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nrau
User level: Level 1 (30 points)

Blood Oxygen reading errors with AW 12

Is anybody else having issues with blood oxygen readings lately? I upgraded from an AW 9 to 12. My 9 never had problems. Every time I manually checked, I always got a reading. Now since I've had the 12, its been so bad. It gives me the "could not be analyzed" message over and over. Finally after 20 times it gives me one. Now when I'm sleeping, it tracks all night, even with me being a restless sleeper, moving alot. And its analyzing lower than usual. Everything is currently updated. Is anybody else getting these inconsistent readings? Just curious to see if this is an issue. Thanks for reading.

Posted on Oct 30, 2026 10:05 AM

3 replies

Carol B.
User level: Level 7 (22,975 points)

Oct 30, 2026 11:21 AM in response to nrau

For what it's worth, I just got my Apple Watch 12 yesterday and set it up. Tried the O2 reading for the first time just now following the guidelines of making sure the band was not too tight or too lose and that my arm was resting comfortably on a table in front of me, the watch successfully took my O2 reading and sent it to my Health app on my iPhone. Then just test it, I checked my O2 with the finger pulse odometer. Both were in agreement.


You may have already done most of this, but it never hurts to review.


Measure blood oxygen levels with the Blood Oxygen app - Apple Support (IN)


Jeff Donald
User level: Level 9 (64,078 points)

Oct 30, 2026 10:08 AM in response to nrau

What country are you in?

nrau Author
User level: Level 1 (30 points)

Oct 30, 2026 10:15 AM in response to Jeff Donald

The US

Originally posted at discussions.apple.com/thread/256385990