A full version app for Android, by AppLockScreen.

Skull Pattern Lock Screen is a free-to-download, user-friendly, simple-to-use application that lets you customize the lock screen of your Android device by setting a unique skull pattern. Once you download this app, you will be able to set a custom skull pattern and customize the background of your lock screen. This app is easy to use and will work on all devices that run Android. 

How to use Skull Pattern Lock Screen:

Once you have downloaded this application, you can set up your lock screen in a few easy steps. First, you need to enable the application in the settings of your device. This can be done by tapping on the “Enable” option in the settings of the application. Next, you need to set the pattern. For this, you need to tap on the “Set” option in the settings of the application. After that, you need to tap on the “Confirm” option to confirm the settings.