99; IAP: Apple Watch integration $2.99; iRegatta Pro Race Analysis $3.99; iRegatta Pro Sailplan $1.99; eyeRegatta sync $1.99 (US App Store)

Documented

No subscription
Polars
Target speeds
Laylines
Start line / race timer
Performance logging
Learns polars from own sailing data
VMG (velocity made good)

Documented, with a limit

Alerts spoken aloud
Works offline aboard
Sail selection/crossover
Race replay/analysis

Established absent

Sea-state filter on performance data
Motorsailing detection

The maker does not say

Every phone and tablet, no per-device fee

Alarm runs on: the phone, tablet or computer running the app
Free tier: no free tier ($19.99 paid app)
Wearable: Apple Watch app (IAP $2.99): race view with lift indicator, SOG/COG, max speed; control start countdown and ping boat/pin ends; tracks sailing as a HealthKit workout. Connects to iPhone only (not iPad); if not connected for >10 s, standalone mode on Series 2+ uses watch GPS for COG/SOG and countdown, but line ping and lift indicator need the iPhone. Also Pebble smartwatch support

Sources: [1] [2] [3]

Pathfinder Sailingsubscription · Monthly Basic Subscription $14.99; Monthly Subscription $29.99; Yearly Subscription $299.00 (US App Store IAP)

Documented

Target speeds
Laylines
Start line / race timer
Performance logging
Race replay/analysis

Documented, with a limit

Every phone and tablet, no per-device fee
Polars
VMG (velocity made good)

Established absent

No subscription
Sail selection/crossover
Learns polars from own sailing data
Sea-state filter on performance data
Motorsailing detection

The maker does not say

Alerts spoken aloud
Works offline aboard

Alarm runs on: the phone, tablet or computer running the app
Free tier: no free tier (14-day free trial, then monthly/annual subscription)
Wearable: Apple Watch companion app: same real-time Start, Speed, Course, Wind and Tidal Current information on the wrist; Navigate screen shows range/bearing to next mark and port/starboard times; connects to the iPhone app via WiFi and Bluetooth so the phone can stay below decks

Sources: [1] [2] [3] [4]

Documented

No subscription
Polars
Laylines
Start line / race timer
Sail selection/crossover
Performance logging
Race replay/analysis
VMG (velocity made good)
Sea-state filter on performance data
Motorsailing detection

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard
Target speeds

Established absent

Alerts spoken aloud
Learns polars from own sailing data

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app
Free tier: Free on Windows/macOS/Linux/Raspberry; free basic mobile version (full GRIB viewer, basic charts, simple instruments, Anchor Alarm module, NMEA/GPS input); full version via IAP
Wearable: none stated

Sources: [1] [2] [3] [4] [5]

RaceQsfree · Free (raceqs.com)

Documented

No subscription
Performance logging
Race replay/analysis
VMG (velocity made good)

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard
Polars
Start line / race timer
Learns polars from own sailing data

Established absent

Sail selection/crossover
Sea-state filter on performance data
Motorsailing detection

The maker does not say

Alerts spoken aloud
Target speeds
Laylines

Alarm runs on: the phone, tablet or computer running the app
Free tier: free ('Fleet Race Replay Free For Everyone')
Wearable: Garmin watch app (vívoactive HR, via Garmin Connect Mobile): start timer with distance to line and line bias; boat speed, course and VMG; GPS navigation to marks; wind shift monitoring; vibrating alerts approaching a layline, when OCS, and tack analysis. Vendor lists 30 m waterproof and 5 days battery (watch hardware)

Sources: [1] [2] [3]

SailRacerfreemium · Premium subscription 35€ annual, in-app (sailracer.net)

Documented

Polars
Target speeds
Laylines
Start line / race timer
VMG (velocity made good)

Documented, with a limit

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Performance logging

Established absent

Sail selection/crossover
Learns polars from own sailing data
Sea-state filter on performance data
Motorsailing detection

The maker does not say

Alerts spoken aloud
Race replay/analysis

Free tier: Free version available; Premium €35/year in-app (which features are Premium not stated)
Wearable: Site title lists 'Watch' among platforms; watch functions not described on pages read

Sources: [1] [2] [3] [4]

SailTimerfreemium · €305.19 (wi-rb.com) · IAP: SailTimer Pro Bundle $7.99; Wind Animation $2.99; WNI Marine Weather Map $2.99; Navionics Charts $10.99; regional charts $15.99 each; Import NMEA data $0.99 (US App Store)

Documented

No subscription
Every phone and tablet, no per-device fee
Works offline aboard
Polars
Laylines
Learns polars from own sailing data
Race replay/analysis

Documented, with a limit

Alerts spoken aloud
Sail selection/crossover
Performance logging
Motorsailing detection

Established absent

VMG (velocity made good)
Sea-state filter on performance data

The maker does not say

Target speeds
Start line / race timer

Alarm runs on: the phone, tablet or computer running the app
Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6]

Tactiqssubscription · AR Glasses $399 one-time + $99.95/glasses annual (tactiqs.io) · Race Boat w/ Instruments $199.95/boat annual; Race Boat w/o Instruments $99.95/boat annual; Cruising Pack $159.95/boat annual; Weather Routing Add-on $99.95/account annual (tactiqs.io)

Documented

Polars
Target speeds
Laylines
Start line / race timer
Sail selection/crossover
Performance logging
Race replay/analysis
VMG (velocity made good)

Documented, with a limit

Every phone and tablet, no per-device fee
Works offline aboard
Learns polars from own sailing data

Established absent

No subscription

The maker does not say

Alerts spoken aloud
Sea-state filter on performance data
Motorsailing detection

Free tier: iOS app free as an NMEA data repeater; new users get a 45-day free trial account
Wearable: Tactiqs AR sunglasses (Everysight Maverick hardware) replicate any metrics in three numerical and three graphical layouts plus AIS radar and chart plotter; connect to the iPhone (hotspot mode recommended for foiling boats). Apple watchOS companion app for the helmsman; watch functions not detailed

Sources: [1] [2] [3]

Vakaros Atlas 2 + Vakaros Connectfree app · $1,249.00 USD (vakaros.com) · Vakaros Connect app free (US App Store). RaceSense Annual Pass and Monthly Pass listed without prices (race management).

Documented

No subscription
Every phone and tablet, no per-device fee
Start line / race timer
Performance logging
VMG (velocity made good)

Documented, with a limit

Works offline aboard
Race replay/analysis

Established absent

Polars
Sail selection/crossover
Learns polars from own sailing data
Sea-state filter on performance data
Motorsailing detection

The maker does not say

Alerts spoken aloud
Target speeds
Laylines

Wearable: none stated

Sources: [1] [2] [3] [4] [5] [6]

Velocitek ProStartone-off · $795 (velocitek.com)

Documented

No subscription
Works offline aboard
Start line / race timer
Performance logging

Documented, with a limit

Race replay/analysis

Established absent

Every phone and tablet, no per-device fee
Polars
Sail selection/crossover
Learns polars from own sailing data
VMG (velocity made good)
Sea-state filter on performance data
Motorsailing detection

The maker does not say

Alerts spoken aloud
Target speeds
Laylines

Wearable: none stated

Sources: [1] [2]

Category

Crew fatigue & sleep

On a phone the comparison grid is replaced by the verdicts below, one per app, which carry the same marks in words. The grid is there on a wider screen.

