iOS is a mobile operating system developed by Apple Inc. and distributed exclusively for Apple hardware. It is the operating system that powers many of the company's iDevices. Originally unveiled in 2007 for the iPhone, it has been extended to support other Apple devices such as the iPod Touch, iPad, iPad Mini and second-generation Apple TV onward. As of June 2014, Apple's App Store contained more than 1.2 million iOS applications, 500,000 of which were optimized for iPad. These apps have collectively been downloaded more than 60 billion times. It had a 21% share of the smartphone mobile operating system units shipped in the fourth quarter of 2012, behind Google's Android. By the middle of 2012, there were 410 million devices activated. According to the special media event held by Apple on September 12, 2012, 400 million devices had been sold by June 2012. The user interface of iOS is based on the concept of direct manipulation, using multi-touch gestures. Interface control elements consist of sliders, switches, and buttons.
iOS Popularity Over Time