The version history of the

mobile operating system A mobile operating system is an operating system An operating system (OS) is system software System software is software designed to provide a platform for other software. Examples of system software include operating systems like macOS ...

iOS iOS (formerly iPhone OS) is a mobile operating system A mobile operating system is an operating system An operating system (OS) is system software System software is software designed to provide a platform for other software. Examples o ...

iOS

, developed by

Apple Inc. Apple Inc. is an American multinational Multinational may refer to: * Multinational corporation, a corporate organization operating in multiple countries * Multinational force, a military body from multiple countries * Multinational state, ...

, began with the release of

iPhone OS iOS (formerly iPhone OS) is a mobile operating system A mobile operating system is an operating system An operating system (OS) is system software System software is software designed to provide a platform for other software. Examples o ...

for the original iPhone on June 29, 2007. Since its initial release, it has been used as the operating system for

iPhone {{Infobox information appliance , name = iPhone , logo = , image = , caption = The front face of an iPhone 13 Pro The iPhone 13 Pro and iPhone 13 Pro Max are smartphones designed and marketed by Apple Inc. They are the flagship smart ...

iPhone

iPad iPad is a line of tablet computer A tablet computer, commonly shortened to tablet, is a mobile device A mobile device (or handheld computer) is a computer A computer is a machine that can be programmed to carry out sequenc ...

iPad

iPod Touch The iPod Touch is a line of iOS iOS (formerly iPhone OS) is a mobile operating system created and developed by Apple Inc. exclusively for its hardware. It is the operating system that powers many of the company's mobile devices, includ ...

, and

HomePod The HomePod is a smart speaker developed by Apple Inc. The HomePod was designed to work with the Apple Music subscription service. The HomePod was announced on June 5, 2017, at the Apple Worldwide Developers Conference. Its launch was later del ...

, seeing continuous development since then, resulting in new major releases of the software typically being announced at the annual

Apple Worldwide Developers Conference Apple Worldwide Developers Conference (WWDC) is a conference held annually by Apple Inc. Apple Inc. is an American multinational Multinational may refer to: * Multinational corporation, a corporate organization operating in multiple cou ...

and later released in September, coinciding with the release of new iPhone models. Starting with the 13.0 release, the operating system for iPad was split off as

iPadOS iPadOS is a mobile operating system developed by Apple Inc. for its iPad line of tablet computers. It is a rebranded variant of iOS, the operating system used by Apple's iPhones, renamed to reflect the diverging features of the two product li ...

. The latest stable version of iOS and iPadOS, 15.2.1, was released on January 12, 2022. The latest beta version of iOS and iPadOS, 15.3 beta 2, was released on January 12, 2022. Updates can be done over-the-air through Settings (since #iOS 5, iOS 5), or via the iTunes or Finder (software), Finder applications.

Overview

June 2007 saw the official release of what eventually became iOS – concurrently with the first iPhone. iOS did not have an official name until the official release of the iPhone software development kit (IOS SDK, iPhone SDK) on March 6, 2008. Before then, Apple marketing simply stated that iPhone ran a version of macOS, Mac OS X made specifically for the iPhone. When iOS was introduced, it was named ''iPhone OS''. It was officially renamed iOS on June 7, 2010, with the announcement and introduction of the iPad (1st generation), first-generation iPad. The introduction of what would later become the iPad line, and the existence of iPod Touch, meant the iPhone was no longer the only device to run the mobile operating system. iOS 4 was the first major iOS release that reflected the name change. Apple licensed the "iOS" trademark from Cisco Systems. Apple concurrently provides the same version of iOS for the comparable model of iPhone and iPod Touch, usually devices released in the same calendar year. iPhone users receive all software updates for free, while iPod Touch users paid for the 2.0 and 3.0 major software updates. As of iOS 4, Apple no longer charges for iPod Touch updates. four versions of iOS were not publicly released, with the version numbers of three of them changed during development. iPhone OS 1.2 was replaced by a 2.0 version number after the first beta; the second beta was named 2.0 beta 2 instead of 1.2 beta 2. The second was iOS 4.2, replaced with 4.2.1 due to a Wi-Fi bug in 4.2 beta 3, causing Apple Inc., Apple to release 2 golden masters (4.2 GM and 4.2.1 GM). The third was iOS 13.4.5, which was renamed to iOS 13.5 when Beta 3 was released, with the introduction of the Exposure Notification API, which required an SDK update. Similarly, iOS 13.5.5 was renamed to iOS 13.6 in beta 2, with the introduction of new features for the Health app. One version of iOS was pulled back by Apple ''after'' being released (iOS 8.0.1) due to issues with cellular service and Touch ID on iPhone 6 and iPhone 6 Plus units.

