Operating Systems

iOS

Definition

iOS 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, including the iPhone and iPod Touch.

Why It Matters

iOS, along with Android, is one of the two dominant mobile operating systems in the world. Its focus on user experience, security, and the curated App Store has set a high standard for mobile computing.

Contextual Example

A user downloads an app from the App Store onto their iPhone. The iOS operating system manages the app's installation, security permissions, and access to hardware like the camera and GPS.

Common Misunderstandings

  • iPadOS is a variant of iOS that is specifically designed for the larger screen and multitasking capabilities of the iPad.
  • iOS is a closed ecosystem; apps can generally only be installed through the official Apple App Store.

Related Terms

Last Updated: December 17, 2025