Along with the release of iOS 12.3, tvOS 12.3, and macOS Mojave 10.14.5, Apple today released watchOS 5.2.1 as a free upgrade for all compatible Apple Watch owners. The new software can be installed by heading over to the Apple Watch app on your iPhone. From there, access the Software update section and hit “Download and install” under the listing. You’ll need to have your Apple Watch on the charging puck to install the new upgrade to ensure you don’t run out of juice during the process.
In watchOS 5.2.1, mere bug fixes, security improvements, and speed enhancements are present. Therefore, don’t expect to find any user-facing changes or features worth mentioning.