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How do you Measure oxygen level in sleep?

Will Apple Watch Series 7 measure & report periodic oxygen levels while sleeping? It does during the day

Apple Watch Series 7

Posted on Nov 6, 2021 12:08 PM

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6 replies

Nov 14, 2021 4:58 PM in response to drbobdr

Hello drbobdr,


Thanks for getting back to us with those additional details. It looks like you're still unable to measure blood oxygen during sleep. We'd be happy to look into this with you.


Which iPhone model, and iOS version are you using with your Apple Watch? Settings > General > about.


"About background measurements

The Blood Oxygen app on your Apple Watch will occasionally measure your blood oxygen levels if background measurements are on. This will usually happen when you are not moving. Depending on how active you are, the number of readings collected each day and the time between these readings will vary. Blood oxygen measurements use a bright red light that shines against your wrist, so it may be more visible in dark environments. If you find the light distracting, you can turn off background measurements.

  1. Open the Settings app on your Apple Watch.
  2. Tap Blood Oxygen, then turn off In Sleep Focus and In Theater Mode.

Blood oxygen measurements only occur during sleep if the Track Sleep with Apple Watch setting is turned on."


How to use the Blood Oxygen app on Apple Watch Series 6 or Series 7


We hope this information is useful. Kind regards.

Nov 7, 2021 11:26 AM in response to drbobdr

Hello drbobdr and welcome to Apple Support Communities. It appears you have a concern about blood oxygen readings on an Apple Watch.


How to use the Blood Oxygen app on Apple Watch Series 6 or Series 7


Note this passage near the end of that article:


"Blood oxygen measurements only occur during sleep if the Track Sleep with Apple Watch setting is turned on."


Cheers.

Nov 25, 2021 7:19 PM in response to drbobdr

Hello drbobdr,


Thanks for following up with us. Being able to measure blood oxygen during sleep is super important, and we'd be happy to provide some guidance.


Next, let's restart both your iPhone, and Apple Watch, and test again. Here's how:


Restart your iPhone

Restart your Apple Watch


If the issue persists, please get in touch with Apple Support. You can reach out to them here: Get Support


Thank you for using Apple Support Communities. Have a nice day.

How do you Measure oxygen level in sleep?

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