Do the older versions of the TestFlight app still work? The App Store allows you to download the latest version of any app that's compatible with your device; I assume the TestFlight app is no different in this regard.<p>That is, while the TestFlight app now requires iOS 13, I assume that iOS 12 users are still able to access betas of apps that themselves still run on iOS 12, via an older version of the TestFlight app.