The only app I use while I'm out is onX hunt. And I only use it when I'm out scouting to mark property lines rubs scrapes and where I hang my stands I even have the app on my girlfriends phone so if anything happens to me she'll know right where I am. I also find it handy for when your bow hunting and shoot a deer and need to give it time before you start tracking you can mark where you shot it at where you found the arrow and all the blood you find while tracking it so if you have to stop and return in the morning I find it handy and besides that I don't really use my phone while I'm out