iOS Version History

iOS History and Details About Each Version

Tim Cook talks about Apple iOS
Kevork Djansezian/Getty Images News/Getty Images

iOS is the name of the operating system that runs the iPhone, iPod touch, and iPad. It's the core software that comes loaded on all devices to allow them to run and support other apps. The iOS is to the iPhone what Windows is to PCs or Mac OS X is to Macs.

See our What is iOS? for a lot more on this innovative mobile operating system and how it works.

Below you'll find a history of each version of the iOS, when it was released, and what it added to the platform:

Find out if your device is iOS 9 compatible

iOS 9.3
Released: March 21, 2016

  • Night Shift
  • Touch ID security for Notes app
  • Support for pairing multiple Apple Watches to one iPhone
  • Wi-Fi Calling support on Verizon
  • Improvements to Apple Music and Maps in CarPlay
  • New 3D Touch shortcuts 

iOS 9.2.1
Released: Jan. 19, 2016

  • Bug fixes

iOS 9.2
Released: Dec. 8, 2015

  • Feature improvements to Apple Music and News
  • 3D Touch support in iBooks
  • Bug fixes and stability improvements

iOS 9.1
Released: Oct. 21, 2015

  • New emojis
  • Support for iPad Pro
  • Bug fixes and stability improvements

iOS 9.0.2
Released: Sept. 30, 2015

  • Bug fixes

iOS 9.0.1
Released: Sept. 23, 2015

  • Bug fixes

iOS 9.0
Released: Sept. 16, 2015

  • Maps app with mass transit directions
  • Proactive, Apple's Google Now competitor
  • Improved Siri
  • 3D Touch on iPhone 6S series
  • Live Photos
  • Low power mode for up to 3 hours of extra battery life
  • Overhauled Notes app
  • New apps: News, Switch to iOS, iCloud Drive
  • Improvements to HomeKit and CarPlay
  • Smaller file size for apps, less free space needed to update OS
  • Numerous other improvements
  • Support for iOS Public Beta program
  • Support for new devices like iPhone 6S series, iPad Pro, 4th gen. Apple TV

iOS 8.4.1
Released: Aug.

13, 2015

  • Bug fixes for Apple Music
  • Bug fixes for iCloud Music Library

iOS 8.4
Released: June 30, 2015

  • Apple Music
  • Fix for text-message bug that could crash phones with a single message
  • Other improvements and bug fixes

iOS 8.3
Released: April 8, 2015

  • Support for multicultural emojis
  • Siri support for Russian, Danish, Dutch, Thai, Swedish, Turkish and Portuguese
  • Ability to report iMessages as a spam
  • Numerous more subtle improvements and bug fixes 

iOS 8.2
Released: March 9, 2015

  • Support for Apple Watch
  • Apple Watch app that provides configuration options and App Store access
  • Improvements to the Health app
  • and many other improvements and bug fixes.

iOS 8.1
Released: Oct. 20, 2014

iOS 8.0
Released: Sept. 17, 2014

  • Notification Center widgets
  • Third-party keyboards
  • App extensions to provide functionality between apps
  • Support for Apple's Continuity and Handoff features with Mac OS X
  • iOS-to-Mac AirDrop support 
  • Healthkit support
  • Homekit support
  • Improvements to the Messages app, including voice messages and auto-expiring messages
  • Family Sharing
  • Wi-Fi calling.

iOS 7.1
Released: March 10, 2014

  • Support for CarPlay
  • New voices for Siri in Mandarin Chinese, UK English, Australian English, and Japanese
  • Added iTunes Radio features
  • Improvements to the Touch ID fingerprint scanner on the iPhone 5S
  • Enhancements to the Calendar app and accessibility features
  • Changes to improve performance on the iPhone 4
  • and many other improvements and bug fixes.

iOS 7.0.6
Released: Feb. 26, 2014

  • Bug fixes for major iOS security hole that allowed websites to fake security certificates

iOS 7.0.5
Released: Jan. 29, 2014

    iOS 7.0.4
    Released: Nov. 14, 2013

    • Mostly unspecified bug fixes

    iOS 7.0.3.
    Released: Oct. 22, 2013

    iOS 7.0.2
    Released: Sept. 26, 2013

    • Fix for lock screen bug
    • Greek language support to lock screen

    iOS 7
    Released: Sept. 18, 2013

    • New user interface
    • iTunes Radio
    • iTunes in the Car
    • Control Center
    • Improvements to Find My iPhone, including Activation Lock
    • Touch ID fingerprint scanner on iPhone 5S
    • AirDrop
    • Image filters built in Camera app
    • Hundreds of smaller changes

