watchOS 10 was Apple's main operating system for Apple Watch models from September 2023 to September 2024It brought a redesign for larger displays, a focus on widgets, apps, new workout features, and stacks to Watch Faces.Apple added two new Watch Faces: Pallet and Snoopy.Cycling and Hiking workouts were revamped with new features.It includes Smart Stack widgets and Control Center button.WatchOS 10 expands mental health awareness with customizable plans on Apple Fitness Plus.Other features includes advanced workout APIs, enterprise capabilities, offline maps, and more.Users can also benefit from the new gestures introduced by watchOS 10.Compatible models for watchOS 10 are Apple Watch Series 4, Series 5, SE, Series 6, Series 7, Series 8, Ultra, Series 9, and Ultra 2.BGR review calls it a significant upgrade for the Apple Watch ecosystem.