Music Lock is a free app for Android devices that will help you protect your mobile phone with a musical password. This application can be used on any Android device and will work with all the Android OS versions.

How to use this application?

First, you need to install the application and open the settings. You can find the settings in the app itself. The first thing you need to do is to choose the key for the lock screen. This can be done by tapping the "Start" button. Next, you need to set up your password and enable the lock screen.