Not sure the right term but was wondering if there is a program that can completely wipe an app or if that even needs to be done. The reason I ask is because I have 4 iPhones and this one program I have on all 4 works except on 1. The only one it does not work on is the one that had the free version on it before hand. I am wondering if having both on the same time could of messed it up. I have uninstalled and reinstalled it 4 or 5 times and still no luck. Just wondering if there is a way to make sure it is truly gone before installing it again.