watchOS 9.3 can be downloaded for free through the Apple Watch app on the iPhone by opening it up and going to General > Software Update. To install the new software, the Apple Watch needs to have at least 50 percent battery, it needs to be placed on a charger, and it needs to be in range of the iPhone.
The update adds new features, improvements, and bug fixes, including the Unity Mosaic watch face that was announced last week in celebration of Black History Month.
