Use one of these, depending on whether the device is jailbroken.

by dragging icons onto each other and a multitasking bar (accessed via double-click) for switching between recent apps. Safari Enhancements : Features more reliable syncing for Safari bookmarks Reading List Apple Support How to Get Apps (IPA Management)

Copy these files before they disappear.

Official sources like the App Store no longer serve iOS 5.1.1-compatible apps. If you open the App Store on an iPhone 4S running iOS 5.1.1, you’ll see an error: “This app requires iOS 10.0 or later.”

If iTunes says “The app ___ was not installed because it requires a newer version of iOS” – the IPA is too new.

: With Cydia installed, you can now search for and install IPA files directly. There are also third-party websites and repositories where you can download IPA files, but be cautious and ensure you're downloading from reputable sources to avoid malware.