Can I copy IPA files (downloaded on PC) to my iPhone running the latest version of iOS? Can I use iTunes?
you can transfer them through i tunes ,but they will never play if your iphone is not jailbroken
If you bought it, it can be installed via iTunes. For all other scenarios, Cydia along with whatever syncing utility you use would be the best solution.
No You Can't IPA's Are For Jail-broken iPhones With Installous Only!!!!!!!!
have you tried copytrans manager?