Phone Mute

Prevents your mobile easily sound amiss in the silence of your office or in the middle of a meeting.
Program hours to which you want your phone into silent mode or vibrate constantly and forget about configuring it.
Set the start time and the end of the event as many times as you need and Silencer it sets up how you've been programmed to do not mind the sound of your phone between the hours indicated.
Only the necessary permissions.
No need for the app to read your phone contacts or know what your number.