SAN FRANCISCO—Apple will release WatchOS 3 to all current Apple Watch users on September 13. The company announced the official release date as part of its September product event.

The update builds on the foundation laid in WatchOS 1 and 2 but also makes some major changes to the way the Apple Watch works. Apple has worked to make it easier to swipe between watch faces, has introduced an iOS-esque Control Center, and has introduced a “dock” of up to 10 apps that are loaded in memory and updated behind-the-scenes to make launching and using apps quicker. Docked apps have also killed “Glances,” which were similarly intended to make watch interactions faster but mostly failed because of communication and processing lag.

WatchOS 3 is intended to make the most of first-generation Apple Watch hardware, which Apple had optimized for battery life at the expense of some performance. Before you can update to WatchOS 3, you’ll also need to update your tethered iPhone to iOS 10.