If you own an iOS 7.1.2 device, consider making a full backup of your /var/mobile/Applications/ folder. Each folder contains an app’s IPA-equivalent data. Zip it and store it on a hard drive. You may be the only person in the world still holding a rare 32-bit version of an app that vanished from the App Store in 2015.
: Once AppSync is installed, you can use Filza to tap on an .ipa file and select "Install" directly on the device. ipa files for ios 712