Install app from .ipa package is now just one click from the toolbar on ifunbox.
iFunbox will transfer the selected ipa packages to iDevices and involve the official app installation service on iOS to complete the installation. Unlike .deb and .pxl packages, .ipa package is installed with low privilege, which prevents the installed app from destroying core iOS components due to bugs or malicious codes.
To install .ipa purchased with your own Apple ID for that device, the installation works even without Jailbreak. To install unsigned .ipa package, you may need to install AppSync from Cydia. Otherwise, the installation will fail.
Steps to install AppSync
1) Open Cydia app, and tip [Manage] tab.
2) tip [Sources] button.
3) tip [Edit]
4) tip [add]
5) Input http://cydia.hackulo.us, and tip [Add Source]. Wait a while for the data synchronization.
6) tip [Search] tab and search for Appsync.
7) install the AppSync corresponding to your iOS version. Wait a while for the installation and reboot, then you done.