The App Library is a feature on iOS devices that organizes all installed applications into a single, easy-to-navigate view. It automatically categorizes apps into folders based on their functions, such as Social, Productivity, and Entertainment, making it simpler for users to find what they need without scrolling through multiple home screens. Introduced in iOS 14, the App Library can be accessed by swiping left past the last home screen. It also includes a search bar at the top, allowing users to quickly locate specific apps. This feature enhances user experience by decluttering the home screen and providing a more efficient way to manage applications.