Interesting, seems to me like this app is a little overpriced all things considered, since "ballistics" is available at under 5$ as well as iSnipe. Best thing about Ballistics (have first hand experience with it) is that you pick your bullet (and i mean bullet, not cartridge) from a huge list from most major manufacturers as well as standard "army" rounds, and it will have the corresponding ballistic coefficient for that particular round (as well as variable BC for many, because BC changes at different velocities). This is in addition to the "mildot master" type calculations available, data recording for ranges, and other little toys. I havent tried out iSnipe yet, simply because they do not allow for environmental variables to be entered and become part of the equation. Now I do not have first hand experience with KAC's offering, so I will stay in my lane, but I think that the average shooter would be better served with Ballistics. If someone is willing to shell out the 10$ or so for KAC's branded offering, please do provide a review.