page_title: List of iOS devices
section_title: Comparison of models
hierarchical_section_title: List of iOS devices / Comparison of models
caption_attribution_description: English: Left to right: iPhone 4, iPhone 3G, iPhone.
context_page_description: This is a list and comparison of devices designed and marketed by Apple Inc. that run a Unix-like operating system named iOS and iPadOS. The devices include the iPhone, the iPod Touch which, in design, is similar to the iPhone, but has no cellular radio or other cell phone hardware, and the iPad. All three devices function as digital audio and portable media players and Internet clients. The Apple TV, which runs tvOS, is a set-top box for streaming media from local sources and from certain internet services to a connected television set, and has no screen of its own. About 1.35 billion iOS devices have been sold worldwide as of March 2015. As of September 2018, about 2 billion iOS devices have been sold worldwide.
  The operating system on iOS devices can be updated through iTunes or Finder, or on iOS 5 or later, using over-the-air updates. A major version of iOS tends to be released every time a new type of iPhone is launched, with minor changes throughout the year as needed. All updates are free to iOS devices. Apple upgrades its products' hardware periodically.
caption: Side view of an original iPhone (right), iPhone 3G/3GS (center), and an iPhone 4 (left). The original is made of aluminum and plastic, the 3G/3GS is made from a hard plastic material, and the iPhone 4 is made of stainless steel and hardened glass.
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