Apple released watchOS 2.2 on Monday to go along with iOS 9.3. The update added support for pairing multiple watches with a single iPhone, and improved Maps support.
watchOS 2.2 lets you pair multiple Apple Watches with your iPhone
Maps now offers one-tap directions to get to home and work, as well as a search button and a Nearby button to help find restaurants, shopping, transportation, health-related facilities, and more. The update also includes bug fixes and performance improvements.
Adding support for multiple watches the issue that's clearly plaguing so many Apple Watch owners: How to easily switch between the multiple Apple Watch models they own. TO be fair, if someone wants a Sport model for outdoor activity and a stainless steel model for work, this does address the otherwise painful process of unpairing one watch and restoring the other from backup.
watchOS 2.2 is available as a free update in the Watch app after updating your iPhone to iOS 9.3. You can install the update by tapping General > Software Update.