Go to your device’s Widget menu, and drag the MuteIt icon to one of your home screens. With one click you can mute your device.
FAQ | MuteIt!
In the app menu you can select a daily time to mute or unmute your device. This is particularly useful if you do not want to be disturbed whilst you are sleeping, or at work, etc. This function can be overridden at any time with one click on the MuteIt Widget.