Update includes bug fixes and improvements.
Apple released the latest update to watchOS today — version 6.1.3. According to the update notes, this version includes improvements and bug fixes for an issue that prevented the irregular heart rhythm notification from working as expected for Apple Watch owners in Iceland.
Some features may not be available for all countries or all areas. For more information visit, https://www.apple.com/watchos/feature-availability.
For information on the security content of this update, visit support.apple.com/HT201222