Sudakutah

Download topo maps for the US and some other countries in advance, so you wont 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:

- This can be purchased and used with or in instead of the free sources.

- Boundary maps for 12 western states from the Bureau of Land Management(BLM) for $7.99. Overlay for topo maps hunters.

-Content from US TrailMaps

-Snowmobile Trail Maps for Snowmobiling enthusiasts,

-ATV Trail Maps

-Whitewater Trail Maps,

-Equestrian Trail maps.

See these in the menu under More-> "Purchasing AddOns". They can be shown on top of topo maps.

You may try the DEMO version to make sure you like the maps in your country.

Use offline topo maps and GPS on hiking trails without cell service! The GPS in your Android phone can get its position from GPS satellites, and you don’t have to rely on your data plan to get maps. Have more fun and safe GPS adventures in the backcountry.

Add custom GPS waypoints in longitude and latitude, UTM or MGRS grid reference. Import GPS waypoints from GPX files. Choose mapsource-like icons for GPS waypoints. (This app uses the WGS84 datum, NAD27 is available in settings). 

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BackCountry Navigator PRO GPS Apk