Apple yesterday announced the Apple Watch Series 6 with a new sensor that enables blood oxygen monitoring capabilities, but Apple did not clarify which countries the feature would be available in.
Some health capabilities, like ECG and irregular heart rate notifications, have been limited in availability because of regulatory requirements, but it appears that those requirements don't apply to the blood oxygen monitoring feature.
According to the Apple Watch Feature Availability page, blood oxygen monitoring is available in more than 100 countries, suggesting there are no health-related regulatory issues that Apple has to overcome. A support document on using blood oxygen monitoring does mention that it's only available in "certain countries and regions," however, so there may be some omissions.
Those who are interested in purchasing an Apple Watch Series 6 specifically for the feature should double check the availability page to make sure blood oxygen monitoring is supported in their country.
Measuring blood oxygen with the Apple Watch Series 6 is done through the new Blood Oxygen app. It uses a series of red and green LEDs and infrared light to measure the amount of light reflected by the skin, with advanced algorithms using this data to calculate the color of the blood to derive the blood oxygen level. Bright red blood has more oxygen, while darker red blood has less.
The Apple Watch Series 6 is available for purchase from Apple's online store, with orders set to arrive starting this Friday.
Wednesday January 14, 2026 10:18 am PST by Joe Rossignol
Verizon is experiencing a major outage across the U.S. today, with hundreds of thousands of customers reporting issues with the network on the website Downdetector. There are also complaints across Reddit and other social media platforms.
iPhone users and others with Verizon service are generally unable to make phone calls, send text messages, or use data over 5G or LTE due to the outage....
Wednesday January 14, 2026 7:09 am PST by Joe Rossignol
While the iPhone 18 Pro models are still around eight months away, a leaker has shared some alleged details about the devices.
In a post on Chinese social media platform Weibo this week, the account Digital Chat Station said the iPhone 18 Pro and iPhone 18 Pro Max will have the same 6.3-inch and 6.9-inch display sizes as the iPhone 17 Pro and iPhone 17 Pro Max.
Consistent with previous...
Thursday January 15, 2026 10:56 am PST by Joe Rossignol
While the iPhone 18 Pro and iPhone 18 Pro Max are not expected to launch for another eight months, there are already plenty of rumors about the devices.
Below, we have recapped 12 features rumored for the iPhone 18 Pro models, as of January 2026:
The same overall design is expected, with 6.3-inch and 6.9-inch display sizes, and a "plateau" housing three rear cameras
Under-screen Face ID...
Thursday January 15, 2026 11:19 am PST by Joe Rossignol
Apple today updated its trade-in values for select iPhone, iPad, Mac, and Apple Watch models. Trade-ins can be completed on Apple's website, or at an Apple Store.
The charts below provide an overview of Apple's current and previous trade-in values in the United States, according to the company's website. Most of the values declined slightly, but some of the Mac values increased.
iPhone
...
Tuesday January 13, 2026 7:52 pm PST by Joe Rossignol
Apple and Google this week announced that Gemini will help power a more personalized Siri, and The Information has provided more details.
Subscribe to the MacRumors YouTube channel for more videos.
As soon as this spring, the report said the revamped version of Siri will be able to…
Answer more factual/world knowledge questions in a conversational manner
Tell more stories
Provide...
Pulse oximetry is quite a simple and well established technology (>40 years) so there is absolutely no reason it won't be as accurate as the ones we use in hospital.
It will also be just as temperamental as the red (and infrared) LED is much more prone to interference. It's the reason why they will continue to use the green LED for plain pulse tracking - much more accurate & less susceptible to interference - particularly with exercise or any movement really.
So it will be: - Green LED -> Exercising pulse rate* - Red & Infrared -> Pulse Oximetry, foreground & background (+/- green LED to help lock onto the pulse rate**) - Infrared -> background pulse rate reading when not moving*
* Just like all Apple Watches since day one. ** This is where Apple might be able to improve on existing tech
EDIT: My money is on Apple introducing a Sleep Apnoea detection function next. The pieces of the puzzle are all there already: - pulse oximetry - movement detection - noise detection
Yes, I made this point here in another thread yesterday. 'Blood Oxygen Levels' does not equate to 'Pulse Oximetry'.
But even my colleague there simplifies it somewhat...
You can be hypoxic even if your pulse oximetry is normal and your Hb levels are normal.
How? If a large proportion of your Hb is in a form that can't carry oxygen (eg. from carbon monoxide poisoning). However, if you ran a sample of the same blood through a laboratory *co-oximeter* it would show that your true saturations are in fact low.
Pulse oximeters measure functional oxygen saturation, ie. what percentage of Hb that can carry oxygen (ie functional Hb), is carrying oxygen. Even hospital pulse oximeters are limited in this way.
Laboratory co-oximeters measure fractional saturation, ie. what percentage of all Hb is carrying oxygen.
In short, if your Hb is normal (ie. you're not anaemic) and there is no chance there is a lot of abnormal Hb floating around (Met-Hb, Carboxy-Hb) then pulse oximetry is a good indicator of 'oxygen levels'.
None of this really matters to the user, but they really should rename 'Blood Oxygen Levels' to 'Pulse Oximetry'. It's correctly named in the 'Health' app.
If you were significantly anaemic you'd also have an abnormally increased heart rate so perhaps the Watch might pick up on that? I just feel sorry for all my US friends that have to pay lots of money to see a General Practitioner. We pay almost nothing here in Australia (but we do pay - happily - more tax for that benefit).
It sure would be nice to find info on its stated accuracy range to see how it compares to the fingertip meter I have. The caveats about 'not for medical diagnostic purposes' are understandable, but whats the real world potential look like? I'm thinking this will be a popular use case these days.
I’m sure there will be comparisons from the usual clickbait tech tubers on day one. Looking forward to a thumbnail with some guy with a screwed up expression on his face and doing some weird pose with his hands ?
Anyway, it’s great this feature doesn’t have to go through regulatory approvals. But Apple talks about blood oxygen levels, not O2 sat. There (can be) a big difference.
In Germany there‘s a disclaimer in every series 6 promo picture stating that blood oxygen measurement is “not for medical use, not even for self-diagnosis or consulting a doctor, and is only suitable for fitness and wellness purposes”.
This last part was also stated by the MD announcing the feature in the keynote, so I guess that’s how they get around regulation.
