Apple Releases watchOS 6.1.3 Update With Heart Rhythm Notification Bug Fix - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

Apple Releases watchOS 6.1.3 Update With Heart Rhythm Notification Bug Fix

Apple today released watchOS 6.1.3, the fifth update to the watchOS 6 operating system designed to run on modern Apple Watch models. watchOS 6.1.3 comes three weeks after the release of watchOS 6.1.2.

watchOS 6.1.3 can be downloaded for free through the dedicated Apple Watch app on the iPhone by going to General > Software Update.

watchos6ewatchfaces
To install the new software, the Apple Watch needs to have at least 50 percent battery, it needs to be placed on a charger, and it needs to be in range of the iPhone.

The watchOS 6.1.3 update includes important bug fixes, addressing an issue that could prevent the irregular heart rhythm notification feature from working properly for Apple Watch owners in Iceland.

Apple has also released watchOS 5.3.5 for Apple Watch models not able to run watchOS 6 due to the use of an older iPhone.

Related Roundup: Apple Watch 11

Popular Stories

apple world surf league video

Apple Shares Video on How Pro Surfers Use Apple Watch During Competition

Tuesday June 23, 2026 9:57 am PDT by
Apple today shared a video showing off the Apple Watch in use at the World Surf League Championship Tour, with surfers describing how they use the watch when competing. Surfers can be hundreds of meters away from the beach during competitions and can't hear announcements over the sound of the water and the wind. The World Surf League has adopted the Apple Watch to solve the problem, linking...
series 10 apple watch titanium digital crown

Report: Apple Watch Redesign Coming Next Year With New Band System

Tuesday June 30, 2026 8:45 am PDT by
A "major overhaul" of the Apple Watch's design is due to arrive next year with a new system for connecting bands, according to a known Weibo leaker. In a set of recent posts, the leaker known as "Instant Digital" linked the new claim to older rumors about an "Apple Watch X" model, which was said to introduce a fresh design and break compatibility with the existing watch band system. Citing...
3 4 24 Sport Band Refresh Feature

Sketchy Rumor Claims Apple Watch Series 12 Could Introduce Sensor in Band

Friday July 3, 2026 8:54 am PDT by
The Apple Watch Series 12 could ship with a new health sensor built directly into one of its bands, according to a sketchy rumor from a known leaker. The leaker known as "Kosutami" says the sensor will be injection-molded into a silicone band, and only a silicone band, apparently because Apple has not yet solved how to embed similar hardware in bands made from other materials. No detail was...

Top Rated Comments

thadoggfather Avatar
84 months ago


The watchOS 6.1.3 update includes important bug fixes, addressing an issue that could prevent the irregular heart rhythm notification feature from working properly for Apple Watch owners in Iceland.

Strangely specific geographical bug
Score: 17 Votes (Like | Disagree)
84 months ago
Acknowledgement Apple has Icelandic users - wow! Now if only they would give us Apple Music, iTunes Store, Apple TV+, Books, iCloud Music Library, Movie Rentals, iTunes Match and every other feature everyone else seems to have 🤔
Score: 13 Votes (Like | Disagree)
Hodar1 Avatar
84 months ago
My cellular plan has "unlimited Data", and as these iOS updates are not horrendously large - I wish we could opt out of the manditory Wi-Fi download requirement.
Score: 10 Votes (Like | Disagree)
84 months ago
I'm still pining for custom watch faces. So exasperating - why can't we have that?
Score: 10 Votes (Like | Disagree)
Toratek Avatar
84 months ago
So.... an update for Bjork?
Score: 10 Votes (Like | Disagree)
Expos of 1969 Avatar
84 months ago

ummm, where did you get that? I responded that you can opt out of automatic updates on both Apple Watch and iPhone. quotes from the posts: " I wish we could opt out" and "You cannot even opt out when updating your phone". So yah, you can opt out, pretty easily.

Update using only your mobile data? I have never even tried, so while I would assume so, I have no idea. I don't have unlimited on my mobile, so I use wifi for all updates.

oops, my bad. Now I see what you said. Never mind!
Never mind?? Perhaps an apology for you saying "Do you really know what you are talking about?" is in order?
Score: 8 Votes (Like | Disagree)