I've quickly noticed with the "Navigation app" that comes with the Vizio if I don't set up where I want to go before I leave my home WIFI signal I can not change my destination while on the road, maps aren't loaded or I can't get a new route. Seems the "Navigation app" needs a WIFI signal to download the appropriate maps, find the route, etc. So, are there apps anyone can recommend that allow me to use the Vizio tablet as a stand-alone GPS with a navigation database? My wife doesn't like the fact that she can't go back home if she doesn't have a WIFI signal! Thank you!