None of the other products here documents any of this table's features in full. What the Galvanic Sailing app documents that the others mostly do not: Alarm sounds from hardware aboard, not the phone (documented, fully or in part, by 0 of 10 others); Fatigue level shown per crew member (documented, fully or in part, by 0 of 10 others); Fatigue projected to the next watch (documented, fully or in part, by 1 of 10 others); Sea state counted in fatigue (documented, fully or in part, by 0 of 10 others).

10 apps compared with ours on 5 features.

App	Alarm sounds from hardware aboard, not the phone	Sleep measured by a wearable	Fatigue level shown per crew member	Fatigue projected to the next watch	Sea state counted in fatigue	Price, as published
Galvanic Sailing appGalvanic Works S.L. · Android 7.0+ on Google Play; iOS 15.5+ on the App Store; phones and tablets	✔	✘	✔	✔	✔	free to download; the full app with a Galvanic Voice aboard · Galvanic Voice €1,149.50 incl. 21% Spanish VAT (€950 ex-VAT) · chart, weather and position free on any phone, and a guided tour and simulation of every tab; no subscription; official nautical charts, when offered, will be a paid extra charged per boat
ISF Watchkeeper 4 (Mobile)IT Energy Systems & Consulting Limited (with International Chamber of Shipping) · iOS; Android; web	✘	✘	✘	~	✘	App download: Free (US App Store), no in-app purchases listed; ISF Watchkeeper 4 licence price not published (trial on request)
Sailboat Passage Planner (PassageCalc) · web	?	?	?	?	?	free · Free (web tool)
SailWatchProJames Bistis · iOS (iPhone, iPad); watchOS; macOS (Apple silicon); web portal	✘	?	?	?	?	subscription · Performance and Grand Prix tiers: price not yet published; Beta: invitation only (licensed per boat, annual; covers all crew devices)
Total SuperyachtSuperyacht Operating Systems Pty Ltd · iOS; iPadOS; macOS (Apple M1 or later); visionOS	✘	?	?	?	?	subscription · Private Yacht (Non-ISM) €250/month; Mini ISM €300/month; Full ISM €375/month, per vessel, cloud based; fleet pricing on request; app download free
Watch Schedule Planner (WorkHarbor)WorkHarbor · web	✘	?	?	?	?	free · Free (web tool; site describes 'free calculators for seafarers')
WatchBellDeligent LLC · Android	✘	?	?	?	?	free · Free on Google Play (US); listing says no account, no subscription, no ads
WatchKeeper (mywatchkeeper.app) · iOS (iPhone); watchOS (Apple Watch companion)	✘	?	?	?	?	no published price
Watchkeeper AppEdward McCreary · iOS; macOS (Apple M1 or later); visionOS	✘	?	?	?	?	one-off · $5.99 (US App Store); no in-app purchases listed
Yacht WatchkeeperRoebuck AI Agency Ltd · web (installable web app on iPhone/iPad via Safari and Android via Chrome)	✘	?	?	?	?	subscription · ≤20 crew: £375/month; ≤40 crew: £525/month; ≤80 crew: £675/month (billed per vessel, prices exclude VAT; yachtwatchkeeper.com/pricing, read 5 Oct 2026)
Yachtly Crew Watch SchedulerYachtly Crew · web	?	?	?	?	?	freemium · Free to start; premium plans for unlimited usage, price not published

The verdicts, one by one (11)

Documented

Alarm sounds from hardware aboard, not the phone
Fatigue level shown per crew member
Fatigue projected to the next watch
Sea state counted in fatigue

Established absent

Sleep measured by a wearable

The maker does not say

none

Alarm runs on: a device fitted aboard

Sources: manual §27 activity and fatigue monitoring; manual §45.2.2 fatigue projection at watch handover, §45.4 fatigue indicator; sea state in the fatigue model (§27)

ISF Watchkeeper 4 (Mobile)App download: Free (US App Store), no in-app purchases listed; ISF Watchkeeper 4 licence price not published (trial on request)

Documented

none

Documented, with a limit

Fatigue projected to the next watch

Established absent

Alarm sounds from hardware aboard, not the phone
Sleep measured by a wearable
Fatigue level shown per crew member
Sea state counted in fatigue

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2] [3] [4]

Sailboat Passage Planner (PassageCalc)free · Free (web tool)

Documented

none

Established absent

none

The maker does not say

Alarm sounds from hardware aboard, not the phone
Sleep measured by a wearable
Fatigue level shown per crew member
Fatigue projected to the next watch
Sea state counted in fatigue

Sources: [1]

SailWatchProsubscription · Performance and Grand Prix tiers: price not yet published; Beta: invitation only (licensed per boat, annual; covers all crew devices)

Documented

none

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Sleep measured by a wearable
Fatigue level shown per crew member
Fatigue projected to the next watch
Sea state counted in fatigue

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2] [3] [4]

Total Superyachtsubscription · Private Yacht (Non-ISM) €250/month; Mini ISM €300/month; Full ISM €375/month, per vessel, cloud based; fleet pricing on request; app download free

Documented

none

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Sleep measured by a wearable
Fatigue level shown per crew member
Fatigue projected to the next watch
Sea state counted in fatigue

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2] [3] [4]

Watch Schedule Planner (WorkHarbor)free · Free (web tool; site describes 'free calculators for seafarers')

Documented

none

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Sleep measured by a wearable
Fatigue level shown per crew member
Fatigue projected to the next watch
Sea state counted in fatigue

Alarm runs on: the phone, tablet or computer running the app

Sources: [1]

WatchBellfree · Free on Google Play (US); listing says no account, no subscription, no ads

Documented

none

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Sleep measured by a wearable
Fatigue level shown per crew member
Fatigue projected to the next watch
Sea state counted in fatigue

Alarm runs on: the phone, tablet or computer running the app

Sources: [1]

WatchKeeper (mywatchkeeper.app)no published price

Documented

none

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Sleep measured by a wearable
Fatigue level shown per crew member
Fatigue projected to the next watch
Sea state counted in fatigue

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2] [3] [4]

Watchkeeper Appone-off · $5.99 (US App Store); no in-app purchases listed

Documented

none

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Sleep measured by a wearable
Fatigue level shown per crew member
Fatigue projected to the next watch
Sea state counted in fatigue

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2] [3]

Yacht Watchkeepersubscription · ≤20 crew: £375/month; ≤40 crew: £525/month; ≤80 crew: £675/month (billed per vessel, prices exclude VAT; yachtwatchkeeper.com/pricing, read 5 Oct 2026)

Documented

none

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Sleep measured by a wearable
Fatigue level shown per crew member
Fatigue projected to the next watch
Sea state counted in fatigue

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2] [3] [4] [5] [6]

Yachtly Crew Watch Schedulerfreemium · Free to start; premium plans for unlimited usage, price not published

Documented

none

Established absent

none

The maker does not say

Alarm sounds from hardware aboard, not the phone
Sleep measured by a wearable
Fatigue level shown per crew member
Fatigue projected to the next watch
Sea state counted in fatigue

Sources: [1] [2]

Category

Crew aboard & ashore

On a phone the comparison grid is replaced by the verdicts below, one per app, which carry the same marks in words. The grid is there on a wider screen.