Version history

iPhone OS 1

Apple announced iPhone OS 1 at the iPhone keynote on January 9, 2007, and it was released to the public alongside the original iPhone (1st generation), iPhone on June 29, 2007. No official name was given on its initial release; Apple marketing literature simply stated the iPhone runs a version of Apple's desktop operating system, OS X. The release of iPhone OS 1.1 brought support for the iPod Touch (1st generation). iPhone OS 1.1.5 was the final version of iPhone OS 1. It became unsupported on May 18, 2010.

iPhone OS 2

Apple announced iPhone OS 2 at the iPhone software roadmap keynote in March 2008, and it was released to the public on July 11, 2008, alongside the iPhone 3G. Apple did not drop support for any devices with this release. iPhone OS 2 was compatible with all devices released up to that time. The release of iPhone OS 2.1.1 brought support for the iPod Touch (2nd generation). iPhone OS 2.2.1 was the final version of iPhone OS 2.

iPhone OS 3

Apple announced iPhone OS 3 on March 17, 2009, and it was released to the public on June 17, 2009, alongside the iPhone 3GS. Apple did not drop support for any devices with this release. iPhone OS 3 was compatible with all devices released up to that time, but not all features were available on the original iPhone (1st generation), iPhone. The final release supported on the original iPhone and iPod Touch (1st generation) was iPhone OS 3.1.3. The first iPad (1st generation), iPad was introduced along with iPhone OS 3.2.

iOS 4

Apple announced iOS 4 in March 2010 and it was released to the public on June 21, 2010, alongside the iPhone 4. With this release, Apple dropped support for iPhone (1st generation), the original iPhone and the iPod Touch (1st generation), 1st generation iPod Touch, which is the first time Apple had dropped support for any device in an iOS release. The iPhone 3G and the iPod Touch (2nd generation), 2nd generation iPod Touch were capable of running iOS 4, but had limited features. For example, both devices lack multitasking capabilities and the ability to set a home screen wallpaper. However, iOS 4 was the first major release that iPod Touch users did not have to pay any money for. The release of iOS 4.2.1 brought compatibility to the original iPad (1st generation), iPad and was the final release supported on the iPhone 3G and 2nd generation iPod Touch due to major performance issues. The release of iOS 4.3 brought iPad 2 compatibility.

iOS 5

Apple announced iOS 5 on June 6, 2011, at its annual Apple Worldwide Developers Conference (WWDC) event, and it was released to the public on October 12, 2011, alongside the iPhone 4S. Apple did not drop support for any devices with this release; support for the iPhone 3G and the iPod Touch (2nd generation) had already been dropped with the release of iOS 4.3 seven months earlier due to major performance issues. Therefore, iOS 5 was released for the iPhone 3GS onwards, iPod Touch (3rd generation) onwards, and the iPad (1st generation) and iPad 2. The release of iOS 5.1 brought support for the iPad (3rd generation). iOS 5.1.1 was the final release supported for the original iPad and iPod Touch (3rd generation).

iOS 6

Apple announced iOS 6 on June 11, 2012, at its annual Apple Worldwide Developers Conference (WWDC) event, and it was released to the public on September 19, 2012, alongside the iPhone 5, iPod Touch (5th generation), and iPad (4th generation). With this release, Apple dropped support for the iPod Touch (3rd generation) and the iPad (1st generation) due to performance issues, and offered only limited support on the iPhone 3GS and iPod Touch (4th generation). The iPhone 4 onwards, the iPod Touch (5th generation), the iPad 2 onwards and the iPad Mini (1st generation) were fully supported. iOS 6.1.6 was the final release supported for the iPhone 3GS and iPod Touch (4th generation).

