Knock Lock Screen - Applock is a free Android utility and tool application developed by Knock Lock. It is an innovative lock screen that provides an invisible path to unlock your device. With its superbly rich graphics, it offers three types of locks: Knock Lock, Pattern Lock, and Time Password Lock.

One of the main features of Knock Lock Screen - Applock is preventing unauthorized access, which helps to prevent others from using your device. It also has an invisible path to unlock pattern that changes every minute, thus making it impossible for intruders to guess how to open your lock screen. Additionally, it prevents accidental calling, and the choice to set knock position on the screen.

Knock Lock Screen - Applock uses the Device Administrator permission to enable the double tap to lock feature. Users can activate Knock Lock as "device administrator" to lock the device on double tap on the floating icon. However, users can rest assured that this app will never use these permissions to access their private data.

In conclusion, Knock Lock Screen - Applock is a highly secure lock screen that consumes less memory and battery. It supports both 12-hour and 24-hour formats and enables users to enable/disable unlock vibration and sound. It is a simple and clean app that provides 100% safety and security to your device.