The specialists that document the most of this table: ACR OLAS: Marine Alert System, OLAS: Wireless Marine Safety / OLAS Marine – MOB Alert and Garmin OnBoard. What the Galvanic Sailing app documents that the others mostly do not: Spoken notice when someone leaves the boat (documented, fully or in part, by 0 of 12 others); Spoken notice when they come back (documented, fully or in part, by 0 of 12 others); Time ashore recorded (documented, fully or in part, by 0 of 12 others); People aboard recorded with each trip (documented, fully or in part, by 2 of 12 others).

12 apps compared with ours on 8 features.

App	Alarm sounds from hardware aboard, not the phone	Who is aboard, from wearables	Spoken notice when someone leaves the boat	Spoken notice when they come back	Time ashore recorded	Equipment tags tracked (harness or other item)	Alarm stays quiet at anchor and in harbour	People aboard recorded with each trip	Price, as published
Galvanic Sailing appGalvanic Works S.L. · Android 7.0+ on Google Play; iOS 15.5+ on the App Store; phones and tablets	✔	✔	✔	✔	✔	✔	✔	✔	free to download; the full app with a Galvanic Voice aboard · Galvanic Voice €1,149.50 incl. 21% Spanish VAT (€950 ex-VAT) · chart, weather and position free on any phone, and a guided tour and simulation of every tab; no subscription; official nautical charts, when offered, will be a paid extra charged per boat
1st MateMercury Marine LLC · iOS; Android	✔	~	✘	✘	✘	✘	~	✘	free app, paid hardware · USD 299.99 to 494.99 for the Mercury SmartCraft kit; 299.99 to 329.99 for other engine brands; passenger fob from 89.99 (mercurymarine.com)
ACR OLAS: Marine Alert SystemUltimate Sports Engineering Ltd (ACR Electronics brand) · iOS; Android	✔	✔	✘	✘	✘	✔	~	✘	free app · in euros: OLAS Tag €65 (olasmarine.com)
Alerte Secours SNSM (Anchor Alarm & Emergency Tides)X Labs Mobile · Android	✘	✘	✘	✘	✘	✘	✘	✘	free
Boat BeaconPocket Mariner Ltd. · iOS; iPadOS; watchOS; macOS (Apple silicon); Android	✘	?	?	?	?	?	?	?	one-off + optional subscription · in euros: €17.99, Anchor Watch and Man Overboard €5.99 (App Store, Germany) · App USD 14.99 one-off (App Store US); AIS Sharing subscription USD 5.99 monthly or USD 16.49 yearly; add-ons: Live View Upgrade USD 7.99, Anchor Watch and Man Overboard USD 4.99, NOAA US Marine Charts USD 9.99, UK & IE Marine Charts USD 12.99
Garmin OnBoardGarmin International Inc. (Olathe, Kansas, USA; parent Garmin Ltd., Switzerland) · dedicated hardware; user interface is a compatible Garmin chartplotter. No phone or tablet app.	✔	✔	?	?	?	~	~	?	one-off purchase, no subscription · USD 499.99 system; GOS 10 hub alone USD 399.99; extra tag USD 149.99. Chartplotter extra, roughly USD 1,000 to 10,199.99.
OLAS N2KOlas Marine / Exposure Marine (Ultimate Sports Engineering Ltd), Bury, West Sussex, UK · dedicated NMEA 2000 hub with a hard-wired control switch. Setup uses the free OLAS mobile app (iOS, Android), the same app as the phone-based OLAS entries.	✔	✔	✘	✘	?	?	~	?	one-off purchase, no subscription · in euros: OLAS N2K €335 (olasmarine.com) · GBP 375.00 UK; USD 300.00 US; EUR 335.00 DE. Extra tags GBP 50 / T2 GBP 65 / 4-pack GBP 180; N2K T-connector GBP 20; Extender GBP 100.
OLAS: Wireless Marine Safety / OLAS Marine – MOB AlertUltimate Sports Engineering Ltd (Olas Marine / Exposure Marine, UK) · iOS; Android; macOS (Apple silicon)	✔	✔	✘	✘	✘	✔	~	✘	free app · in euros: OLAS Tag €65 (olasmarine.com) · OLAS Tag £50; OLAS T2 £65; OLAS Tag 4 Pack £180; OLAS Core £110; OLAS Extender £100; OLAS Float-On £110; OLAS Guardian £270; OLAS Guardian and T2 £275; OLAS N2K £375 (GBP, olasmarine.com) · app free
OrcaOrca Technologies AS · iOS; iPadOS; watchOS; macOS (Apple M1 or later); Android; Orca Display	?	?	?	?	?	?	?	?	subscription · Orca Core 2 EUR 649; Orca Display 2 EUR 999; Charging Mount EUR 349 (getorca.com configurator, delivery to Europe) · Orca Plus EUR 49/year; Orca Smart Navigation EUR 149/year (help centre); App Store US in-app purchase list: Orca Plus USD 44.99, Orca Smart Navigation USD 159.99 and USD 89.99, Orca Subscription USD 129.00 (billing period not stated)
PredictWind Man OverboardPredictWind · watchOS (Apple Watch, available); iPhone (pending Apple review); Android (in development) – beta	✔	~	✘	✘	✘	✘	~	✘	subscription · DataHub Pro $599 (USD, predictwind.com) · PredictWind Professional required: $499/year (USD). Other tiers: Free $0; Basic $29/year; Standard $249/year
SeaGuardianSeaGuardian with The 24hr Solutions Group (App Store seller: 24HR Vehicle Solutions Ltd, UK) · iOS (App Store GB); maker says Google Play too	✘	✘	✘	✘	✘	✘	✘	~	freemium · App Store GB: app is a paid download £1.99 plus in-app purchase "SeaGuardian" £1.99; maker site: free account, Silver £1.99/month, Gold coming soon
SeaNavPocket Mariner Ltd. · iOS; iPadOS; watchOS; macOS (Apple silicon)	✘	?	?	?	?	?	?	?	freemium · in euros: Man Overboard and Anchor Watch €5.99, Pro features €10.99 (App Store, Italy) · In-app (US App Store), described by the maker as 1-year auto-renewing subscriptions, not one-off: Man Overboard & Anchor Watch $4.99; Pro Features $10.49-$14.99; charts $9.99-$26.99; Weather charts $4.99
Skipper: Boat & Sailing LogIvpeSoft · Android	✘	?	?	?	?	?	?	~	free

The verdicts, one by one (13)

Documented

Alarm sounds from hardware aboard, not the phone
Who is aboard, from wearables
Spoken notice when someone leaves the boat
Spoken notice when they come back
Time ashore recorded
Equipment tags tracked (harness or other item)
Alarm stays quiet at anchor and in harbour
People aboard recorded with each trip

Established absent

none

The maker does not say

none

Alarm runs on: a device fitted aboard

Sources: manual §26 (left the boat / came back, time off the boat recorded, MOB armed under way only), §29 equipment bracelets; manual §42 crew aboard per trip

