BackCountry Navigator PRO GPS v4.6.9 APK
Google play Store
Go To Adf.ly
Download topo maps for the US and some other countries in advance, so you won't need cell coverage when navigating.
This uses many publicly available map sources as free downloads. It also has some additional content available as an in app purchase:
Boundary maps for 12 western states from the Bureau of Land Management(BLM) for $7.99. Great for hunters, hikers, and prospectors.
Content from US TrailMaps for $15.99, including:
Snowmobile Trail Maps for Snowmobiling enthusiasts,
ATV Trail Maps
Whitewater Trail Maps,
Equestrian Trail maps.
What's in this version : (Updated : Sep 6, 2012)
More Kml and GPX Export fixes.
OSRef conversion fix.
Updates: USGS Aerials now uses National Map
Faster downloading! Up to ten times as fast.
More reliable selection for downloads.
New Map Source: 4umap: Free Topographic map of Europe
New Map Source: Catalunya
Addons include Accuterra map source,SnowMobile trail maps, ATV, Equestrian, Birding, and Whitewater trail maps, and BLM Land Boundary Maps of 12 western states.
Required Android O/S : 1.6+
Screenshots :