11 July 2022
The much-rumored body temperature sensor is now rumored to arrive with the Apple Watch Series 8. It was originally speculated to debut with the Apple Watch Series 7 but as we all know that did not happen. Ming-Chi Kuo, a well-known market research analyst, says that the Cupertino-based tech giant decided to cancel the feature as its algorithm did not match expectations.
Kuo says the body temperature measurement algorithm failed to qualify before entering the Engineering Validation Testing (EVT) stage last year. It is the stage where hardware features are trialed before moving the design into the production phase. He further adds that there is a possibility that the Apple Watch Series 8 may mark the debut of the body temperature sensor.
(1/3)— 郭明錤 (Ming-Chi Kuo) (@mingchikuo) May 1, 2022
Apple canceled body temperature measurement for Apple Watch 7 because the algorithm failed to qualify before entering EVT stage last year. I believe Apple Watch 8 in 2H22 could take body temperature if the algorithm can meet Apple's high requirements before mass production.
However, the algorithm will still need to fulfill Apple's quality standard requirements. It means if there is another algorithm failure, we will not see the rollout this year either. He has described the challenges as, "The challenge in implementing precise body temperature measurement is that skin temperature quickly varies depending on outside environments. A smartwatch can't support core temperature measurement in terms of hardware, so it needs an excellent algorithm to work together".
He adds that Apple's rival Samsung is also facing the same challenge with its own smartwatches. The upcoming Galaxy Watch 5 has been rumored to offer a body temperature sensor this year. Kuo says he does nee see this happening due to the same algorithm limitations.