1st Matefree app, paid hardware · USD 299.99 to 494.99 for the Mercury SmartCraft kit; 299.99 to 329.99 for other engine brands; passenger fob from 89.99 (mercurymarine.com)

Documented

Alarm sounds from hardware aboard, not the phone

Documented, with a limit

Who is aboard, from wearables
Alarm stays quiet at anchor and in harbour

Established absent

Spoken notice when someone leaves the boat
Spoken notice when they come back
Time ashore recorded
Equipment tags tracked (harness or other item)
People aboard recorded with each trip

The maker does not say

none

Alarm runs on: the app and a device fitted aboard

Sources: [1] [2] [3] [4]

ACR OLAS: Marine Alert Systemfree app · in euros: OLAS Tag €65 (olasmarine.com)

Documented

Alarm sounds from hardware aboard, not the phone
Who is aboard, from wearables
Equipment tags tracked (harness or other item)

Documented, with a limit

Alarm stays quiet at anchor and in harbour

Established absent

Spoken notice when someone leaves the boat
Spoken notice when they come back
Time ashore recorded
People aboard recorded with each trip

The maker does not say

none

Alarm runs on: the app and a device fitted aboard

Sources: [1] [2] [3] [4] [5] [6] [7]

Alerte Secours SNSM (Anchor Alarm & Emergency Tides)free

Documented

none

Established absent

Alarm sounds from hardware aboard, not the phone
Who is aboard, from wearables
Spoken notice when someone leaves the boat
Spoken notice when they come back
Time ashore recorded
Equipment tags tracked (harness or other item)
Alarm stays quiet at anchor and in harbour
People aboard recorded with each trip

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2]

Documented

none

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Who is aboard, from wearables
Spoken notice when someone leaves the boat
Spoken notice when they come back
Time ashore recorded
Equipment tags tracked (harness or other item)
Alarm stays quiet at anchor and in harbour
People aboard recorded with each trip

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2] [3] [4] [5]

Garmin OnBoardone-off purchase, no subscription · USD 499.99 system; GOS 10 hub alone USD 399.99; extra tag USD 149.99. Chartplotter extra, roughly USD 1,000 to 10,199.99.

Documented

Alarm sounds from hardware aboard, not the phone
Who is aboard, from wearables

Documented, with a limit

Equipment tags tracked (harness or other item)
Alarm stays quiet at anchor and in harbour

Established absent

none

The maker does not say

Spoken notice when someone leaves the boat
Spoken notice when they come back
Time ashore recorded
People aboard recorded with each trip

Alarm runs on: a device fitted aboard

Sources: [1] [2]

Documented

Alarm sounds from hardware aboard, not the phone
Who is aboard, from wearables

Documented, with a limit

Alarm stays quiet at anchor and in harbour

Established absent

Spoken notice when someone leaves the boat
Spoken notice when they come back

The maker does not say

Time ashore recorded
Equipment tags tracked (harness or other item)
People aboard recorded with each trip

Alarm runs on: the app and a device fitted aboard

Sources: [1] [2] [3]

Documented

Alarm sounds from hardware aboard, not the phone
Who is aboard, from wearables
Equipment tags tracked (harness or other item)

Documented, with a limit

Alarm stays quiet at anchor and in harbour

Established absent

Spoken notice when someone leaves the boat
Spoken notice when they come back
Time ashore recorded
People aboard recorded with each trip

The maker does not say

none

Alarm runs on: the app and a device fitted aboard

Sources: [1] [2] [3] [4] [5] [6] [7] [8]

Documented

none

Established absent

none

The maker does not say

Alarm sounds from hardware aboard, not the phone
Who is aboard, from wearables
Spoken notice when someone leaves the boat
Spoken notice when they come back
Time ashore recorded
Equipment tags tracked (harness or other item)
Alarm stays quiet at anchor and in harbour
People aboard recorded with each trip

Sources: [1] [2] [3] [4]

PredictWind Man Overboardsubscription · DataHub Pro $599 (USD, predictwind.com) · PredictWind Professional required: $499/year (USD). Other tiers: Free $0; Basic $29/year; Standard $249/year

Documented

Alarm sounds from hardware aboard, not the phone

Documented, with a limit

Who is aboard, from wearables
Alarm stays quiet at anchor and in harbour

Established absent

Spoken notice when someone leaves the boat
Spoken notice when they come back
Time ashore recorded
Equipment tags tracked (harness or other item)
People aboard recorded with each trip

The maker does not say

none

Alarm runs on: the app and a device fitted aboard

Sources: [1] [2] [3] [4] [5] [6] [7] [8] [9]

SeaGuardianfreemium · App Store GB: app is a paid download £1.99 plus in-app purchase "SeaGuardian" £1.99; maker site: free account, Silver £1.99/month, Gold coming soon

Documented

none

Documented, with a limit

People aboard recorded with each trip

Established absent

Alarm sounds from hardware aboard, not the phone
Who is aboard, from wearables
Spoken notice when someone leaves the boat
Spoken notice when they come back
Time ashore recorded
Equipment tags tracked (harness or other item)
Alarm stays quiet at anchor and in harbour

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2] [3] [4]

Documented

none

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Who is aboard, from wearables
Spoken notice when someone leaves the boat
Spoken notice when they come back
Time ashore recorded
Equipment tags tracked (harness or other item)
Alarm stays quiet at anchor and in harbour
People aboard recorded with each trip

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2] [3]

Skipper: Boat & Sailing Logfree

Documented

none

Documented, with a limit

People aboard recorded with each trip

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Who is aboard, from wearables
Spoken notice when someone leaves the boat
Spoken notice when they come back
Time ashore recorded
Equipment tags tracked (harness or other item)
Alarm stays quiet at anchor and in harbour

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2]

Category

Engine & fuel

On a phone the comparison grid is replaced by the verdicts below, one per app, which carry the same marks in words. The grid is there on a wider screen.

The specialists that document the most of this table: Maretron N2KView, WilhelmSK, NMEAremote and Orca. What the Galvanic Sailing app documents that the others mostly do not: Fuel stops detected automatically (documented, fully or in part, by 1 of 19 others); Engine alarms spoken aloud (documented, fully or in part, by 0 of 19 others).

19 apps compared with ours on 7 features.

