The successor to iPadOS 14, it was announced at the company's Worldwide Developers Conference (WWDC) on June 7, 2021 along with iOS 15, macOS Monterey, watchOS 8, and tvOS 15.

The home screen grid is reduced by one row to accommodate the new widgets when placed (24 icons), and rotates in portrait orientation, just like iOS 12 and earlier.

[9] iPadOS 15 introduces the App Library from the iPhone in iOS 14 to the iPad.

The multi window shelf gives quick access to all running apps.

A new feature, called Quick Note, can be taken by swiping from the corner with fingers or the Apple Pencil, the Control Center or a keyboard shortcut.