Getting Emulators (PSP,DS and more) on your non-jailbroken iOS device - Play your favourite retro games on your iPad/iPhone with minimal effort! - Wololo.net
PPSSPP - download the PSP emulator for iOS 13
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How to Download PPSSPP on iOS 13 and Android Pie
PPSSPP Emulator iOS Download on iPhone/iPad - [Latest]
Play PSP or PPSSPP games on iPhone or iPad - No JailBreak