Avalon Offshore is a weather routing and navigation app for sailboat cruisers and offshore racers.
Avalon integrates all the functionalities that a skipper may require in one single app.
- Weather routing with multi sails handling and mixed sailing motoring route calculations.
- customized VPPs, selection amongst 450+ preloaded boats or private polars
- Navigation (with AIS and NMEA support)
- Iridium support with highly compressed weather sources (up to 95% compression rate vs gribs)
- Free raster nautical maps: NOAA, Linz, Brasil, New Zealand
- In-app pack of maps derived from UKHO or SHOM covering France, UK Belgium, Portugal, Spain Carribean, Eastern and Western Mediterranean, Transatlantic, ...
- Personal maps support: mbtiles, tif, kap, geotiff
- Navionics maps: You can use your Navionics Boating maps with Avalon free of charge.
- General weather: Temperature, rain, cloud coverage, thunderstorm, pressure, ...
- Anchoring alarm
- Regatta module: Start management, lay lines, etc
- Capability to load external current grib from Tidetech®

Warning: Continued use of GPS running in the background can dramatically decrease battery life.

Includes one month free use of Premium options (see below)

- Iridium data compression (reduce by 6 transmitted volumes)
- additional weather sources: Arome, Arpege, NAM, CEP, Skiron ....
- Weather data up to 394 hours including Wind, Gust, Waves, Precipitation, Storms, Cloud Coverage, Pressure, Temperature
- Integration of currents in route calculation in covered areas (worldwide, Iberia Biscay and Ireland and Mediterranean sea)
- Waves (Swell and wind waves)

Yearly subscription
Payment will be charged to iTunes Account at confirmation of purchase
Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period
Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal
Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase
No cancellation of the current subscription is allowed during active subscription period

Privacy Policy and Terms of Use at:

What’s New

Version 4.5.0

Management of boat draft

App Privacy

The developer, JEAN-FRANCOIS COULON, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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