The app mute all music audio streams automatically, when enters "Silent mode".
The app mute all music audio automatically, when enters "Silent mode" or "Vibration mode" and the "Priority mode".
And restore the volume when leaving the Silent mode or Vibration mode.
Also music, games and video apps will be muted.
"Mute All" detects automatically when you enter to the silent or priority and vibration mode.
Mute all automatically mute all phone sounds like musik, video, games etc. if you enter the silent, priority or vibration mode. When you leave the silent, priority or vibration mode the app restores your old volume.
Works until Android Lollipop.
For all Android version until Version 22.