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iOS

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iOS
NameiOS
DeveloperApple Inc.
FamilyUnix-like
Source modelClosed source
Released29 June 2007
Latest release17.5.1
Latest release date20 May 2024
Marketing targetSmartphones, tablets, media players
LicenseProprietary software
Websiteapple.com/ios

iOS. It is a mobile operating system created by Apple Inc. exclusively for its hardware, including the iPhone, iPad, and iPod Touch. First unveiled in 2007 alongside the original iPhone (1st generation), it has since become one of the world's most dominant and influential software platforms, powering over a billion active devices. The system is renowned for its intuitive multi-touch interface, robust App Store ecosystem, and deep integration with Apple's services and other products like the Mac and Apple Watch.

History

The development of the operating system began under the project name "iPhone OS" in 2005, led by Scott Forstall and his team. It was first demonstrated to the public by Steve Jobs at the Macworld Conference & Expo in January 2007, showcasing revolutionary features like visual voicemail and a fully touch-based Safari browser. The first version, lacking an official public name, was released with the iPhone (1st generation) in June 2007. The platform expanded with the introduction of the App Store in 2008, catalyzing the modern mobile app economy. Major milestones include the rebranding to "iOS" in 2010, the introduction of the virtual assistant Siri with the iPhone 4S, and a significant visual overhaul with iOS 7 under the direction of Jony Ive. In 2019, the operating system for the iPad was forked into a separate platform named iPadOS.

Features

The user interface is based on direct manipulation using gestures such as tap, swipe, and pinch. The home screen, featuring a grid of app icons and a persistent dock, is central to navigation. Core applications include Phone, Messages, Mail, and Safari. The Control Center provides quick access to settings, and Spotlight offers system-wide search. Key integrated services are the App Store, Apple Music, Apple Pay, and iCloud. The platform supports extensive accessibility features like VoiceOver and has consistently introduced innovations such as Face ID, ARKit, and Live Text.

Architecture

iOS is derived from the Darwin foundation, sharing its Unix-like core with macOS. It employs a hybrid kernel based on the XNU kernel, which combines elements of the Mach and BSD kernels. The software stack is divided into four main layers: the Cocoa Touch layer for key frameworks, the Media layer for graphics and audio, the Core Services layer for fundamental system services, and the Core OS layer for low-level functionality. Security is architected around the Secure Enclave coprocessor for data protection and Touch ID/Face ID biometrics. The system uses the APFS file system and the Metal (API) for graphics.

Development

Software development for the platform primarily uses Apple's proprietary integrated development environment, Xcode, and the Swift programming language, though Objective-C is also supported. Developers utilize frameworks like UIKit and SwiftUI to build applications, which are distributed through the App Store following a review process governed by App Store Review Guidelines. Major updates to the operating system are announced annually at the WWDC and released to the public in the fall, alongside new iPhone hardware. The developer program, now part of the Apple Developer Program, provides necessary tools and resources for creating, testing, and distributing apps.

Security and privacy

The system employs a comprehensive security model known as sandboxing, which restricts app capabilities and file system access. All apps from the App Store must be digitally signed with a certificate from Apple Inc., and the jailbreaking of devices to remove these restrictions is actively discouraged and can void warranties. Data encryption is enforced by default, with the Secure Enclave managing encryption keys for sensitive information. Privacy features include detailed privacy labels on the App Store, the App Tracking Transparency framework requiring user consent for tracking, and on-device processing for requests made to Siri.

Market share and adoption

Within the global smartphone market, iOS consistently holds a significant share of revenue and profits, though its unit market share is typically second to Android. In key markets like the United States, United Kingdom, and Japan, its share among smartphone users often exceeds 50%. The platform enjoys exceptionally high loyalty rates and a very active installed base, with a vast majority of users quickly adopting new major versions. Its ecosystem, including the App Store, generates immense revenue for developers and Apple Inc., contributing substantially to the company's services segment. The introduction of more affordable models like the iPhone SE has helped expand its reach in price-sensitive markets.

Category:IOS Category:Mobile operating systems Category:Apple Inc. software Category:2007 software