An app, short for application, is a self-contained computer programme that fulfils a particular function.
The term is most commonly used to refer to apps on a mobile device.
Applications are used to carry out a range of functions. The most popular applications are often communication apps such as WhatsApp or games such as Candy Crush Saga.
There are also app versions of common services such as those providing weather or transport information.
In addition, companies such as banks may provide apps for their customers to use to interact with them as a more convenient alternative to using the website.
Some companies will also provide apps for their employees to use.
Apps based on mobile devices provide several functionalities that are not available on desktops, such as use of the smartphone’s touch screen, microphone, camera or location services.