This Android app tests the signature spoofing capability of your OS as required by the microG Project. The app attempts to fake its own signature and reports whether it succeeds. Simply launch the app to see the result of the test. You can find more information about signature spoofing here.
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.