GPSApp will show you a "map" of a route you load from the maps on us website and it will show a track of where you've been. So you really aren't downloading a map persay, but a track of where you are supposed to go to get from one place to another. There is no way to download general road information, unless you fiqure out a way to make Maps on Us generate a route that hits every road in your city (impossible unless you live in a very small town).