You can lock phone screen for a certain period of time.
Phone Addiction Blocker is the perfect app to people who suffer the symptoms of smartphone addiction.
You can lock Smartphone for a certain period of time.
Lock the screen of the smartphone, to ensure your valuable time.
Start timer,the smart phone display is covered with a screen while countdown finish.
Up to any set time has counted down to "00:00", the smartphone operation is impossible.
Please make sure to remember that the application are locked,they cannot be unlocked even when the power is turned off.