Watch OS 1.0.1 includes performance improvements and bug fixes for Siri, measuring stand activity, calculating calories for indoor cycling and rowing workouts, distance and pace during outdoor walk and run workouts, accessibility, and third-party apps. The software update also includes support for new emojis found in iOS 8.3 and provides additional language support for Brazilian Portuguese, Danish, Dutch, Swedish, Russian, Thai, and Turkish.
Download it through the Apple Watch application on your phone.
Meanwhile, the big Android Wear 5.1.1 update is available by buying the new LG Watch Urbane, or for LG ZenWatch owners. Oh Google.