i Was looking for a new chart plotter for my boat and was amazed at the insane price for a 7” screen. So I decided to research tablets with the Navionics up. I got an 8” screen Android for $199(Canadian) downloaded the App, paid my $29.99 for the map download and I now have a bigger screen and regularly updated Navionics. It works as well as if not better than a proprietary Chartplotter. Not bad for under $230!!