Apple has released a maintenance update for the Apple Watch. watchOS 2.0.1 does not come with any new features but delivers a number of bug fixes and performance improvements as well as new emoji characters (which also made their way into OS X with 10.11.1 El Capitan and iOS with iOS 9.1).
Apple provides the following changelog:
- Fixes an issue that could cause software updates to stall
- Fixes issues that were impacting battery performance
- Resolves an issue that prevented a managed iPhone from syncing iOS Calendar events to Apple Watch
- Addresses an issue that could prevent location information from properly updating
- Fixes an issue that could cause Digital Touch to send from an email address instead of a phone number
- Addresses an issue that could cause instability when using a Live Photo as a watch face
- Resolves an issue that allows the sensors to stay on indefinitely when using Siri to measure heart rate
The watchOS 2.0.1 update weighs in at about 63MB. It requires that your iPhone is running iOS 9.0.2 or higher (Apple also released iOS 9.1 yesterday). It can be downloaded using the Apple Watch app by selecting General > Software Update.