The word "iOS" in black San Francisco neo-grotesque sans-serif font.
Commercial logo as used by Apple, since 2017
iOS 17 home screen
DeveloperApple Inc.
Written inC, C++, Objective-C, Swift, assembly language
OS familyUnix-like, based on Darwin (BSD), macOS
Working stateCurrent
Source modelClosed, with open-source components
Initial releaseJune 29, 2007 (2007-06-29)
Latest release17.4.1[1] (March 21, 2024 (2024-03-21)) [±]
Latest preview17.5 beta 3[2] (April 23, 2024 (2024-04-23)) [±]
Marketing targetSmartphones, tablet computers, portable media players
Available in41 languages[3]
List of languages
Arabic, Bulgarian, Catalan, Chinese Simplified, Chinese Traditional (Hong Kong), Chinese Traditional (Taiwan), Croatian, Czech, Danish, Dutch, English (Australia), English (United Kingdom), English (United States), Finnish, French (Canada), French (France), German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Kazakh, Korean, Malay, Norwegian, Polish, Portuguese (Brazil), Portuguese (Portugal), Romanian, Russian, Slovak, Spanish (Latin America), Spanish (Spain), Swedish, Thai, Turkish, Ukrainian, Vietnamese
Update methodOTA (since iOS 5), Finder (from macOS Catalina onwards),[4] Apple Devices (from Windows 10 version 22H2 onwards)[5] or iTunes (Windows and macOS pre-Catalina)
Kernel typeHybrid (XNU)
user interface
Multi-touch, graphical user interface
LicenseProprietary software except for open-source components
Support status
Articles in the series
iOS version history

iOS (formerly iPhone OS)[6] is a mobile operating system developed by Apple Inc. exclusively for its smartphones. It was unveiled in January 2007 for the first-generation iPhone,[7] launched in June 2007.

It is the operating system that powers many of the company's mobile devices, including the iPhone. It was also used on iPads (introduced: January 2010; availability: April 2010) until iPadOS was introduced in 2019, and on the iPod Touch devices, which were discontinued in mid-2022.[8] It is the world's second-most widely installed mobile operating system, after Android. It is the basis for three other operating systems made by Apple: iPadOS, tvOS, and watchOS.[9]

As of December 2023, Apple's App Store contains more than 3.8 million iOS applications.[10] These mobile apps have collectively been downloaded more than 130 billion times.

iOS is based on macOS. Like macOS, it includes components of the Mach microkernel and FreeBSD.[11][12] It is a Unix-like operating system. Although some parts of iOS are open source under the Apple Public Source License[13] and other licenses,[14] iOS is proprietary software.[15][16]

Major versions of iOS are released annually. The current stable version, iOS 17, was released to the public on September 18, 2023.[17]

  1. ^ Clover, Juli (March 21, 2024). "Apple Releases iOS 17.4.1 and iPadOS 17.4.1 With Bug Fixes and Security Improvements". MacRumors. Retrieved March 26, 2024.
  2. ^ Clover, Juli (April 23, 2024). "Apple Seeds Third Betas of iOS 17.5 and iPadOS 17.5 to Developers". MacRumors. Retrieved April 23, 2024.
  3. ^ "iOS and iPadOS – Feature Availability". Apple Inc. Archived from the original on May 12, 2023. Retrieved May 16, 2023.
  4. ^ Tim Brookes (October 17, 2019). "Where Are iTunes Features in macOS Catalina?". How-To Geek. Archived from the original on October 27, 2019. Retrieved October 27, 2019.
  5. ^ "Apple Devices Preview - Official app in the Microsoft Store".
  6. ^ "iOS: A visual history". The Verge. December 13, 2011. Archived from the original on April 12, 2017. Retrieved July 24, 2022.
  7. ^ "Apple Reinvents the Phone with iPhone". Apple Newsroom. Retrieved December 16, 2023.
  8. ^ "The music lives on". Apple Newsroom. Archived from the original on May 11, 2022. Retrieved June 28, 2022.
  9. ^ Espósito, Filipe (April 13, 2020). "HomePod now runs on tvOS, here's what that could mean". 9to5Mac. Archived from the original on April 14, 2020. Retrieved December 22, 2022.
  10. ^ "Number of apps from the Apple App Store 2022". Statista. Retrieved December 16, 2023.
  11. ^ "Is Mac Os X Microkernel? – LEMP". Retrieved December 16, 2023.
  12. ^ "iOS/About iOS/ at master · writeups/iOS". GitHub. Retrieved December 16, 2023.
  13. ^ "License - APSL". Retrieved December 16, 2023.
  14. ^ "Software License Agreement". Retrieved December 16, 2023.
  15. ^ "Apple Open Source". Archived from the original on September 24, 2020. Retrieved September 25, 2020.
  16. ^ Rogucki, Michał (October 28, 2023). "Why is iOS not open source?". TS2 SPACE. Retrieved December 16, 2023.
  17. ^ Clover, Juli (September 18, 2023). "Apple Releases iOS 17 With StandBy, Live Voicemail, Improved Autocorrect, FaceTime Video Messages and Tons More". MacRumors. Retrieved September 18, 2023.

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