apple wwdc 2018 Apple announced several new features for WatchOS 5, the upcoming next version of its smartwatch operating system during the WWDC keynote on Monday. WatchOS 5 will be released in the fall, and it'll be available for the Apple Watch Series 1 and newer models. This means that, unfortunately, WatchOS 5 won't be available for the original Apple Watch (the so-called Series 0), which was released in 2015.