Along with iOS 9.1, Apple released watchOS 2.0.1 on Wednesday. The update for Apple's smartwatch includes support for the new emoji in iOS 9.1, improved battery performance, and more.
watchOS 2.0.1 improves battery performance, more
The watchOS 2.0.1 update fixes an issue where software updates would stall, properly lets Calendar syncing work with managed iPhones and Apple Watch, fixed a problem where location information didn't update, stops Digital Touch from accidentally sending from an email address instead of a phone number, improved stability when using Live Photos as a watch face, and stops the sensors from staying on indefinitely when Siri is measuring heart rates.
watchOS 2.0.1 is a free update and requires iOS 9.1 on your iPhone before installing. To install watchOS 2.0.l launch the Watch app on your iPhone, then go to General > Software Update. Your iPhone needs to be connected to its charger and have at least a 50 percent charge before the update can install.