I have $0.99 iOS app and I'm afraid someone would like to crack it. How can I protect my app from crackers?
It's very easy with little class, which I implemented: https://github.com/itruf/crackify
Just import Crackify.h and check:
BOOL cracked = [Crackify isCracked];
these are some check list to check whether your app is cracked.
- checking plist size
- checking signer identity
- checking if binary is crypted
- checking modified date of info.plist against modified date of package
If it's in the store it likely already has been cracked. I wouldn't waste your time trying to combat pirates, no-one has been able to so far. I suggest instead you focus upon building apps that people are willing to pay for, or free apps that are iAd supported.
来源：https://stackoverflow.com/questions/13642153/how-do-i-protect-my-ios-app-from-being-cracked