    iOS 6.1.5
    Released: Nov. 14, 2013

    • Bug fix for 4th generation iPod touch

    iOS 6.1.4
    Released: May 2, 2013

    • Bug fix for iPhone 5

    iOS 6.1.3
    Released: March 19, 2013

    • Bug fixes

    iOS 6.1.2
    Released: Feb. 19, 2013

    • Bug fixes for Microsoft Exchange

    iOS 6.1.1
    Released: Feb. 6, 2013

    iOS 6.1
    Released: Jan. 28, 2013

    • Improvements to Siri
    • More carrier support for LTE networks
    • Modifications to iCloud at device setup
    • Numerous minor enhancements
    • Bug fixes

    iOS 6.0.2
    Released: Dec. 18, 2012

    • Bug fixes on iPhone 5 and iPad mini

    iOS 6.0.1
    Released: Nov. 1, 2012

    • Bug fixes

    iOS 6
    Released: Sept. 19, 2012

    iOS 5.1.1

    Released: May 7, 2012

    • Improved reliability when using HDR photos from the lock screen short cut
    • Solved a problem with 2G/3G network switching
    • Fixed bug with AirPlay playback
    • Increased Safari bookmark and Reading List syncing
    • Removed an incorrect error that would report a failed iTunes Store purchase even when the purchase succeeded.

    iOS 5.1
    Released: March 7, 2012

    • Support for third-generation iPad
    • Updated camera app for third-generation iPad
    • Updated Camera shortcut from lockscreen
    • Genius Mixes and Playlists for iTunes Match
    • Japanese support for Siri
    • Update AT&T network indicator to show 4G in many locations
    • Bug fixes

    iOS 5.0.1
    Released: Nov. 10, 2011

    iOS 5
    Released: Oct. 12, 2011

    • Support for iCloud and iTunes Match
    • iMessage
    • System-wide integration of Twitter
    • Notification Center and updated lock screen to include notifications
    • Built-in Reader and Reminders apps; a read-later and to-do list app, respectively
    • Tweaks to the Camera app to add a camera shortcut to the lock screen and the ability to use the volume up button to take photos
    • Formatting-related tweaks to Mail app
    • Newsstand, a new app for reading magazines purchased through the App Store
    • Tweaks to Game Center app, including support for turn-based network games

    iOS 4.3.5/4.2.10
    Released: July 25, 2011

    • Fixes bugs and security holes

    iOS 4.3.4/4.2.9
    Released: July 15, 2011

    • Fixes bugs and security holes

    iOS 4.3.3/4.2.8
    Released: May 4, 2011

    • Reduces the size of the location awareness cache
    • No longer backs up location data during sync
    • Deletes location data when Location Services are turned off

    iOS 4.3.1
    Released: March 25, 2011

    • Graphics problem on 4th gen. touch
    • Bug when activating/connecting to wireless networks
    • Image flicker on TV out using Apple Digital AV Adapter
    • Problems authenticating to some web services

    iOS 4.3
    Released: March 11, 2011

    iOS 4.2.5
    Released: February 10, 2011

    • Adds support for the Verizon cellular network
    • Adds 3G Mobile Hotspot functionality for CDMA iPhones

    iOS 4.2
    Released: November 22, 2010

    • Brings all iOS 4 features to iPad
    • AirPrint wireless printing
    • AirPlay support
    • Extends GameCenter support to iPad
    • Free Find My iPhone service
    • Search in page in Safari
    • Software-based screen orientation lock for iPad
    • Assign unique tones to individual SMS senders

    iOS 4.1
    Released: September 2010

    • High Dynamic Range photos
    • Game Center
    • Many bug fixes (proximity sensor, Bluetooth, iPhone 3G)

    iOS / iPhone OS 4
    Released: June 22, 2010 for iPhone and iPod touch | Fall 2010 for iPad
    With this release, the iPhone OS was renamed iOS

    • Multitasking
    • Folders to organize apps
    • Unified email inbox and threaded email conversations
    • Improved security and business features
    • iBooks for iPhone, iPod touch
    • iAd
    • 100+ other fixes and features
    • Drops support for the original iPhone

    iPhone OS 3.2
    Released: April 3, 2010

    • This version of the OS is specific to the iPad and adds features and functionality for that device

    iPhone OS 3.1.3
    Released: Feb. 2, 2010

    • Improved battery status reporting
    • Fixes bug related to apps not launching
    • Fixes bug related to Japanese Kana keyboard
    • Various security fixes

    iPhone OS 3.1.2
    Released: Oct. 8, 2009

    • Bug fixes for network connection lost and problems waking from sleep.

