Apple today released the fourth build of watchOS 4 for testing on registered developers’ Apple Watches. This comes nearly two weeks after the third build was released.
If your Apple Watch is registered under a Developer account, navigate to the Watch app on your paired iPhone and tap the “My Watch” tab. From there, go to General > Software Update and you should see the build ready for download. Be sure to place your iPhone on Wi-Fi while downloading this software as it’ll surely gobble up plenty of your data.
watchOS 4 includes new watch faces, improvements to fitness tracking, and more. We’ll update this article with any major changes worth noting found in the latest build.