iOS 7

Apple announced iOS 7 on June 10, 2013, at its annual Apple Worldwide Developers Conference (WWDC) event, and it was released to the public on September 18, 2013, alongside the iPhone 5C and iPhone 5S. With this release, Apple dropped support for the iPhone 3GS due to hardware limitations and the iPod Touch (4th generation) due to performance issues. iOS 7 has limited support on the iPad 2 and the iPhone 4 since they do not support Siri. However, other devices from the iPhone 4S onwards, iPod Touch (5th generation) onwards, the iPad (3rd generation) onwards, and the iPad Mini (1st generation) onwards were fully supported. The release of iOS 7.0.3 brought support for the iPad Air and iPad Mini 2. iOS 7.1.2 was the final release on the iPhone 4.

iOS 8

Apple announced iOS 8 on June 2, 2014, at its annual Apple Worldwide Developers Conference (WWDC) event, and it was released to the public on September 17, 2014, alongside the iPhone 6 and iPhone 6 Plus. With this release, Apple dropped support for one device, the iPhone 4. iOS 8 has limited support on the iPad 2, iPhone 4S, iPad (3rd generation), iPad Mini (1st generation), and the iPod Touch (5th generation), as Apple received widespread complaints of extremely poor/slow performance from owners of these devices. All other devices from the iPhone 5 onwards, iPod Touch (6th generation) onwards, the iPad (4th generation) onwards, and the iPad Mini 2 onwards were fully supported. The release of iOS 8.1 brought support for the iPad Air 2 and iPad Mini 3, and the release of iOS 8.4 brought support for the iPod Touch (6th generation). iOS 8.3 was the first version of iOS to have public beta testing available, where users could test the beta for upcoming releases of iOS and send feedback to Apple about bugs or issues. The final version of iOS 8 was iOS 8.4.1.

iOS 9

Apple announced iOS 9 on June 8, 2015, at its annual Apple Worldwide Developers Conference (WWDC) event, and it was released to the public on September 16, 2015, alongside the iPhone 6S, iPhone 6S Plus and iPad Mini 4. With this release, Apple did not drop support for any iOS devices. Therefore, iOS 9 was supported on the iPhone 4S onwards, iPod Touch (5th generation) onwards, the iPad 2 onwards, and the iPad Mini (1st generation) onwards. However, iOS 9 has limited support on devices with an Apple A5 or A5X processor: the iPhone 4S, iPad 2, iPad (3rd generation), iPad Mini (1st generation), and iPod Touch (5th generation). This release made the iPad 2 the first device to support six major releases of iOS, supporting iOS 4 thru iOS 9. Despite Apple's promise of better performance on these devices, there were still widespread complaints that the issue had not been fixed. iOS 9.3.5 is the final release on the iPod Touch (5th generation), the Wi-Fi-only iPad 2, the Wi-Fi-only iPad (3rd generation), and the Wi-Fi-only iPad Mini (1st generation). iOS 9.3.6 is the final release on the iPhone 4S, the Wi-Fi + cellular iPad 2, the Wi-Fi + cellular iPad (3rd generation), and the Wi-Fi + cellular iPad Mini (1st generation).

iOS 10

Apple announced iOS 10 on June 13, 2016, at its annual Apple Worldwide Developers Conference (WWDC) event, and it was released to the public on September 13, 2016, alongside the iPhone 7 and iPhone 7 Plus. With this release, Apple dropped support for devices using an Apple A5, A5 or Apple A5X, A5X processor: the iPhone 4S, the iPad 2, iPad (3rd generation), iPad Mini (1st generation), and iPod Touch (5th generation). iOS 10 has limited support on devices with 32-bit processors: the iPhone 5, iPhone 5C, and iPad (4th generation). However, the iPhone 5S onwards, iPod Touch (6th generation), iPad Air onwards, and the iPad Mini 2 onwards are fully supported. The release of iOS 10.2.1 brought support for the iPad (5th generation), and iOS 10.3.2 brought support for the iPad Pro (10.5-inch) and the iPad Pro (12.9-inch, 2nd generation). iOS 10.3.3 is the final supported release for the iPhone 5C and the Wi-Fi-only iPad (4th generation). iOS 10.3.4 is the final supported release for the iPhone 5 and the Wi-Fi + cellular iPad (4th generation). iOS 10 is the last iOS version to run on 32-bit processors and also the last to run 32-bit apps.

