I have backcountry navigator. I don't have experience with any other "backcountry" GPS apps. I tried myTracks and it was just a battery hog. BCNav allows me to download map sections to access offline, and I can use it with the GPS antenna off even setting waypoints without the antenna on, as long as I know my location. I can turn on the GPS antenna for the brief moment if I wanted to verify location. I do not use the GPS to track my route, only for specific location ID, extra map, and a means to store locations of things I find.