I use a hunting app all the time. I use the Trimble GPS HuntPro but I also can work a map, shoot an azimuth, explain contour lines, etc. I use an app because one it is way faster. Instead of focusing on the map I can focus on the hunt, two a lot of the hunting apps have weather, moon phases, sun rise and sunset etc. Three when I shoot an animal and find blood I can mark it on the app and see which direction the animal is going (general direction) if I happen to run out of blood. I still carry a map as a back up.