A free app for Android, by KazutoStudio.

XXXTENTACION Wallpaper Rapper HD is an application that will help you to create custom wallpapers for your mobile screen. The best thing is that you can choose any image to make your device cool. You can choose from the provided categories or you can search for your own. It’s also easy to use and very intuitive.

How to install and use it:

Open the app, and tap on the “Plus” button. You will be given the option to select your favorite wallpapers. Then you can press “Set as Wallpaper” to apply.