I upgraded to the BulletDrop+ after using the standard version so I could save my loads and choose the ballistic model and other options. Ive found the app to be really helpful for making shots out to 1000 yd. I have not experienced the crashes or loss of data problems reported by other users (knock on wood!). I gave it 4 stars since its easy to use and seems pretty accurate for my purposes, but lacks som e of the capability of higher priced apps like accounting for corriolis, spin drift, etc, but it doesnt cost as much either.
!McCormick about BulletDrop+, v3.6.1