A free app for Android, by Cypher Cove.

Live Wallpaper Screen Saver is a free app for Android phones and tablets that gives you the best and most unique live wallpapers for your device in high quality. It has a complete collection of free live wallpapers and backgrounds, with a large selection of beautiful images, such as a captivating image of a DNA helix, to choose from. With this screen saver, your device will not be locked.

Moreover, you can easily apply it on your phone. Once you have downloaded this wallpaper pack on your Android phone, just go to your phone’s settings. Next, select the screen saver of your choice, then enable it.