Apple announced yesterday the Apple Watch Series 6 with a new sensor that allows you to monitor oxygen in the blood, but Apple did not clarify in which countries the feature would be available.
Some health capabilities, such as ECG and irregular heart rate notifications, have been limited in availability due to regulatory requirements, but it appears that these requirements do not apply to the blood oxygen monitoring function.
According to the Apple Watch Feature Availability page, blood oxygen control is available in more than 100 countries, suggesting that there are no health-related regulatory issues that Apple has to overcome. A supporting paper on the use of blood oxygen monitoring mentions that it is only available in “certain countries and regions,” so there may be some omissions.
Those interested in purchasing an Apple Watch Series 6 specifically for the feature should check the availability page to make sure blood oxygen monitoring is supported in their country.
Blood oxygen measurement with the Apple Watch Series 6 is done using the new blood oxygen application. It uses a series of red and green LEDs and infrared light to measure the amount of light reflected by the skin, with advanced algorithms that use this data to calculate blood color to get the level of oxygen in the blood. Bright red blood has more oxygen, while darker red blood has less.
The Apple Watch Series 6 is available for purchase in the Apple Online Store.