Marinate
Nautical charts
OpenStreetMap + OpenSeaMap charts with buoys, lights, depths, and marinas — plus satellite, light, and minimal bases, depth shading, and offline downloads per area.
Explore charts →Marine navigation, done right
The chartplotter in your pocket
Marinate turns your phone into a full nautical chartplotter — live GPS on OpenSeaMap nautical charts, route planning, weather, tides, and AIS traffic. It works offline, with no account and no tracking.
On the App Store & Google Play · No account, no tracking · All your data stays on your device
Charts
Offline — on your phone
Account
None — no sign-up, no tracking
Core app
Free forever
Safety tools
Free — MOB & anchor alarm
Everything on deck
One app for the whole passage
From the first waypoint to the trip logbook, Marinate covers navigation, planning, weather, and safety in a single chart-first app.
Routes & trip log
Plan multi-leg routes, navigate with live distance, bearing, ETA, and cross-track error, then record tracks and review every trip in the logbook.
Plan a route →Weather & tides
Tap anywhere on the chart for wind, gusts, waves, and temperature, watch the animated wind-field forecast, and check tides and currents before you go.
Check the forecast →Safety at sea
One-tap man-overboard with auto-return navigation and an anchor drag alarm on every boat — plus AIS collision warnings when you go Premium.
See safety tools →Boat instruments
Big-number SOG, COG, heading, and position readouts, AIS vessel traffic, and live depth, wind, and speed from your boat via SignalK / NMEA.
Connect your boat →Yours, everywhere
Built for iPhone and Android — with offline chart downloads, GPX import and export, and easy spot sharing.
Get the app →On the water
Built for the helm, day and night
Clear at anchor, underway, and after sunset — with a red night palette that protects your night vision.
Screenshots from real passages — the app itself runs in English, French, Spanish, and Hebrew.
Our pledge
The safety essentials are free, forever
Some things should not sit behind a subscription. One-tap MOB and the anchor alarm are free for everyone, forever — no trial, no tier, no exceptions.
- One-tap MOB — drops a man-overboard mark and starts auto-return navigation instantly.
- Anchor alarm — set a watch circle and get woken the moment your anchor drags.
- Collision alarm — AIS CPA/TCPA warnings when another vessel gets too close, part of the Premium AIS overlay.
Simple pricing
Free to navigate. Premium to go deeper.
Core navigation, MOB, and the anchor alarm are free forever. Premium adds advanced layers — with a 14-day free trial.
Free
$0 forever
- Full nautical charts & GPS navigation
- Routes, tracks & trip logbook
- Weather, tides & currents
- One-tap MOB & anchor alarm
Premium yearly
Best value$14.99/year
- Depth shading & contours
- Animated wind & pressure isobars
- AIS overlay, collision alarm & SignalK
- Track replay & unlimited offline areas
Premium lifetime
$39.99 once
- Everything in Premium
- Pay once, keep it forever
- No subscription to manage
Prefer monthly? Premium is also available at $1.99/mo — compare all plans.
Cast off
Be first aboard on launch day
Install Marinate from the App Store or Google Play, download your cruising area, and head out. No account, no tracking — just you, your boat, and the chart.