To install these files on iOS 9.3.5, you typically need to sideload them using a computer:
But finding a library is the hard part.
: Some archived IPAs are still encrypted and may ask for the original uploader's Apple ID. Look for "decrypted" or "cracked" labels in the libraries above. swaggyP36000/TrollStore-IPAs: A collection of ... - GitHub ipa+library+ios+935+free