After jailbreaking, install this tweak from Cydia. It allows the installation of any IPA file (even unsigned ones) via Safari or local file managers without revocation.
This is the gold standard for older devices. It specifically hosts apps and games that were designed for iOS 3 through iOS 9. ipa library ios 935 portable
Here is a curated list of apps that still function beautifully on 9.3.5 and are nearly impossible to find on the modern App Store. After jailbreaking, install this tweak from Cydia
platform :ios, '9.3.5' use_frameworks!
files that still worked on version 9.3.5. These "Librarians" collected specific builds—the last versions of Spotify, Facebook, or classic games like Angry Birds —before they vanished from Apple's servers. The "Portable" Solution: ipa library ios 935 portable