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Apple iOS new.svg
Company / developer Apple Inc.
Programmed in C, C++, Objective-C
OS family Unix-like (BSD), OS X
Working state Current
Source model Closed source
Initial release June 29, 2007; 12 years ago (2007-06-29)
Latest stable release
iPhone 4S, 5, 5C, 5S, 6, and 6 Plus
iPad 2, 3rd, 4th generations, Air and Air 2
iPad Mini 1st generation, 2 and 3
iPod Touch 5th generation

8.1 (Build 12A405)  (October 20, 2014; 5 years ago (2014-10-20))[1]

Apple TV 3rd generation

7.0 (Build 11D257c)  (September 17, 2014; 5 years ago (2014-09-17))[2]

Latest unstable release
iPhone 4S, 5, 5C, 5S, 6, and 6 Plus
iPad 2, 3rd, 4th generations and Air
iPad Mini 1st and 2nd generations
iPod Touch 5th generation

8.1 Beta 2 (Build 12B407)  (October 7, 2014; 5 years ago (2014-10-07))

Apple TV 3rd generations
7.0 Beta 4 (Build 12A4345d)  (August 4, 2014; 5 years ago (2014-08-04)) [±]
Available language(s) 34 languages[3][4][5][6]
Supported platforms 64- and 32-bit ARM architectures (iPhone, iPod, iPad, iPad Mini, and 2nd gen. and higher Apple TV), Apple A4, Apple A5, Apple A5X, Apple A6, Apple A6X, Apple A7
Kernel type Hybrid (XNU)
Default user interface Cocoa Touch (multi-touch, GUI)
License Proprietary EULA except for open-source components
Official website

iOS (previously named iPhone OS) is an operating system for mobile devices, made and sold by Apple Inc. It is the main operating system of the iPhone, the iPod Touch, and the iPad. It is Apple's mobile operating system for its iPhone, iPod touch, iPad, Apple TV and similar devices. iOS was originally called the iPhone OS but was renamed in 2010 to reflect the operating system’s evolving support for additional Apple devices.[7]


iPhone OS 1

iOS was released in 2007 simply known as running a version of OS X for the first generation iPhone. Apple said on January 9, 2007 at a conference that there will be a new product, the iPhone, and it would have a "revolutionary" operation system.[8]

On March 6, 2008, Apple renamed OS X to iPhone OS following the release of the iPhone software development kit.

iPhone OS 2

On July 11, 2008, along with the release of the iPhone 3G, Apple released iPhone OS 2.0, which introduced the App Store.

iPhone OS 3

In June 2009, Apple released iPhone OS 3.0, which was released along with the iPhone 3GS. It was a minor upgrade to iPhone OS 2.0 except it could do a few new things. iPhone OS 3.0 was available for the first iPhone and iPod Touch, but not all features were supported on those devices. The last version to support the first iPhone and iPod Touch was 3.1.3. It was later available for the iPad when it was released (as version 3.2).

In September 2009, Apple renamed "iPhone OS" to "iOS". The trademark "IOS" has been used by the tech company Cisco, so Apple licensed the trademark in order to avoid conflicts.[9]

iOS 4

In mid-2010, Apple also released a significant update, iOS 4.0, which added the ability of multitasking, the option to have a wallpaper for the home screen and gives the user the ability to run several apps at the same time, while the amount of apps are affected by the device's RAM. Not only that, but it also had a more polished design and was the first version of iOS to be available for the iPod Touch for free. Unfortunately, the iPhone 3G and iPod Touch (2nd generation) have limited features, meaning that they can't multitask or have a wallpaper for the home screen.

iOS 5

In October 2011, Apple released iOS 5, which introduced many new features such as the notifications pull-down bar, a free messaging service called iMessage, iCloud, and more. A voice assistant named Siri was also released to the iPhone 4S.

iOS 6

iOS 6 was released on September 19, 2012 with even more features. Siri was released to the iPad (3rd generation), iPod Touch (5th generation), and the iPhone 5. YouTube was removed and a YouTube app was added to the App Store. Google Maps was also removed and replaced with Apple Maps.

iOS 7

On September 18, 2013, iOS 7 was released with a new look and many features, and a new feature called "Control Center" where you can control basic settings, music, AirPlay, brightness, flashlight, and more.

iOS 8

On June 2, 2014, Apple announced iOS 8 at their annual Worldwide Developers Conference. It has several new features, such as a new app called Health, a feature called QuickType, which predicts which words you will type, and several other features.[10] It was officially released to everyone on September 17, 2014.

App Store

One of the most important software (app) in iOS is the App Store. The App Store is an electronic market which gives you the ability to buy "apps", small user interface applications. By January 2013, Apple confirmed to have more than 800,000 applications in the app store.[11]


  1. "iOS 8.1". Apple. October 20, 2014. Retrieved October 27, 2014.
  2. "About Apple TV (2nd and 3rd generation) software updates". Apple. 2014-04-22. Retrieved 2014-05-01.
  3. "Apple – iPad Air – View the technical specifications for iPad Air". Apple. Retrieved January 1, 2014.
  4. "Apple – iPad mini – View the technical specifications for iPad mini". Apple. Retrieved January 1, 2014.
  5. "Apple - iPhone 5c - Technical Specifications". Apple. Retrieved January 1, 2014.
  6. "Apple - iPhone 5s - Technical Specifications". Apple. Retrieved January 1, 2014.
  8. Honan, Matthew (January 9, 2007). "Apple unveils iPhone". Macworld. Retrieved January 16, 2010.
  9. Tartakoff, Joseph (June 7, 2010). "Apple Avoids iPhone-Like Trademark Battle Thanks To Cisco, FaceTime Deals [sic"]. paidContent. Retrieved February 2, 2011.
  10. "Apple announces iOS 8 at WWDC with continuity features, Messages enhancements, Quicktype keyboard, more". 9to5Mac. June 2, 2014. Retrieved June 13, 2014.