The Apple Watch Ultra isn’t just bigger than its non-Ultra counterparts — it also offers a few additional features along with generally more intricate measurements for health tracking, GPS location, and so on. In particular, there’s the Wrist Temperature Tracking option that uses two different temperature monitoring sensors to let you know how warm (or cold) you get while sleeping. The Apple Watch Series 8 and Series 9 also support this feature, but Apple Watch SE users are out
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