App	Alarm sounds from hardware aboard, not the phone	Fuel stops detected automatically	Litres per nautical mile measured	Litres per engine hour measured	Oil pressure checked against revs and oil temperature	Port and starboard engines monitored separately	Engine alarms spoken aloud	Price, as published
Galvanic Sailing appGalvanic Works S.L. · Android 7.0+ on Google Play; iOS 15.5+ on the App Store; phones and tablets	✔	✔	✔	✔	✔	✔	✔	free to download; the full app with a Galvanic Voice aboard · Galvanic Voice €1,149.50 incl. 21% Spanish VAT (€950 ex-VAT) · chart, weather and position free on any phone, and a guided tour and simulation of every tab; no subscription; official nautical charts, when offered, will be a paid extra charged per boat
Garmin OnDeck (ActiveCaptain app)Garmin · iOS; Android	✔	✘	✘	~	✘	?	✘	subscription · OnDeck Hub USD 849.99 · Monthly Plan with Annual Contract USD 12.99/month (3-month promotion period); Monthly Plan USD 19.99/month (no contract)
LogBook – Digital Yacht LogMathias Matejcik · iOS; macOS (Apple silicon); visionOS	?	?	?	?	?	?	?	freemium · in euros: LogBook Pro €4.99, €39.99 or €89.99 (App Store, Germany) · US App Store in-app purchases: LogBook Pro $79.99; LogBook Pro $34.99; LogBook Pro $3.99 (billing periods not shown on listing)
Maretron N2KViewMaretron, now under Raymarine / Teledyne FLIR (store listings name Raymarine UK Limited; maretron.com still carries the Maretron brand, Jupiter, Florida) · PC; Mac; Maretron MBB300C, TSM800/800C/810C/1330/1330C; iPhone; iPad; Android	✔	?	✔	✔	~	✔	✘	app free; gateway, licences and modules sold through dealers · Maretron's product pages show no prices and sell licence keys 'via our dealer network'; its own 2023 US list price PDF (maretron.com, Maretron Brand Price List 7.1.23) gives the IPG100 gateway at $709 and N2KView for a PC at $695, and N2KView Mobile is free.
Mercury MarineMercury Marine LLC · iOS; Android	?	✘	?	~	~	✔	✘	free
Nautic Alert (Triton)Nautic Alert · iOS; Android	✔	?	?	?	?	?	?	subscription · Triton USD 1,995.00 MSRP; Insight X2 LTE USD 2,499 MSRP; Insight X2 Iridium USD 2,699 MSRP · Triton: Satellite & Cellular Standard USD 29.99/month; Satellite & Cellular Enhanced USD 39.99/month; Satellite & Cellular Extended USD 49.99/month
NaviLogFelix Bartschi · iOS; iPadOS; macOS (Apple silicon); visionOS	✘	?	?	?	?	?	?	freemium · in euros: Pro upgrade €7.99 (App Store, Germany) · US App Store in-app purchase: Pro Upgrade $6.99
Nebo – Boat Logging Made EasyNEBO GLOBAL PTY LTD · iOS; Android	✔	?	?	?	?	?	?	freemium · $249.00 USD (nebolink, listed out of stock) · Starter: free. Silver: $59.90 billed annually or $7.19 USD per month billed monthly. Gold: $109.99 billed annually or $13.90 USD per month billed monthly (nebo.global/membership; same prices as US App Store in-app purchases). US Google Play: $6.99 – $109.99 per item
NMEAremotezapfware · iOS (iPhone, iPad, Apple Watch)	✘	✘	✔	~	~	✔	✘	one-off · in euros: €24.99 (App Store, Germany) · USD 23.99 one-off, no subscriptions (App Store US); NMEAremote LITE USD 3.99
OpenCPNOpenCPN project (Android: Dave Register) · Windows; macOS; Linux; Raspberry Pi; Android	✘	✘	✘	✘	~	✔	✘	free (desktop); one-off (Android) · Desktop free; Android USD 9.95 one-off (Google Play US)
OrcaOrca Technologies AS · iOS; iPadOS; watchOS; macOS (Apple M1 or later); Android; Orca Display	?	✘	✔	✔	✘	✔	✘	subscription · Orca Core 2 EUR 649; Orca Display 2 EUR 999; Charging Mount EUR 349 (getorca.com configurator, delivery to Europe) · Orca Plus EUR 49/year; Orca Smart Navigation EUR 149/year (help centre); App Store US in-app purchase list: Orca Plus USD 44.99, Orca Smart Navigation USD 159.99 and USD 89.99, Orca Subscription USD 129.00 (billing period not stated)
Raymarine app + YachtSense LinkRaymarine · iOS and Android (maker's manual, May 2026)	✔	?	?	~	?	?	✘	subscription · in euros: YachtSense Link €1,295 ex-VAT (raymarine.com), One Boat plan €174.99 a year (App Store, Germany) · YachtSense Link USD 1,319.99 · In-app (US App Store): One Boat Monthly USD 19.99; One Boat Six Monthly USD 109.99; One Boat Yearly USD 199.99; Two Boats Monthly USD 37.99; Two Boats 6 Months USD 209.99; Two Boats 1 Year USD 399.99
SailloggerSaillogger · web; iOS; Android	✘	✘	✘	✘	~	✔	✘	subscription · Free for 45 days, then USD 7.99 per month or the local equivalent; no annual plan (saillogger.com)
SailsenseSailsense Analytics · Android; the iOS listing (id1459241207) was no longer on the App Store when checked, 24 Sep 2026	✔	✘	✘	✘	✘	?	✘	freemium · Basic: free; Starter €120/year; Pro €300/year
Sentinel (Sentinel Premium / Sentinel GO)Sentinel Marine Solutions · iOS; Android	✔	~	✘	?	✘	✔	✘	freemium · Bundles (EUR, incl. VAT): SafeGuard €699; Secure €819; Analog Engine Watch €769; Digital Engine Watch €1,179; Smart Comfort €1,359; SafeGuard Plus €1,259; Flagship €2,599; Custom on request · Sentinel GO app: free. Plan S €150/year; Plan M €224/year; Plan L €310/year (bundles include first year)
Siren Connected BoatYamaha Motor Co., Ltd. (Siren Marine) · iOS; Android; macOS (Apple M1 or later)	✔	✘	✘	~	~	~	✘	subscription · Siren 3 USD 299.99; Siren 3 Pro USD 799.99; wireless sensors USD 139.09 each; Shore Power Sensor Plug USD 72.79; 120V AC Shore Power Relay USD 69.67; 240V AC Shore Power Relay USD 101.91 · Siren Marine cellular plans (USD): Monthly $22.00/1 month; Seasonal $150.00/season; Annual $225.00/1 year; 3 Year Cellular $575.00; 5 Year Cellular $900.00. SirenSat Offshore (cellular also required): 1 year $350.00; 2 years $700.00; 3 years $1,050.00
Vesper Cortex (Cortex Onboard / Cortex Monitor)Garmin New Zealand Ltd (Vesper Marine) · NMEA 2000 and NMEA 0183 hub with built-in WiFi for up to 10 devices; iOS and Android apps	✔	?	?	?	?	?	?	freemium · Cortex M1 Hub $1,449.99 USD; Cortex V1 Hub $1,999.99 USD (garmin.com US) · Cortex Monitoring Plan (US): Free Plan (Monitor Lite); Monthly Plan $19.95 USD; Annual Plan $159.95 USD per year. US prices exclude state/local taxes; non-US prices include VAT; auto-renew
Volvo Penta Easy ConnectAB Volvo Penta · iOS; Android	?	?	✔	~	✘	✔	✘	free app
WilhelmSKScott Bender · iOS, iPadOS, Apple Watch, Apple TV, macOS	✔	✘	~	✔	✔	✔	✘	one-off · iOS USD 19.99 one-off; macOS USD 19.99 (App Store US)
YS ProYacht Sentinel · iOS; Android	✔	✘	✘	~	~	?	✘	subscription · YS PRO €1,590 excl. VAT & delivery · Zone EU and Zone US €20/month; Zone J and Zone I €25/month; Zone H €30/month; Zone A1 €50/month (yacht-sentinel.com/products/ys-pro, read 5 Oct 2026); the maker's support page states the standard fee as €10/month

