ExtractApp IPA – Easy App Extraction for iOS ExtractApp, developed by DevelopCubeLab, is a powerful TrollStore-compatible tool that allows you to extract apps from your iPhone or iPad as IPA or TIPA files. Unlike other tools like DowngradeApp, ExtractApp does not decrypt the files, keeping them encrypted while making extraction simple. After installing, you can browse both your installed and system apps. The tool copies app files into a Payload folder, compresses them, and saves them as .ipa or .tipa files. You can also use a file manager like Filza to do this manually.