Wallpaper or background or desktop wallpaper or desktop background is a digital image used as a decorative background of a graphical user interface on the screen of a computer, mobile communications device or other electronic device. On a computer it is usually for the desktop, while on a mobile phone it is usually the background for the 'home' or 'idle' screen. Though most devices come with a default picture, users can usually change it to custom files of their choosing.
Live wallpaper is a type of application that works on a mobile device using the Android operating system. The application works as a wallpaper - providing the background image for the home screen - but also works as a conventional application since it can provide user - interaction with the touch screen and access other hardware and software features within the device.