Excellent app for sailors and for pilots!!!

Weathertrack is the only
weather app I know that really does do offline maps (without requiring
to download the area you want to see). Very detailed and accurate. High
quality and very well presented grib files. Love especially the route
feature when racing which really helped me to decide which was the best
way to go. You have all the weather data for your route including
current and tide and get a pretty clear idea what to expect on your way.
App highly recommended, worth every single cent!!!

Hekltfassinov about WeatherTrack GRIB