A free app for Android, by Pawel Grabowski.

Koi Video Live Wallpaper 4K is an application for Android devices that allows you to use your mobile screen as a beautiful water pond full of beautiful fish. This application has the capability to create the live wallpaper and display it at high quality.

It allows you to choose the colors of the fish and the background of the water pond. It has an option to set the density of the fish in the pond. You can also use it for other purposes. It can be used as a background for your home screen or lock screen. It is also capable of being used as a wall paper or a screen saver.

Koi Video Live Wallpaper 4K is an application that is very easy to use.