iOS 11

Apple announced iOS 11 on June 5, 2017, at its annual Apple Worldwide Developers Conference (WWDC) event, and it was released to the public on September 19, 2017, alongside the iPhone 8 and iPhone 8 Plus. With this release, Apple dropped support for the 32-bit iPhone 5, iPhone 5C, and iPad (4th generation), and also dropped support for 32-bit applications, making iOS a 64-bit-only OS that only runs 64-bit apps. iOS 11 has limited support on devices with the Apple A7 or A8 processors: the iPhone 5S, iPhone 6/6 Plus, iPod Touch (6th generation), iPad Air, iPad Air 2, iPad Mini 2, 3, and 4. However, all other devices from the iPhone 6S, iPhone 6S/6S Plus onwards, iPhone SE (1st generation), iPad Pro, and iPad (5th generation) onwards are fully supported. iOS 11.0.1 brought support for the iPhone X and iOS 11.3 brought support for the iPad (6th generation). The final version of iOS 11 to be released was iOS 11.4.1.

iOS 12

Apple announced iOS 12 on June 4, 2018, at its annual Apple Worldwide Developers Conference (WWDC) event, and it was released to the public on September 17, 2018, alongside the iPhone XS, iPhone XS Max and iPhone XR. With this release, Apple did not drop support for any iOS devices. Therefore, iOS 12 was supported on the iPhone 5S onwards, iPod Touch (6th generation), the iPad Air onwards, and the iPad Mini 2 onwards. However, iOS 12 has limited support on devices with the Apple A7 or Apple A8, A8 processors: the iPhone 5S, iPhone 6, iPhone 6/6 Plus, iPod Touch (6th generation), iPad Air, iPad Air 2, iPad Mini 2, iPad Mini 3, 3, and iPad Mini 4, 4. All other devices from the iPhone 6S, iPhone 6S/6S Plus onwards, the iPad Air (2019), the iPad (5th generation) onwards, and all iPad Pro models are fully supported. iOS 12.1 brought support to the iPad Pro (12.9-inch, 3rd generation) and iPad Pro (11-inch, 1st generation) and iOS 12.2 brought support to the iPad Mini (5th generation) and iPad Air (3rd generation). iOS 12.5.5 is the latest supported release for the iPhone 5S, iPhone 6, iPhone 6 Plus, iPad Air (1st generation), iPad mini 2, iPad mini 3, and iPod touch (6th generation).

iOS 13 / iPadOS 13

Apple announced iOS 13 on June 3, 2019, at its annual Apple Worldwide Developers Conference (WWDC) event, and it was released to the public on September 19, 2019, alongside the iPhone 11 series (11, 11 Pro, 11 Pro Max). The principal features include dark mode and Memoji support for A9+ devices. The Near-field communication, NFC framework now supports reading several types of contactless smartcards and tags. The iPad gains several tablet-oriented features, and its operating system has been rebranded as

; iPadOS 13 was announced at the 2019 WWDC as well. With this release, Apple dropped support for all devices with less than 2 GB of RAM, which included the iPhone 5S and IPhone 6, iPhone 6 and 6 Plus, iPod Touch (6th generation), iPad Mini 2, iPad Mini 3, and iPad Air. iOS 13/iPadOS 13 has limited support on devices with the Apple A8, A8/Apple A8X, A8X. However, all other devices from the iPhone 6s, iPhone 6s/6s Plus onwards, iPod Touch (7th generation), iPad Pro (1st generation), iPad (2017), iPad (5th generation), and iPad Mini (5th generation) onwards are fully supported (A9 and A10 devices having almost full support, A11 and on having full support). iOS 13 brought support for the iPhone 11 and IPhone 11 Pro, iPhone 11 Pro / Pro Max, iPhone SE (2nd generation), second-generation iPhone SE, and iPadOS 13 brought support for the iPad (2019), iPad (7th generation), the iPad Pro (12.9-inch, 4th generation) and the iPad Pro (11-inch, 2nd generation).

