When can I download and install watchOS 5? WatchOS 5 officially launches on September 17, 2018. WatchOS 5 includes new workouts, a redesigned user interface, walkie-talkie, advanced running features and many more improvements. Newest iPhone FAQs Can I use Nintendo Joy-Cons with iPhone? What are Focus filters on iPhone? Can I run watchOS 9 on my Apple Watch? tags: watchOS