A collection of graphic assets designed to replace the default visuals representing applications on devices utilizing a specific operating system version. These typically include a set of images, configuration files, and sometimes a launcher or application designed to implement the visual changes. An example involves replacing the standard icons on a smartphone running version 7.0 of a mobile operating system with those from a particular designer or theme.
Customization of user interfaces improves aesthetic appeal and personalization of digital devices. It allows users to modify the look and feel of their devices to match their individual preferences, increasing user satisfaction and engagement. In the mid-2010s, visual modifications became increasingly popular as a way to differentiate devices and give users more control over their digital experience.