watchOS 26 Public Beta Launches With Redesigned Blood Oxygen Feature
Apple today released the fourth public beta of watchOS 26, a day after the beta was made available to developers. This particular beta adds support for the redesigned Blood Oxygen feature on the Apple Watch Series 9, Apple Watch Series 10, and Apple Watch Ultra 2 models in the United States.

watchOS 26 public beta 4 can downloaded through the Apple Watch app on the iPhone after you sign up on Apple's beta website.
Blood oxygen sensing has been disabled on Apple's latest U.S. Apple Watch models since January 2024 due to a legal issue, but Apple was able to bring the feature back by tweaking how it works. Apple Watches that previously did not support blood oxygen sensing can once again take readings, but all calculations and results are viewable on the iPhone.
Apple previously reintroduced blood oxygen sensing for iOS 18 and watchOS 11 users, and it was made available for developers with watchOS 26 yesterday.
Apple Watch models sold before January 2024 and outside of the U.S. have always had a functional blood oxygen sensing feature and the original blood oxygen app. Apple Watch Series 9, Series 10, and Ultra 2 users will now need to open the Health app and go to the Respiratory section to view their blood oxygen results.
The watchOS 26 update brings additional features, such Workout Buddy, an Apple Intelligence feature meant to motivate you during your workouts. The Workout app interface has been redesigned, the Smart Stack has more actionable suggestions, the Messages app offer Live Translation and better Smart Replies, and the Phone app features like Call Screening and Hold Assist are available on the watch. Apple also brought the Notes app to the Apple Watch, so you can create notes and view existing notes right from your wrist.
watchOS 26 will launch to the public in the fall.
Popular Stories
Apple is expected to unveil the iPhone 17 series on Tuesday, September 9, and last-minute rumors about the devices continue to surface.
The latest info comes from a leaker known as Majin Bu, who has shared alleged images of Apple's Clear Case for the iPhone 17 Pro and Pro Max, or at least replicas.
Image Credit: @MajinBuOfficial
The images show three alleged changes compared to Apple's iP...
Apple's iPhone 17 Pro and iPhone 17 Pro Max models will feature a number of significant display, thermal, and battery improvements, according to new late-stage rumors.
According to the Weibo leaker known as "Instant Digital," the iPhone 17 Pro models will feature displays with higher brightness, making it more suitable for use in direct sunlight for prolonged periods. The iPhone 16 Pro and...
Apple will launch its new iPhone 17 series this month, and the iPhone 17 Pro models are expected to get a new design for the rear casing and the camera area. But more significant changes to the lineup are not expected until next year, when the iPhone 18 models arrive.
If you're thinking of trading in your iPhone for this year's latest, consider the following features rumored to be coming to...
Just one week before Apple is expected to unveil the iPhone 17 series, an analyst has shared new price estimates for the devices.
Here are J.P. Morgan analyst Samik Chatterjee's price estimates for the iPhone 17 series in the United States, according to 9to5Mac:
Model
Starting Price
Model
Starting Price
Change
iPhone 16
$799
iPhone 17
...
An iPhone 17 announcement is a dead cert for September 2025 – Apple has already sent out invites for an "Awe dropping" event on Tuesday, September 9 at the Apple Park campus in Cupertino, California. The timing follows Apple's trend of introducing new iPhone models annually in the fall.
At the event, Apple is expected to unveil its new-generation iPhone 17, an all-new ultra-thin iPhone 17...
Apple is preparing to release iOS 18.7 for compatible iPhone models, according to evidence of the update in the MacRumors visitor logs.
We expect iOS 18.7 to be released in September, alongside iOS 26. The update will likely include fixes for security vulnerabilities, but little else.
iOS 18.7 will be one of the final updates ever released for the iPhone XS, iPhone XS Max, and iPhone XR,...
A new survey has found that nearly seven in ten iPhone owners in the United States plan to upgrade to an iPhone 17 model, signaling strong demand ahead of Apple's expected unveiling of the devices at its September 9 keynote.
Smartphone price comparison platform SellCell surveyed over 2,000 U.S.-based iPhone users in August to assess upgrade interest and brand loyalty before Apple's event....