About six months ago, Apple introduced a ' Developer APIs through which you could easily determine whether the application was created by him was turning on an unlocked phone (jailbreak) or not. How was the developer can then choose whether the application should run or not on this type of devices, perhaps to avoid it to be used without having actually purchased. But this was a move that should not be underestimated because it is true that too many people to do the jailbreak your Apple device , it is also true that most of these users regularly purchase applications and unlocks only for tweaks available on Cydia.
