Blood Oxygen 4+


    • 3.9 • 135 Ratings
    • Free
  • Only on Apple Watch

Apple Watch Screenshots


With the Blood Oxygen app on Apple Watch Series 6 or later*, you can measure the blood oxygen saturation levels directly from your wrist. Using the blood oxygen sensor on Apple Watch, the Blood Oxygen app can help you assess oxygen levels in your blood and get insights into how well your body is absorbing oxygen and overall wellness.


• Allows you to take on-demand blood oxygen measurements.

• Performs periodic background measurements throughout the day and overnight if you wear your Apple Watch to sleep.

• Stores all measurements in the Health app on iPhone, with the ability to filter and view measurements taken while asleep or in a high-elevation environment.

*Blood Oxygen app is not supported by Apple Watch SE.

Ratings and Reviews

3.9 out of 5
135 Ratings

135 Ratings

The Angry Monkey ,

Almost but not quite useful

This app would be great for pilots, but it’s nearly impossible to get a useful reading when I’m flying. It would be nice if it detected I was over a certain altitude (4,000 FT MSL?) and moving over a certain speed (75 knots?) if it would start sampling my blood oxygen more regularly and if it would start notifying me as I get in the lower 90% range to remind me to start supplemental oxygen.

Reads in bed. ,

Needs a low oxy notification!!!!

Major oversight? Why doesn’t this offer a low blood oxygen notification? Like how we get an AFIB or high heart rate notification if we have an Apple Watch? It would really help with COVID patients who are told they don’t need to go to the hospital until they reach a certain threshold.

Hammy_B ,

Nice and Simple

It literally measures your blood oxygen. Nothing more, nothing less. That’s it. That’s the tweet.
btw love the animation.

App Privacy

The developer, Apple, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Health & Fitness
  • Location
  • Identifiers
  • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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