This is a free wallpaper app with HD backgrounds, clock, magic touch, emoji, 3D wallpaper, animated multicolored particles, and more!

With this app, you can create your own custom themes, including background changer, wallpapers, frames, emojis, colors, magic touch (color particle and sound), etc. Customizing your theme can give your screen a unique look.

This app is easy to use: 

Customize wallpaper HD: add a clock, your name, emoji animation, magic touch (color particle and sound), particles, etc. 

The 4K Live wallpapers for OPPO app free has some of the best wallpapers for your Android phone and frequent cool new background themes!

This is a great app for Android phones and tablets.