Apple on Monday launched watchOS 5.2.1, an update for the Apple Watch primarily making bugfixes to the wearable device's operating system.
The update can be downloaded for any Watch with the exception of 2015 "Series 0" models. To install it, owners must have their iPhone fully updated, connected to Wi-Fi, and within Bluetooth range. The Watch must be on its charger and have at least 50 percent power.
At that point people can launch the "Watch" app in iOS, then navigate to Software Update under the General menu. From there an iPhone can fetch and install 5.2.1, a process which could take as long as an hour.
Apple went through multiple developer builds prior to today's release. Unlike iOS, tvOS, or macOS, no public betas were available due to the threat of accidentally bricking a Watch with no easy restore option.
watchOS 6 should debut during June 3's WWDC 2019 keynote before shipping this fall. It will presumably carry over iMessage, Health, and other upgrades from iOS 13, while also gaining unique improvements.