Anchor alarm
It watches your swing all night, with a radius, a two-ring pro mode, or a zone you draw. Go ashore and keep watching: your other phone gets the alarm and shows the boat’s anchor map live.
Free on iOS and Android
For a safer boat, captain and crew.
Anchor alarm, weather, route planning, crew check-ins, offline charts, and BoatGPT for anything about boats and the sea. Each one built to be trusted at three in the morning in a rising wind.
- No account needed to start
- Works offline
- No ads
- 12 languages
What is on board
Seven tools, one free app. The top row is the app itself, not a mockup.
Weather
Wind, gusts, waves and temperature by the hour, with ECMWF, GFS and ICON side by side. A live wind map shows where it blows, and bookmarks keep your bays one tap away.
I’m OK
A check-in timer for solo sailors and night watches. Tap before it runs out. Miss it and the phone beeps for a minute; stay silent and it alerts your emergency contacts.
Route planner
Set start and end, add stops, pick sail or motor and your speed. Ask the AI for help and it minds the forecast on each leg and points out sheltered bays. Save the routes you like.
BoatGPT
Ask anything about boats, gear and seamanship: a fault, a service interval, a part number, what a warning light means. Add a photo when it is easier to show than describe.
An answer drawn from a manual cites the page, so you can open it and check. General knowledge is marked as general, never mixed in.
- Manuals
- 850+
- Pages indexed
- 54,000
Trips
Start recording when you head out. It pauses itself at anchor, resumes when you move, and logs distance, time and speed. No signal? It saves on the phone and syncs later.
Pair devices
Leave one phone aboard and carry the other ashore. Anchor alarms and missed check-ins reach you there. Pair with an 8‑character code; each side chooses what it shares.
- Offline chartsDownload the seas you sail. Charts work without signal, load faster with it, and the app tells you when you sail off the downloaded area.
- Light, dark, or by sunsetAuto follows the real sunset where you are, so the screen never blinds you on a night watch. It can stay awake while you are anchored.
- 12 languages, your unitsThe whole app in twelve languages, distances in metres or feet, speeds in knots, and a standard or satellite map.
- Free, and yoursNo ads, no subscription. The anchor alarm and I’m OK work without an account, and you can delete yours, with its data, whenever you like.
Get it on your phone
Point your phone’s camera at the code to open this page there, then pick your store. Or searchSearch for SafeBoat on the App Store or Google Play. Needs iOS 15 or Android 6, or newer.