Answer
The app will remain on your mobile until you manually delete it. The COVID Certificate app and the certificates it contains are stored locally on your mobile. It will therefore still be possible to display existing certificates in a reduced form even after the certificate system has shut down. For more information on displaying certificates in the app, please see the FAQ "What's going to happen to the COVID Certificate app?". All other functions in the app are no longer available. The federal government has no access to the app or the certificates it contains.