If there is no jailbreak, your software is downloaded from the APP store and synchronized to the iphone with itunes, then the landlord will see if he downloaded the iphone software. You may have downloaded touch or ipad. The landlord can also see if the game is suitable for his own ios system. The running platform of your game may be higher or lower than you.

If the jailbreak file is in ipa format under 9 1, it may not be opened. There are two reasons. One is that you didn't install an ipa patch with Syn letters, so just install it. The installation method is also very simple. When you use 9 1 to install files, 9 1 will ask if you want to install patches, and the other is 965438. You can try.