If you would like to control Teufel Streaming via the Teufel Raumfeld app on an Android cell phone, but have not set up a Google Account to obtain the app free of charge from the Play Store, you can obtain the APK (Android program package) for installing the Teufel Raumfeld app from Support on request.
Please note, however, that an app installed in this way is excluded from future updates. Furthermore, the full use of all features cannot be granted.
By the way, setting up a Google Account is free of charge.