Noise volume (seniorlab.de.volume) on Google Play
„Switch off your mobilphone“. A simple App for this action. Ringer volume, Media volume, Alarm volume, Notification will be zero and no vibrate with one click. All levels are stored. If you switch back, all volume levels are restored. The app requires only 93 MB memory.https://sites.google.com/site/laermmachtunskrank/volume