Mobile development refers to the creation of apps for use on devices such as tablets, smartphones, automobiles and watches. Mobile development often incorporates features of mobile devices that may not be available on desktop devices. An example of this is the ability to operate a device or play a game simply by moving the smartphone around in space. Another popular example is the augmented reality game Pokémon Go. Mobile apps are designed and built for different operating systems. The Android operating system is the most popular followed by Apple’s iOS.