If you rely on iOS 9.3.5, download and archive every IPA you find now.
: A popular alternative app store for iOS that allows you to install a variety of apps not available on the official App Store.
: A semi-tethered jailbreak tool that allows you to jailbreak your iOS device and then install jailbreak apps.
: A must-have for older iPads. It handles almost any video format and is highly optimized for older hardware, making it perfect for watching downloaded movies offline.
: One of the few messaging platforms that maintains a functional (though sometimes laggy) legacy client for older iOS versions. Polaris Office
The absolute goat of legacy iOS. It plays almost any video format without needing transcoding, turning an old iPad Mini 1 into the perfect offline movie player.