iOS 14 / iPadOS 14

Apple announced iOS 14 and iPadOS 14 on June 22, 2020, at its annual Apple Worldwide Developers Conference#2020, WWDC 2020 event, with a developer beta released on the same day and a public beta released on July 9, 2020. iOS 14 and iPadOS 14 were released on September 16, 2020, alongside the IPad (8th generation), iPad (8th Generation) and IPad Air (4th generation), iPad Air (4th Generation). All devices that supported iOS 13 also support iOS 14. This makes the iPad Air 2 the first device to support seven versions of iOS and iPadOS, from iOS 8 to iPadOS 14. Some new features introduced in iOS 14 and iPadOS 14 include redesigned widgets that can now be placed directly on the homescreen (only for iOS), along with the App Library, which automatically categorizes apps into one page, Picture in Picture in iPhone and iPod touch, and the CarKey technology to unlock and start a car with NFC. iOS and iPadOS 14 also allow the user to have incoming calls shown in banners rather than taking up the whole screen (the latter view is still available as an optional function). The release of iPadOS 14.0 brought support for the iPad (2020), 8th generation iPad and the iPad Air (2020), 4th generation iPad Air and the release of iOS 14.1 brought support for the iPhone 12, the iPhone 12 Mini and the iPhone 12 Pro, iPhone 12 Pro and Pro Max. iOS 14 and iPadOS 14 have limited support on devices with A8, A8X, A9, A9X, and A10 Fusion chips, whereas devices with A10X Fusion and A11 Bionic chip have almost full support, and devices with A12 Bionic chip and later have full support.

iOS 15 / iPadOS 15

Apple announced iOS 15 and iPadOS 15 on June 7, 2021, at its annual Apple Worldwide Developers Conference#2021, WWDC 2021 event, with a developer beta released on the same day and a public beta released a few weeks later, at the end of June 2021. All devices that supported iOS 13, iPadOS 13, iOS 14, and iPadOS 14 also support iOS 15 and iPadOS 15. However, iOS 15 and iPadOS 15 have limited support on devices with A8, A8X, A9, A9X, A10 Fusion, A10X Fusion, and A11 Bionic chips, which include iPhone 6S, iPhone 7, iPhone 8, iPhone X, iPhone SE (1st generation), iPod Touch (7th generation), iPad (5th generation), iPad (6th generation), iPad (7th generation), iPad Air 2, iPad Mini 4, iPad Pro (1st generation), and iPad Pro (2nd generation).

Notable software bugs and issues in iOS

Device codes

;

: iPhone (1st generation) : iPhone 3G : iPhone 3GS : iPhone 4 (GSM version) : iPhone 4 (CDMA version) : iPhone 4S : iPhone 5 : iPhone 5C : iPhone 5S : iPhone 6 : iPhone 6 Plus : iPhone 6S : iPhone 6S Plus : iPhone SE (1st generation) : iPhone 7 with Intel PMB9943 modem : iPhone 7 with Qualcomm MDM9645 modem : iPhone 7 Plus with Intel PMB9943 modem : iPhone 7 Plus with Qualcomm MDM9645 modem : iPhone 8 with Intel PMB9948 modem : iPhone 8 with Qualcomm MDM9655 modem : iPhone 8 Plus with Intel PMB9948 modem : iPhone 8 Plus with Qualcomm MDM9655 modem : iPhone X with Intel PMB9948 modem : iPhone X with Qualcomm MDM9655 modem : iPhone XS : iPhone XS Max : iPhone XR : iPhone 11 : iPhone 11 Pro : iPhone 11 Pro Max : iPhone SE (2nd generation) : iPhone 12 : iPhone 12 Mini : iPhone 12 Pro : iPhone 12 Pro Max : iPhone 13 : iPhone 13 Mini : iPhone 13 Pro : iPhone 13 Pro Max ;

