SailGrib WR is a full-fledged navigation app that runs on Android phones or tablets. It is designed for recreational cruisers or demanding racers. It costs a tiny fraction of PC based navigation software but it can do most of the basic stuff they do and sometimes more.
SailGrib WR includes the following modules:
-Grib downloader and viewer with access to all the best models (GFS, NAM, WW3…). Iridium Go compatible and approved by Iridium.
-NOAA Weather Fax integration -Tide calculation for the main harbors of the planet
-Advanced weather routing module with a large polar diagrams library. -Free NOAA raster marine charts automatically downloaded -Real time NMEA data interface through WiFi: boat’s data and AIS
-Race tracking A huge benefit is to run all of this on a low-power tablet or phone which you always have with you. On top of that, for better redundancy, you can run it on multiple devices that you own with only one license. This app cost only $45 with no subscription: a huge bargain! Go!