If you want to set a cool background for your phone, 4k Psychedelic wallpaper is a good choice. This app contains 5000+ high-quality psychedelic wallpapers, which are available in various resolutions. They are suitable for smartphones with a resolution of 4096×2160 and higher. Moreover, these wallpapers are optimized for fast loading times, which means they can be used on phones with a slower internet connection. The app also supports power zooming, rotation, and double tapping. And it also supports sharing of your favorite psychedelic wallpapers.