>>>>>> This app is free. It supports icon or notification ads. ————————————————Doors are used to open and close an entrance. The safety door here in used to keep your mobile phone information inside. Settings of this safety door:1. Turn on the function of screen lock.2. Sound and vibrate effects make this app lively.3. Open the door when you want to unlock screen. Is it an easy application? Sound and vibrate effects can be turned off if you don¡¯t like them. Almost all the doors are equipped with locking mechanisms to allow entrance to certain people and keep out others. This safety door here has a locking mechanism, too. You can enter into your mobile phone by pulling down the lock. The phone power and the current time will display on the door, you needn¡¯t open this safety door if you want to check these things. Please supply us with 5 stars if you like this safety door. Thanks for your help.