Vibration Lock

Simply lock your phone on vibration mode (before important meetings) and avoid unpleasant mistakes of accidentally turning the ringer mode on.

* THERE WON'T BE A WAY TO EXIT VIBRATION MODE UNTIL UNLOCKING VIBRATION WITH THIS APP *

This way, you can give your phone to anyone without worrying the phone will exit vibration mode.

When the important situation is over, just unlock vibration mode.