The verdicts, one by one (20)

Documented

Alarm sounds from hardware aboard, not the phone
Fuel stops detected automatically
Litres per nautical mile measured
Litres per engine hour measured
Oil pressure checked against revs and oil temperature
Port and starboard engines monitored separately
Engine alarms spoken aloud

Established absent

none

The maker does not say

none

Alarm runs on: a device fitted aboard

Sources: manual §42 fuel stations, §44.7 multi-engine, §47.8 what the Galvanic Voice expects of the engine; manual §17.5, engine alerts

Garmin OnDeck (ActiveCaptain app)subscription · OnDeck Hub USD 849.99 · Monthly Plan with Annual Contract USD 12.99/month (3-month promotion period); Monthly Plan USD 19.99/month (no contract)

Documented

Alarm sounds from hardware aboard, not the phone

Documented, with a limit

Litres per engine hour measured

Established absent

Fuel stops detected automatically
Litres per nautical mile measured
Oil pressure checked against revs and oil temperature
Engine alarms spoken aloud

The maker does not say

Port and starboard engines monitored separately

Alarm runs on: a device fitted aboard

Sources: [1] [2] [3]

Documented

none

Established absent

none

The maker does not say

Alarm sounds from hardware aboard, not the phone
Fuel stops detected automatically
Litres per nautical mile measured
Litres per engine hour measured
Oil pressure checked against revs and oil temperature
Port and starboard engines monitored separately
Engine alarms spoken aloud

Sources: [1]

Documented

Alarm sounds from hardware aboard, not the phone
Litres per nautical mile measured
Litres per engine hour measured
Port and starboard engines monitored separately

Documented, with a limit

Oil pressure checked against revs and oil temperature

Established absent

Engine alarms spoken aloud

The maker does not say

Fuel stops detected automatically

Alarm runs on: a device fitted aboard

Sources: [1] [2] [3]

Mercury Marinefree

Documented

Port and starboard engines monitored separately

Documented, with a limit

Litres per engine hour measured
Oil pressure checked against revs and oil temperature

Established absent

Fuel stops detected automatically
Engine alarms spoken aloud

The maker does not say

Alarm sounds from hardware aboard, not the phone
Litres per nautical mile measured

Sources: [1] [2]

Documented

Alarm sounds from hardware aboard, not the phone

Established absent

none

The maker does not say

Fuel stops detected automatically
Litres per nautical mile measured
Litres per engine hour measured
Oil pressure checked against revs and oil temperature
Port and starboard engines monitored separately
Engine alarms spoken aloud

Alarm runs on: a device fitted aboard

Sources: [1] [2] [3]

NaviLogfreemium · in euros: Pro upgrade €7.99 (App Store, Germany) · US App Store in-app purchase: Pro Upgrade $6.99

Documented

none

Established absent

Alarm sounds from hardware aboard, not the phone

The maker does not say

Fuel stops detected automatically
Litres per nautical mile measured
Litres per engine hour measured
Oil pressure checked against revs and oil temperature
Port and starboard engines monitored separately
Engine alarms spoken aloud

Alarm runs on: the phone, tablet or computer running the app

Sources: [1]

Documented

Alarm sounds from hardware aboard, not the phone

Established absent

none

The maker does not say

Fuel stops detected automatically
Litres per nautical mile measured
Litres per engine hour measured
Oil pressure checked against revs and oil temperature
Port and starboard engines monitored separately
Engine alarms spoken aloud

Alarm runs on: a device fitted aboard

Sources: [1] [2] [3] [4] [5]

NMEAremoteone-off · in euros: €24.99 (App Store, Germany) · USD 23.99 one-off, no subscriptions (App Store US); NMEAremote LITE USD 3.99

Documented

Litres per nautical mile measured
Port and starboard engines monitored separately

Documented, with a limit

Litres per engine hour measured
Oil pressure checked against revs and oil temperature

Established absent

Alarm sounds from hardware aboard, not the phone
Fuel stops detected automatically
Engine alarms spoken aloud

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2] [3]

OpenCPNfree (desktop); one-off (Android) · Desktop free; Android USD 9.95 one-off (Google Play US)

Documented

Port and starboard engines monitored separately

Documented, with a limit

Oil pressure checked against revs and oil temperature

Established absent

Alarm sounds from hardware aboard, not the phone
Fuel stops detected automatically
Litres per nautical mile measured
Litres per engine hour measured
Engine alarms spoken aloud

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2] [3] [4] [5]

Documented

Litres per nautical mile measured
Litres per engine hour measured
Port and starboard engines monitored separately

Established absent

Fuel stops detected automatically
Oil pressure checked against revs and oil temperature
Engine alarms spoken aloud

The maker does not say

Alarm sounds from hardware aboard, not the phone

Sources: [1] [2] [3] [4] [5]

Documented

Alarm sounds from hardware aboard, not the phone

Documented, with a limit

Litres per engine hour measured

Established absent

Engine alarms spoken aloud

The maker does not say

Fuel stops detected automatically
Litres per nautical mile measured
Oil pressure checked against revs and oil temperature
Port and starboard engines monitored separately

Alarm runs on: a device fitted aboard

Sources: [1] [2] [3]

Sailloggersubscription · Free for 45 days, then USD 7.99 per month or the local equivalent; no annual plan (saillogger.com)

Documented

Port and starboard engines monitored separately

Documented, with a limit

Oil pressure checked against revs and oil temperature

Established absent

Alarm sounds from hardware aboard, not the phone
Fuel stops detected automatically
Litres per nautical mile measured
Litres per engine hour measured
Engine alarms spoken aloud

The maker does not say

none

Alarm runs on: the phone, tablet or computer running the app

Sources: [1] [2] [3]

Sailsensefreemium · Basic: free; Starter €120/year; Pro €300/year

Documented

Alarm sounds from hardware aboard, not the phone

Established absent

Fuel stops detected automatically
Litres per nautical mile measured
Litres per engine hour measured
Oil pressure checked against revs and oil temperature
Engine alarms spoken aloud

The maker does not say

Port and starboard engines monitored separately

Alarm runs on: a device fitted aboard

Sources: [1] [2] [3] [4] [5]

Documented

Alarm sounds from hardware aboard, not the phone
Port and starboard engines monitored separately

Documented, with a limit

Fuel stops detected automatically

Established absent

Litres per nautical mile measured
Oil pressure checked against revs and oil temperature
Engine alarms spoken aloud

The maker does not say

Litres per engine hour measured

Alarm runs on: a device fitted aboard

Sources: [1] [2] [3] [4]

Documented

Alarm sounds from hardware aboard, not the phone

Documented, with a limit

Litres per engine hour measured
Oil pressure checked against revs and oil temperature
Port and starboard engines monitored separately

Established absent

Fuel stops detected automatically
Litres per nautical mile measured
Engine alarms spoken aloud

The maker does not say

none

Alarm runs on: a device fitted aboard

Sources: [1] [2] [3] [4] [5] [6]

Documented

Alarm sounds from hardware aboard, not the phone

Established absent

none

The maker does not say

Fuel stops detected automatically
Litres per nautical mile measured
Litres per engine hour measured
Oil pressure checked against revs and oil temperature
Port and starboard engines monitored separately
Engine alarms spoken aloud

