Apple has released watchOS 2, the first major software update for its Apple Watch. The 515MB update was delayed last week, missing its launch date last Wednesday due to a bug. The list of new features and capabilities within the update is lengthy. Users can update to watchOS 2 from the Apple Watch app on the iPhone paired to Apple Watch. To download and install the update, the watch must be in range of a Wi-Fi connected iPhone and connected to its charger, and Apple Watch must be charged to at least 50 percent of its battery life.