Let fly deluxe for the iPhone. $2.99. Has a large library of factory loads (1500+) simple to use. Easy to build custom loads. Used it to get my 200 yard dope for Winchester .22LR subsonic and hit a balloon 3rd shot (58" drop from 50 yd sight in). Uses local weather condition info. Factors incline using camera, but I have not messed with that part of it.
A lot of people on the hide mention shooter, I can only assume that he would have an account there. I did find an app called Strelok. I checked it against JBM and its actually pretty close to just about everything I plug in. Its also very simple to use and its free. Illl have to test it over the next couple weeks.