The Apple Watch Series 7 has a bigger, brighter ... The infrared sensor on the back of the Apple Watch regularly measures heart rate and records its findings in the Health app.
The Apple Watch 7 was released in 2021 with a launch price of $399 / £369 / AU$599 for the 41mm version and $499 / £469 / AU$749 for the Cellular model. Compared to the Series 6, the Apple Watch ...
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