You can measure your blood oxygen with the Blood Oxygen app in watchOS 26.4. Let’s look at how to do this.
The Blood Oxygen app on Apple Watch Series 6 or later, and all models of Ultra, can allow you to measure the oxygen level of your blood on-demand. Your blood oxygen level represents the percentage of oxygen your red blood cells carry from your lungs to the rest of your body. Knowing how well your blood performs this vital task can help you understand your overall wellness.
The majority of people have a blood oxygen level of 95 – 100%. However, some people live a normal life with blood oxygen levels below 95%. Slightly lower values while sleeping are expected, and some users might experience values below 95%.
How to take a blood oxygen measurement
You can take a blood oxygen measurement at any time with the Blood Oxygen app.
° Make sure that your Apple Watch is snug but comfortable on your wrist.
° Open the Blood Oxygen app on your Apple Watch.
° Stay still, and make sure your wrist is flat with the Apple Watch facing up.
° Tap Start, then keep your arm steady for 15 seconds.
° Wait. The measurement takes 15 seconds. At the end of the measurement, you will receive the results. For models of Apple Watch purchased in the United States on or after January 18, 2024 with part numbers ending in LW/A, the Blood Oxygen data analysis is performed on iPhone, and results can be viewed in the Health app. This experience is available on the latest version of iOS and watchOS.
° Tap X.
This info is from Apple’s Support webpage.
