iOS

iOS is the operating system that runs on Apple's mobile devices such as iPhone, iPad, and iPod Touch. It is a proprietary, closed-source operating system developed by Apple. iOS provides a user-friendly interface, a large collection of pre-installed apps, and access to the App Store, where users can download additional apps. It also offers features such as multi-tasking, touch-based controls, and integration with other Apple services such as iCloud and Apple Pay.