Contacts Hacker

This is an app built to mess with the contacts of the phone it's installed on. Use it to prank your friends when they leave their phone unattended by changing all of their contacts to a certain name or simply switching their names around! Don't worry, the app can undo any changes that it has made, even after being uninstalled and then reinstalled! Make everyone show up as Nicolas Cage, Batman, Steve, or one of Avengers; the possibilities are endless!

NOTE: This app has issues with raw Facebook contacts, because they're protected and therefore unchangeable. Disable Facebook account sync prior to using this app for maximum effectiveness.