It’s unclear at this point what hardware and software will be required for blood oxygen detection and notifications. It’s possible future Apple Watch Series 6 hardware will be required for the new health feature. It could also come to all or newer Apple Watch models with watchOS 7 in the fall. The original Apple Watch hardware is believed to be capable of measuring blood oxygen levels through the built-in heart rate monitor. Apple upgraded the heart rate monitor with Apple Watch Series 4, adding electrocardiogram features, but Apple Watch hasn’t offered blood oxygen measurement features yet.Other hardware and software features have also been leaked, such as details about an upcoming iPad Pro with three cameras and Apple’s Tile-like item trackers, called AirTags.
Apple Watch will add the ability to detect blood oxygen levels for the first time, 9to5Mac has learned based on an exclusive look at iOS 14 code snippets. From the report: Blood oxygen levels between 95 and 100% are considered healthy; blood oxygen levels below 80% may lead to compromised heart and brain functionality. Risk of respiratory or cardiac arrest is common after continued low blood oxygen saturation. To that end, Apple is developing a new health notification based on the vital measurement. When Apple Watch detects low blood oxygen saturation below a certain threshold, a notification will trigger alerting the user similar to current heart rate notifications.