• All apps from iTunes will have fair play DRM
• The following will return 0 if the binary is decrypted

otool -l app | grep LC_Encryption_INFP -A 4

https://github.com/stefanesser/dumpdecrypted

DYLD_INSERT_LIBRARIES=dumpdecrypted.dylib /var/mobile/Containers/Bundle/Application/{GUID}/yourApp.app/yourApp

https://github.com/KJCracks/Clutch/releases http://cydia.iphonecake.com

clutch -I 
clutch -d <app-id>

https://github.com/BishopFox/bfinject#decrypt-app-store-apps

bfinject -P {APP} -L decrypt