Apple Watch Blood Oxygen Sensor Returns: How to Use It and What It Can Tell You About Your Health The smartwatch's Blood Oxygen app lets you measure the oxygen level of your blood on-demand. It's been ...

Apple was forced to remove the blood oxygen monitoring two years ago amid a patent dispute, but a software update coming later today will revive the feature.

Apple has your health in mind when it comes to the Apple Watch, which is why it added a blood oxygen sensor starting with the Series 6. This technology can tell if you’re getting enough oxygen to your ...