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Successor to the Watch Series 7 (review), the Apple Watch Series 8 is an incremental upgrade with temperature sensor among the notable additions. There are actually two temperature sensors; one placed under the screen and another on the bottom alongside other sensors. These sensors are not available on-demand, but work in the background while you sleep to calculate the baseline (first five nights) and thereafter measure the variations in body temperature.
A temperature-sensing wearable tied onto your wrist is a novel idea, but its utility is limited to women’s health in the Apple Watch Series 8. That said, the Watch Series 8 enables users to receive retrospective ovulation estimates in the Health app available on iPhones. For the uninitiated, knowing when ovulation has occurred can be helpful for family planning.
