Apple has released new software updates for Apple Watch owners, as watchOS 6.1.3 and watchOS 5.3.5 are now available for download. If you aren’t on iOS 13 yet because of an older iPhone, watchOS 5.3.5 is for your Apple Watch.
According to watchOS 6.1.3 release notes, Apple says “this update includes improvements and bug fixes, including a fix for an issue that prevented the irregular heart rhythm notification from working as expected for Apple Watch owners in Iceland.”
The watchOS 6.1.3 update comes in at 48.1 MB. You can update your Apple Watch by launching the Watch app on your iPhone, then going to Settings > General > Software Updates.