While many smart accessories look good in the gym, they tend to be left at home on evenings out. Ultrahuman’s new Rare Ring changes that — yes, it tracks sleep, heart rate, and other expected functions — but it looks like a stunning, hand-crafted 18K gold, 18K rose gold, or platinum piece of jewelry. Other features include monitoring body temperature, creating a sleep index of duration, restfulness, time in REM, deep and light sleep stages, as well as notifying you when your body needs to recover from stress or high exertion. It’s all covered by a lifetime membership that protects against damage, theft or loss, upgrades, and other options; Ultrahuman.com.
