The main problem with the app is that all the data requires that you have an Internet or cellular connection. Coastal cruisers will find this app very useful but long distance cruisers will need a weather app that can download and use GRIB files. Weather 4D Pro would be a great choice for offshore use.
The app is great at weather but is very weak on marine navigation. So, you are still going to need to purchase a separate navigation app. I am not sure it is worth the $6.99 for just a few added NOAA charts. I think I will save my $7 and just use the free Intellicast HD weather app.