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So many threads about this over the past year and half but I think it's worth repeating.

The Masimo patents that the ITC said Apple infringed were not granted until after the Apple Watch gained blood oxygen monitoring. The reason Masimo has prior patent rights is nuanced but essentially has to do with some earlier patents that date from around 2008 but did not cover the Apple Watch. At trial all but one juror found in favor of Apple, and there was a mistrial. Apple is appealing the ITC decision so we need to see how that goes but if Masimo has anything on Apple Watch patent-wise it is paper thin IMHO.

In any event, Apple says that they got permission to do this from Customs, which enforces the ban. So it would seem that Apple is not infringing the Masimo patents with this update. Waiting to hear what Masimo has to say about all of this.
I’m not sure what Massimo can say or do about it. The patents were related to how the data is processed on the watch. With this alternative the data the watch gathers is processed on the iPhone.
 
Just updated my Apple Watch 10 (GPS+Cellular) to watchOS 11.6.1, and the Blood Oxygen app is still missing from my Apple Watch. iPhone 16 Pro Max was updated to iOS 18.6.1. Does anybody else have this issue, too? Thanks!
I actually discovered what it was. The app had been removed. I went to the App Store on the Apple Watch and reinstalled it. It is working now, albeit with results only on the iPhone. Thanks!
 
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Anybody in Europe, but with a US based account, finding the update removes on device display of blood ox reading?
 
Interesting that the patent prevents the data from going back to the Watch to display the results. Of course, I'm not an IP expert so maybe this isn't interesting for the experts.
 
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So is this only an "at will" measurement, or does it do blood oxygen tracking during sleep? How did it work before? I came from Garmin to AWU2 and Garmin has a setting to either do it throughout the day or only during sleep (throughout the day option drained battery a good amount so I had it set to the 'only during sleep' option.)
How has Apple Watch handled this?
 
I can download it to my Ultra 1, which is strange as I still have the original feature. I thought the update was only for AW 9, 10 and Ultra 2?
 
This is so depressing to see said out loud.

Apple used IP they had no right to and you're happy about Apple "out maneuvering" the IP rights holder?
They didn't "use" anybody's anything. They made a product that they had every right to make, and a patent troll with too good of a patent manipulated the court system to block Apple temporarily. They accomplished nothing, and lost a ton of money in the process.
 
I’m not sure what Massimo can say or do about it. The patents were related to how the data is processed on the watch. With this alternative the data the watch gathers is processed on the iPhone.
There is probably not much they can do, which is why I’m interested in hearing their response to this. I would be surprised if they say nothing, although they are waiting for the appeal to be decided too.
 
S10 and 14Pro. I installed the update on both devices. Launched the App on the watch, it took the reading and directed me to phone to see the results. Results are in the Health app on the phone.

While not the way it was when I had my pre-ban S7, I'm satisfied.
So, this won't come back to the S7? I had my S7 battery replaced a couple months ago and they swapped it out for a whole new watch that had the blood oxygen disabled now. Why can't they add it back to S7 as well?
 
More than a few people above said they haven't been able to measure O2 after installing the updates on their Watch & iPhone.

If that's you, take a look at Apple's newly updated instructions / support page:

 
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So, this won't come back to the S7? I had my S7 battery replaced a couple months ago and they swapped it out for a whole new watch that had the blood oxygen disabled now. Why can't they add it back to S7 as well?
I meant this new behavior is different than how my S7 operated, prior to the ban.
 
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I'm in the US with an AW10 I bought in Canada in February. O2 has worked on the watch all along. I'm wondering if this update will affect me being able to view the results on the watch.
 
So is this only an "at will" measurement, or does it do blood oxygen tracking during sleep? How did it work before? I came from Garmin to AWU2 and Garmin has a setting to either do it throughout the day or only during sleep (throughout the day option drained battery a good amount so I had it set to the 'only during sleep' option.)
How has Apple Watch handled this?
Based on what I'm seeing it is both on demand and regularly scheduled. I've gotten multiple results on my Ultra 2 since updating and running an initial on demand measurement. There is an option to not have it run while in Sleep or Theater mode (since the light might be annoying in those contexts).
 
Glad I stuck with the Ultra 1, I've had it this whole time. Of course mine was made before January 2024, as noted by the model number ending in LL/A. If your Ultra gen 1 model number ends in LW/A, blood oxygen is not, or has not, been available. The article doesn't mention it but I wonder if they'll push a firmware update to the Gen 1 Ultra LW/A models to get the functionality enabled.
 
I saw a YouTube video saying with this implementation there are no background measurements for O2. Is this true?
 
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