An application, or app, is a type of software that can be installed on a mobile device, such as a smartphone or a tablet computer. Apps are usually downloaded from an app store, such as Apple’s App Store or Google Play.

There are all sorts of different apps for all sorts of different purposes. Some apps are for entertainment, such as games or music players. Others are for productivity, such as word processors or task managers. There are also a variety of apps that are designed to help you stay healthy, such as fitness trackers or calorie counters.

Apps can …