As far as I can find out from the ‘net there seems to be very little in the way of native map navigation apps for Android, which seems a bit off, somehow. There’s mapdroid and oruxmaps, but I don’t know much about them. I guess it’s still early days for Android devs to get the level of native mapping apps up near where it is on the iPhone. It took a while for the apps to get onto the App Store, so I’d expect a bit of a lag on Android. Sorry, I’m an iPhone user, so know little about Android, just trying to help out. I know how frustrating it is having the capability to use offline maps and no maps to use with it. It was quite some time before I had the sort of mapping I really wanted on my phone, possibly nearly a year or more, in fact it’s probably this year that native onboard mapping on the iPhone has really started to work properly with Viewranger, UK Map, CoPilot, TomTom, Memory Map, and Anquet on the way.