Once a year Apple releases a major new version of watchOS, the operating system that runs on all Apple Watch models; there are also smaller point upgrades from time to time in between. These updates are free, and can add new features to your watch, improve its speed and fix bugs and glitches.
The latest version is watchOS 10, which includes a new simplified way to navigate the interface and quickly access content, redesigned apps, more focus on Widgets via the Smart Stack, and new cycling and hiking features. If you’d like to install it on your Apple Watch, you’ve come