Along with dropping the first public beta of iOS 10.1 this morning, Apple also made watchOS 3.1 beta 3 available for download.
Apple Watch received some huge changes with watchOS 3.
How to install watchOS 3.1 beta 3
watchOS 3.1 beta 3 focuses mostly on bug fixes and under-the-hood improvements. The release notes for the new build mention some known issues with Apple Pay, Background Refresh, connectivity, HomeKit and WatchKit that Apple is working to resolve.
If you’re a developer, you can install the new beta on your Apple Watch by first installing iOS 10.1 beta 3 on your paired iPhone. Then install watchOS 3.1 beta 3 by going to Apple’s developer center on your iPhone and downloading the configuration file. Your Apple Watch must have at least 50 percent battery charge and be connected to power before you can install.
Previous builds of watchOS 3.1 focused on performance improvements.