This is the most comprehensive and user-friendly GPS app for Android with over 985 million acres of public land and over 550,000 miles of roads and trails.

This app is the best tool for all adventurers who want to explore the world. 

The onX Offroad 4X4 ATV Trail Maps displays the area and distance to your destination, with a route preview, on your device. Upon arrival, a notification sound and text are displayed. You can also view photo waypoints so you can make sure you're going the right way and passing by the right landmarks.