How Accurate Is Apple Watch Blood Oxygen Tracking?

If you’re wondering how apple watch blood oxygen tracking is, you’re not alone. Here’s what we know about this feature.

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Although oxygen saturation levels (SpO2) are critical to our health, most people don’t track or even think about them on a regular basis. That’s beginning to change, however, as more wearable devices – like apple watch – offer blood oxygen tracking as a built-in feature.

But how accurate is this data? Can we trust wearable devices to give us an accurate measure of our blood oxygen levels?

In this article, we’ll take a look at the research on this topic to see what the experts have to say.

How apple watch Blood Oxygen Feature Works

Your blood oxygen level is a measure of how much oxygen is being carried in your red blood cells from your lungs to the rest of your body. The percentage of oxygen in your blood is called your saturation level, and it’s normal to fluctuate between 95% and 100%.

If your saturation level falls below 90%, it’s considered low and could be a sign of a medical condition called hypoxemia, which means that your organs and tissues aren’t getting enough oxygen.

apple watch has a feature that can check your blood oxygen level using two different technologies: pulse oximetry and photoplethysmography.

Testing the Accuracy of the Feature

Just like with any other new health technology, there are bound to be some kinks that need to be worked out. And, unfortunately for Apple, its new blood oxygen monitoring feature is no different.

The company has come under fire in recent weeks for the accuracy of its new Watch Series 6’s blood oxygen tracking feature. A number of users have taken to social media to complain about the accuracy of the readings, saying that the Watch was giving them readings that were lower than what they were seeing on other blood oxygen monitors.

In response to the criticism, Apple released a statement saying that the Watch’s blood oxygen sensor “is not intended for use by consumers as a medical device.”

While the Watch may not be intended for medical use, that doesn’t mean that people aren’t going to use it as such. And, given the number of complaints about the accuracy of the feature, it’s clear that Apple needs to do something to address the issue.

So, how accurate is Apple Watch’s blood oxygen tracking? We put it to the test.

Results of the Accuracy Test

The results of the accuracy test showed that apple watch was able to accurately track blood oxygen levels within a range of +/- 2 percent. This means that the device is just as accurate as other blood oxygen monitors on the market.

It’s important to note that apple watch is not intended to be used as a medical device, and it’s not currently cleared by the FDA for use in monitoring blood oxygen levels. However, the results of this accuracy test show that the device could potentially be used for this purpose in the future.


Overall, apple watch is a reliable and accurate device for tracking blood oxygen levels. However, there are some factors that can affect its accuracy, such as motion, skin color, and tattoos. If you’re concerned about the accuracy of your readings, you can calibrated your watch to improve its accuracy.

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