    iPhone OS 3.1
    Released: Sept. 9, 2009

    • App Store Genius. Like the Genius feature for music, this tool recommends App Store programs based on what the user has previously enjoyed.
    • New Ringtones. While previous ringtones were user-creatable through iTunes, users can now buy pre-made ringtones from record labels through the included iTunes Store app.

    iPhone Firmware 3.0
    Released: June 17, 2009
    Sneak Preview: March 17, 2009 

    • Copy and paste
    • MMS, aka multimedia messaging service; text messages with photos and videos
    • Bluetooth connections between iPhones and iPod touches (the OS also unlocks the Bluetooth hardware included, but not currently used, in the second-generation iPod touch)
    • Bluetooth stereo streaming
    • Spotlight search functionality on the home page
    • Tethering, to allow use of iPhone as modem for computers (for an additional fee)
    • Background push notifications so apps can deliver content when they’re not being run
    • Support for peripherals through the dock connector
    • New app: Voice memos, which does what you’d expect from the name
    • A revised Stocks app
    • Landscape mode in mail, text, and notes
    • Voice Control of phone and iPod (iPhone 3GS only)
    • Notes that can sync to Macs and PCs, unlike in the current OS
    • Form auto-fill and anti-phishing tools in Safari
    • Shake-to-shuffle in the iPod app, a la the 4th-generation iPod nano
    • The ability to rent and purchase movies, TV, and audiobooks over the air
    • Parental controls and ratings for apps, iTunes content, etc.
    • Find my iPhone feature for lost phones via MobileMe; includes remote deletion of data as an option
    • Support for 30 new languages
    • Purchases within apps now supported, works in paid apps only

    iPhone Firmware 2.2.1
    Released: Jan. 27, 2009

    • Bug fixes related to Safari, camera roll and Mail
    • Bug fixes for iPod touch related to handling AAC files
    • Other bug and stability fixes

    iPhone Firmware 2.2
    Released: Nov. 21, 2008

    • Google Street View, with driving, walking, and public transit directions
    • Display address of dropped pins and share location via email
    • Over-the-air downloads of podcasts from the iTunes Store
    • Turn off text auto-correction
    • New home screen shortcut brings you to first page of Home screen
    • Bug fixes to reduce dropped called, improve Safari stability, improve mail fetching and display of HTML mail, improve sound quality in Visual Voicemail

    iPhone Firmware 2.1
    Released: Sept. 12, 2008

    • Decrease in call set-up failures and dropped calls
    • Significantly better battery life for most users
    • Dramatically reduced time to backup to iTunes
    • Improved email reliability, notably fetching email from POP and Exchange accounts
    • Faster installation of 3rd party applications
    • Fixed bugs causing hangs and crashes for users with lots of third party applications
    • Improved performance in text messaging
    • Faster loading and searching of contacts
    • Improved accuracy of the 3G signal strength display
    • Repeat alert up to two additional times for incoming text messages
    • Option to wipe data after ten failed passcode attempts
    • Genius playlist creation

    iPhone Firmware 2.0.2
    Released: August 18, 2008

    • Bug fixes

    iPhone Firmware 2.0.1
    Released: August 4, 2008

    • Bug fixes

    iPhone Firmware 2.0
    Released: July 11, 2008

    • Support for iPhone 3G
    • Support for App Store and third-party applications and games
    • Support for Microsoft Exchange
    • Support for 3G data and GPS, when the hardware is present

    iPhone Firmware 1.1.4
    Released: Feb. 26, 2008

    • Bug fixes

    iPhone Firmware 1.1.3
    Released: Jan. 15, 2008

    iPhone Firmware 1.1.2
    Released: Nov. 13, 2007

    • International Keyboard Support
    • Bug Fixes
    • Tacit approval for user-created ringtones

    iPhone Firmware 1.1.1
    Released: Sept. 27, 2007

    iPhone Firmware 1.0.2
    Released: Aug. 22, 2007

    • Increased speaker volume
    • Improved EDGE and WiFi reception
    • Closing user-created ringtone and program holes
    • Bug fixes

    iPhone Firmware 1.0.1
    Released: Aug. 1, 2007

    • Closing user-created ringtone and program holes
    • Bug fixes