I reference a few apps while in the tree: tap-a-talk (lets me post on here), outdoor life weather app, field and stream rut reporters, and eweather HD (has a great barometer trend)
My hunting related apps are: Scoremyrack - basically put in the measurements and it gives you the score. Time2Hunt - Moon, weather, etc. Telling you the best times of that day to hunt Trackbackhunting- GPS that lets you marks stands, vehicle, sign, animal down, etc. tapatalk - BHC Then I have a lot of games or read books on my phone but the battery usually doesn't last long if i'm playing games
You should also check out the new Quiver Hunting App. It gives you current weather, sunrise & sunset, wind speed and direction along with barometric pressure. You can also track individual hunts and log deer activity. Pretty slick and it's free too! https://itunes.apple.com/app/id982722720