The easiest and most powerful weather routing and navigation app

on a tablet

One single application to cover:

weather routing


  • Calculate the best route integrating winds and currents
  • Easy routing for new weather routing users
  • Compare the best route with the shortest route and select most appropriate one
  • Forget awkward waypoints positioning. Avalon automatically places them for you
  • Know detailed passage conditions before leaving harbor
  • Get you customized VPP (boat speed characteristics) inclusive of each sail set
  • .... or just pick one of the 450 pre registered boats
  • Forget old-fashioned weather grib files. Avalon downloads automatically highly compressed weather data
  • Compatible with any satellite phone system (Iridium, Iridium Go, Inmarsat, etc)
navigation en



  • Monitor precisely your navigation on a nautical map
  • Receive a sound and visual warning in case of collision risk (AIS)
  • Monitor your main navigation data (NMEA) on your device
nautical maps



  • Load your own nautical maps into Avalon
  • Install public (free) maps: USA, New Zealand, Brazil, Argentina
  • Benefit from highly discounted prices on our packs of maps derived from ®UKHO or ®SHOM
  • Or simply use your Navionics maps



  • Display key weather data synchronized with your planned route: wind, gust, rain, risk of thunderstorm, cloud coverage, temperature, isobaric
  • Forget old-fashioned and space consuming grib files
  • Get warned in case of thunderstorm risk
anchoring alarm



  • Receive a sound warning when the anchor is sliding (distance and/or depth), with remote alarm via email



  • Cross the start line at the second
  • Optimize the tacks with the real time display of the lay lines
  • Integrate impact of sea status (with crossed sea detection) in your optimized route