Alarm runs on: the app and a device fitted aboard

Sources: [1] [2] [3] [4] [5]

Volvo Penta Easy Connectfree app

Documented

Litres per nautical mile measured
Port and starboard engines monitored separately

Documented, with a limit

Litres per engine hour measured

Established absent

Oil pressure checked against revs and oil temperature
Engine alarms spoken aloud

The maker does not say

Alarm sounds from hardware aboard, not the phone
Fuel stops detected automatically

Sources: [1] [2] [3]

WilhelmSKone-off · iOS USD 19.99 one-off; macOS USD 19.99 (App Store US)

Documented

Alarm sounds from hardware aboard, not the phone
Litres per engine hour measured
Oil pressure checked against revs and oil temperature
Port and starboard engines monitored separately

Documented, with a limit

Litres per nautical mile measured

Established absent

Fuel stops detected automatically
Engine alarms spoken aloud

The maker does not say

none

Alarm runs on: the app and a device fitted aboard

Sources: [1] [2] [3] [4] [5]

Documented

Alarm sounds from hardware aboard, not the phone

Documented, with a limit

Litres per engine hour measured
Oil pressure checked against revs and oil temperature

Established absent

Fuel stops detected automatically
Litres per nautical mile measured
Engine alarms spoken aloud

The maker does not say

Port and starboard engines monitored separately

Alarm runs on: a device fitted aboard

Sources: [1] [2] [3] [4]

What it costs to run for 24 months

63 of the products here, ours included, do more than one job, so a buyer choosing one piece of hardware or one subscription can compare them directly. This table adds up what each one costs over two years. What each one does is in the category tables above; the review does not score or rank them.

How the figure is built. One-off purchases, hardware and licences, plus the cheapest recurring plan that keeps the features we compared, for two years, less any months of the plan the purchase includes. Where the free tier keeps every feature compared the recurring cost is nil. Where hardware is needed, the entry-level unit is used and named. Chart subscriptions are per region, so one region is counted and named. Products from European makers are priced in euros wherever the maker, or its euro App Store listing, gives a euro price for the same plan; the rest are in the maker’s own currency. Every figure is on the maker’s own tax basis, so some include VAT and some do not; ours is shown with VAT. The euro column is our arithmetic, at the European Central Bank reference rate of 22 September 2026 (1 EUR = 1.1463 USD = 0.8578 GBP); no maker publishes it. Where no total can be worked out from what the maker publishes, the row says why.

Apps that run on a phone, tablet or computer you already own

Product	Categories	24 months, as published	24 months, in euros	What the figure covers
Alerte Secours SNSM (Anchor Alarm & Emergency Tides)	2	€0.00	€0	free, ad supported
Aqua Map Boating	4	€59.96	€60	one chart region a year, Balearic Islands at €14.99, plus the Expert subscription, which carries AIS and AnchorLink; euro App Store prices
Boat Beacon	4	€23.98	€24	app plus the Anchor Watch and Man Overboard purchase; euro App Store prices
C-MAP App	2	$29.98	€26	Premium annual
Expedition	2	€1,250.00	€1,250	licence, one-off
iNavX	2	$19.98	€17	one chart subscription at the lowest price published ($9.99)
ISF Watchkeeper 4 (Mobile)	2	no total		licence price not published
LogBook – Digital Yacht Log	2	€79.98	€80	LogBook Pro at the euro App Store price that matches the US $34.99 tier; the listing says subscriptions renew, so it is counted for each year
LuckGrib	2	$149.97	€131	LuckGrib app plus the Weather Routing and Offshore Data purchases, all one-off; Offshore Data carries the satellite download
moodSailor	6	€0.00	€0	free, no in-app purchases
Météo Marine	2	no total		the maker does not say which of its account plans carries the features compared
NaviLog	2	€7.99	€8	Pro upgrade, one-off; euro App Store price
Navionics Boating	2	$99.98	€87	one chart region a year, at the lowest regional price published ($49.99, App Store US)
Nebo – Boat Logging Made Easy	2	$119.80	€105	Silver billed annually; the nebolink hardware is listed out of stock
NMEAremote	3	€24.99	€25	one-off purchase; euro App Store price
NV Charts	6	€99.80	€100	app free; one chart region a year
OpenCPN	5	$9.95	€9	free on desktop; the Android app is a one-off purchase
PredictWind	2	$797.00	€695	Standard plan, the tier that carries weather routing and departure planning, plus the entry-level DataHub the onboard sensor data needs
qtVlm	3	€59.99	€60	free on desktop; the mobile full version is a one-off purchase; euro App Store price
Sailboat Passage Planner (PassageCalc)	2	$0.00	€0	free web tool
Saillogger	2	$191.76	€167	$7.99 a month, no annual plan
SailWatchPro	2	no total		the maker has not yet published prices for its paid tiers
Salt & Wire Companion	8	no total		the PLUS subscription price is not published
Savvy Navvy	4	€238.00	€238	Elite plan, the tier that carries the anchor alarm and NMEA connection; euro App Store price without the Denmark and Italy charts
SeaGuardian	3	£49.75	€58	paid download plus Silver at £1.99 a month
SEAiq	3	$30.00	€26	SEAiq annual subscription
SeaNav	2	€33.96	€34	the Man Overboard and Anchor Watch purchase plus Pro features; euro App Store prices
Simrad: Companion for Boaters	4	no total		Navico publishes the Premium price only inside the app stores
Skipper: Boat & Sailing Log	2	$0.00	€0	free, no in-app purchases shown
Squid	2	€67.96	€68	Hi-Res Europe, yearly plan
TheBoatApp	2	€38.00	€38	Essentials, the tier that carries the offline apps
TIMEZERO TZ Navigator	4	€890.00	€890	TZ Navigator plus the Weather Routing module; the store does not state whether the licences are one-off, so each is counted once; charts extra
Total Superyacht	2	€6,000.00	€6,000	Private Yacht (non-ISM) at €250 a month per vessel
TZ iBoat	3	€131.96	€132	Essential plan, which carries AIS and the instrument connection, plus one chart region a year, Western Mediterranean; maker's and euro App Store prices
Watch Schedule Planner (WorkHarbor)	2	$0.00	€0	free web tool
WatchBell	2	$0.00	€0	free
WatchKeeper (mywatchkeeper.app)	2	no total		no price published
Watchkeeper App	2	$5.99	€5	one-off purchase
Waterkaarten	2	€111.98	€112	the 365-day credit, bought once a year
WilhelmSK	2	$19.99	€17	iOS one-off
Yacht Watchkeeper	2	£9,000.00	€10,492	£375 a month for up to 20 crew, ex-VAT; the maker prices in sterling only
Yachtara	5	no total		the maker does not say which of its plans carries the features compared
Yachtly Crew Watch Scheduler	2	no total		free to start; premium prices not published

Systems with hardware aboard

These need a box, a tag or an instrument on the boat, so the figure carries the purchase as well as the plan.

