I backed up the Launcher app from my iPhone 6 using iTools. It backs up as an .IPA file. Is the .IPA file that it generates specific to the iPhone 6? Or could I restore that file to my iPhone 5, thereby getting Launcher onto that phone as well? When you download an app from the app store, does it download a specific version of the app based on which iPhone you download it with, or are they all the same app and the software just adjusts to your specific phone on the fly?