iOS is Apple's proprietary mobile operating system (OS) for its handheld devices, such as the iPhone, iPad and iPod Touch. The operating system is based on the Macintosh OS X. Designed for use with Apple’s multi-touch devices, iOS supports input through direct manipulation. The system responds to various user gestures, such as pinching, tapping and swiping.
iOS (originally iPhone OS) is a mobile operating system created and developed by Apple Inc. and distributed exclusively for Apple hardware. It is the operating system that presently powers many of the company's mobile devices, including the iPhone, iPad, and iPod touch. It is the second most popular mobile operating system in the world by sales, after Android. iPad tablets are also the second most popular, by sales, against Android since 2013, when Android tablet sales increased by 127%.
The iOS user interface is based on the concept of direct manipulation, using multi-touch gestures. Interface control elements consist of sliders, switches, and buttons. Interaction with the OS includes gestures such as swipe, tap, pinch, and reverse pinch, all of which have specific definitions within the context of the iOS operating system and its multi-touch interface. Internal accelerometers are used by some applications to respond to shaking the device (one common result is the undo command) or rotating it in three dimensions (one common result is switching between portrait and landscape mode).
Other iOS features include:
Integrated search support enables simultaneous search through files, media, applications and email.
Gesture recognition supports, for example, shaking the device to undo the most recent action.
Google Maps direction services.
Direct access to the Apple Store’s catalogue of applications, music, podcasts, television shows and movies.
Compatibility with Apple’s cloud service, iCloud.
On October 12, 2011, Apple released iOS 5, which expanded the number of available applications to over 500,000.