If you have access to a computer, using a version of iTunes older than 12.7 is the most stable "official" way to move files. Connect your device via USB.
iOS 7.1.2 is an older version of the iOS operating system, and it's no longer supported by Apple. However, users may still want to access IPA files for various reasons, such as: ipa files for ios 7.1.2
To run these files on a device running 7.1.2, you generally need two things: If you have access to a computer, using