Product	Categories	24 months, as published	24 months, in euros	What the figure covers
Galvanic Sailing app	15	€1,149.50	€1,150	Galvanic Voice unit with two Galvanic Pulse bracelets as standard; the app is free to download. €950 ex-VAT, shown with 21% Spanish VAT. Needs an NMEA 2000 backbone with 12 V, and the boat's own instruments and AIS receiver for the features that read them, none of them included
1st Mate	2	$299.99	€262	entry-level 1st Mate kit, from $299.99; the app is free
ACR OLAS: Marine Alert System	2	€65.00	€65	one OLAS tag, maker's euro price; the app is free
Anchor Alert (PredictWind)	2	$497.00	€434	DataHub plus Anchor Pro yearly, the tier carrying the instrument alerts
Garmin OnBoard	2	no total		the system needs at least one compatible Garmin chartplotter to work, and the review does not price chartplotters; OnBoard itself is $499.99
Garmin OnDeck (ActiveCaptain app)	2	$1,122.78	€979	OnDeck hub plus the monthly plan on a 12-month contract at $12.99, free for the first three months
Maretron N2KView	5	$1,404.00	€1,225	the IPG100 gateway plus the N2KView licence key it must carry for alerts, at the maker's 2023 US list prices; N2KView Mobile itself is free
Mercury Marine	2	no total		free app; Mercury does not price the Bluetooth module that live data needs
Nautic Alert (Triton)	2	$2,714.76	€2,368	Triton plus the standard satellite and cellular plan at $29.99 a month
OLAS N2K	3	€335.00	€335	OLAS N2K system, one-off, maker's euro price
OLAS: Wireless Marine Safety / OLAS Marine – MOB Alert	2	€65.00	€65	one OLAS tag, maker's euro price; the app is free
Orca	9	€798.00	€798	Orca Core 2 (incl. VAT), plus Smart Navigation after the first year, which is included with the Core
PredictWind Man Overboard	2	$1,597.00	€1,393	DataHub Pro plus the Professional plan it requires
Raymarine app + YachtSense Link	2	€1,644.98	€1,645	YachtSense Link at the maker's euro price, which excludes VAT, plus the One Boat yearly plan at the euro App Store price
Sailsense	2	no total		Pro plan, the one that carries the alerts; the Hub price is not published
Sentinel (Sentinel Premium / Sentinel GO)	2	€919.00	€919	Analog Engine Watch bundle incl. VAT, the cheapest with remote switching, which this review credits; first year of the plan included, then €150 a year
Siren Connected Boat	3	$749.99	€654	Siren 3 and the annual cellular plan, which is mandatory
Vesper Cortex (Cortex Onboard / Cortex Monitor)	4	$1,769.89	€1,544	Cortex M1 hub plus the annual monitoring plan
Volvo Penta Easy Connect	2	no total		free app; the Easy Connect interface kit is sold through dealers, price not published by Volvo Penta
YS Pro	2	€1,830.00	€1,830	YS PRO ex-VAT plus the standard plan at €10 a month, as the maker's support page states it; its product page states €20 a month for the EU zone

The appendix: all the data behind this review

Every product and every mark with its sources, the rules every mark follows, and the apps we found and left out, each with its reason. The download is free and needs nothing from you. If you would also like our research updates by email, leave your address and tick the box; the PDF downloads either way.

About this review, and how to correct it

Who wrote this. This review was researched, written and published by Galvanic Works S.L., the manufacturer of Galvanic Voice, whose companion app, the Galvanic Sailing app, is one of the apps compared in it. Its prices and terms are at the top of this review, with their date. You should read our conclusions in that light, and check them.

How the marks were arrived at. Every mark for another maker’s product is taken from that manufacturer’s own published material, a product page, help centre, user manual, official app-store listing or the maker’s own advertising, posts and videos, as it stood at the date of publication. Our own marks are taken from the Galvanic Voice manual and our own published copy, the product page and the app’s store listing, and, where those have not yet caught up with the app, from our own dated statement, which the appendix gives with the mark’s sources. No app in this comparison was physically tested by us; this is a documentation review, not a sea trial. Where a manufacturer’s material does not address a question at all, the cell shows ?; where the absence is established, the cell shows ✘, which means either that the maker’s own complete feature list, tier table or manual settles that the feature is not there, or that we surveyed the whole category and established who has it. Spoken alerts are the second kind; where a maker’s own material could not be read in full, the cell stays ?.

Why it may already be out of date. Specifications, prices, subscription terms and feature sets change without notice, vary between markets, and are often published differently in different countries. Prices are shown on each manufacturer’s own basis and in its own currency, some inclusive and some exclusive of tax, and exclude shipping, installation and local duties. Nothing here is a quotation, an offer, or advice on which app to buy.

Tell us if we have got something wrong. Despite the care taken, we cannot exclude errors, omissions or claims that were accurate when written and are not now. If you are a manufacturer, distributor or reader who identifies anything inaccurate, please write to info@galvanicworks.com. Where you provide documentary evidence, a link to the manufacturer’s own current published material or an official statement, we undertake to review it within two working days of receipt, to reply, and to correct, update or remove any content it shows to be inaccurate, and to note the correction on this page. This applies whatever the correction does to our own app’s standing.

No warranty. This review is provided for general information only, on an “as is” basis. To the fullest extent permitted by applicable law, Galvanic Works S.L. (NIF B26774091, Polígono parcela 691, 3, 07430 Llubí, Illes Balears, Spain) gives no warranty, express or implied, as to the accuracy, completeness or currency of the information, and accepts no liability for any loss or damage arising from reliance on it. Nothing in this notice excludes or limits any liability that cannot lawfully be excluded or limited, including liability for death or personal injury caused by negligence, for fraud or fraudulent misrepresentation, for wilful misconduct or gross negligence (dolo o culpa grave in Spanish law), or any right you have as a consumer under mandatory law in your country of residence. Nor does it affect your right to rely on what we publish about Galvanic Voice itself.

Not a substitute for seamanship. No app, ours included, replaces sound judgement, proper equipment or a human watch.

Trade marks. All product, feature and company names are the trade marks of their respective owners. Their use here is for identification and comparison only and does not imply any affiliation with, sponsorship by, or endorsement from those owners.

The Sailing App Group Review

What we found

One app for the whole boat

One boat, one set of data

How the review works

The sixteen categories

Weather

Weather routing

Charts & navigation

AIS & traffic

Instrument displays

Remote monitoring

Anchor watch

Crew overboard / MOB alerts

Voice & audio alerts

Log books

Crew watches

Boat maintenance

Sailing performance

Crew fatigue & sleep

Crew aboard & ashore

Engine & fuel

What it costs to run for 24 months

Apps that run on a phone, tablet or computer you already own

Systems with hardware aboard

The appendix: all the data behind this review

About this review, and how to correct it

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What we found

One app for the whole boat

One boat, one set of data

How the review works

The sixteen categories

Weather

Weather routing

Charts & navigation

AIS & traffic

Instrument displays

Remote monitoring

Anchor watch

Crew overboard / MOB alerts

Voice & audio alerts

Log books

Crew watches

Boat maintenance

Sailing performance

Crew fatigue & sleep

Crew aboard & ashore

Engine & fuel

What it costs to run for 24 months

Apps that run on a phone, tablet or computer you already own

Systems with hardware aboard

The appendix: all the data behind this review

About this review, and how to correct it

Stay Informed

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