: iPad (1st generation) Wi-Fi only : iPad (1st generation) Wi-Fi+3G : iPad 2 Wi-Fi-only : iPad 2 Wi-Fi+3G GSM : iPad 2 Wi-Fi+3G CDMA : iPad 3 Wi-Fi-only : iPad 3rd generation Wi-Fi+4G (LTE (telecommunication), LTE) (AT&T/global version) : iPad 3rd generation Wi-Fi+4G (LTE) (Verizon Wireless, Verizon version) : iPad 4th generation Wi-Fi-only : iPad 4th generation Wi-Fi+4G (LTE) (AT&T/global version) : iPad 4th generation Wi-Fi+4G (LTE) (Verizon version) : iPad Air Wi-Fi-only : iPad Air Wi-Fi+4G (LTE) (AT&T/global version) : iPad Air Wi-Fi+4G (LTE) (Verizon version) : iPad Air 2 Wi-Fi-only : iPad Air 2 Wi-Fi+4G (LTE) (AT&T/global version) : iPad (2017) Wi-Fi-only : iPad (2017) Wi-Fi+4G (LTE) (AT&T/global version) : iPad (2018) Wi-Fi-only : iPad (2018) Wi-Fi+4G (LTE) (AT&T/global version) : iPad Air (2019) Wi-Fi-only : iPad Air (2019) Wi-Fi+4G (LTE) (AT&T/global version) : iPad (2019) Wi-Fi-only : iPad (2019) Wi-Fi+4G (LTE) (AT&T/global version) : iPad Air (2020) Wi-Fi-only : iPad Air (2020) Wi-Fi+4G (LTE) (AT&T/global version) : iPad (2020) Wi-Fi-only : iPad (2020) Wi-Fi+4G (LTE) (AT&T/global version) ;iPad Mini : iPad Mini (1st generation) Wi-Fi-only : iPad Mini (1st generation) Wi-Fi+4G (LTE) : iPad Mini 2 Wi-Fi-only : iPad Mini 2 Wi-Fi+4G (LTE) : iPad Mini 3 Wi-Fi-only : iPad Mini 3 Wi-Fi+4G (LTE) : iPad Mini 4 Wi-Fi-only : iPad Mini 4 Wi-Fi+4G (LTE) : iPad Mini (5th generation) Wi-Fi-only : iPad Mini (5th generation) Wi-Fi+4G (LTE) : iPad Mini (6th generation) Wi-Fi-only : iPad Mini (6th generation) Wi-Fi+4G (LTE) ;iPad Pro : iPad Pro (1st generation (12.9-inch)) Wi-Fi-only : iPad Pro (1st generation (12.9-inch)) Wi-Fi+4G (LTE) : iPad Pro (9.7-inch) Wi-Fi-only : iPad Pro (9.7-inch) Wi-Fi+4G (LTE) : iPad Pro (2nd generation (12.9-inch)) Wi-Fi-only : iPad Pro (2nd generation (12.9-inch)) Wi-Fi+4G (LTE) : iPad Pro (10.5-inch) Wi-Fi-only : iPad Pro (10.5-inch) Wi-Fi+4G (LTE) : iPad Pro (3rd generation (12.9-inch)) Wi-Fi-only : iPad Pro (3rd generation (12.9-inch)) Wi-Fi+4G (LTE) : iPad Pro (1st generation (11-inch)) Wi-Fi-only : iPad Pro (1st generation (11-inch)) Wi-Fi+4G (LTE) : iPad Pro (4th generation (12.9-inch)) Wi-Fi-only : iPad Pro (4th generation (12.9-inch)) Wi-Fi+4G (LTE) : iPad Pro (2nd generation (11-inch)) Wi-Fi-only : iPad Pro (2nd generation (11-inch)) Wi-Fi+4G (LTE) : iPad Pro (5th generation (12.9-inch)) Wi-Fi-only : iPad Pro (5th generation (12.9-inch)) Wi-Fi+4G (LTE) : iPad Pro (3rd generation (11-inch)) Wi-Fi-only : iPad Pro (3rd generation (11-inch)) Wi-Fi+4G (LTE) : ;

(1st generation) : iPod Touch (2nd generation) : iPod Touch (3rd generation) : iPod Touch (4th generation) : iPod Touch (5th generation) : iPod Touch (6th generation) : iPod Touch (7th generation) ;

(1st generation) : HomePod Mini (1st generation)

References

External links

* – official site {{Apple IOS, * Lists of operating systems Software version histories Tablet operating systems