Apple has released watchOS 6.1.3 (17S811) to the public with bug fixes and improvements. The main update fix is for an issue that prevented the irregular heart rhythm notification from working as expected for Apple Watch owners in Iceland.
watchOS 6.1.3 can be downloaded for free through the dedicated Apple Watch app on the iPhone by going to General > Software Update.
Apple also released watchOS 5.3.5 (16U652) for those who’s iPhones cannot uodate to ios 13. watchOS 5.35 can be updated via the dedicated Apple Watch app on the iPhone by going to General > Software Update.
We are updating this article.