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Ultrahuman Ring Air review: Forgettable, in a good way

The Ultrahuman Ring Air is an excellent sleep-tracking companion and among the best smart rings out there, despite some flaws.

CategoryUltrahuman Ring AirDimensions8.1mm wide, 2.45–2.8mm thick, 2.4–3.6g weightMaterialsOutside: Titanium with tungsten carbide carbon coating; Inside: Hypoallergenic epoxy resinWater resistanceWR100ColorsAster Black, Matte Grey, Bionic Gold, Space SilverSizes5–14 (index, middle, or ring finger)ConnectivityBluetooth 5 LE, works with iOS 15+ or Android 6+SensorsInfrared PPG (Red, Green, and IR LEDs for HRM and SpO2), non-contact skin temperature, 6-axis motionBattery24mAh LiPo battery (6 days per charge); 2–3 hours from 0% to 100% charge (Image credit: Michael Hicks / Android Central)I've worn the Ultrahuman Ring Air for the past couple of weeks, and with each passing day, I'm less and less aware of its presence. While Oura and Fitbit demand a monthly fee before unlocking health reports and the most in-depth information on stress, daily readiness, and so on, Ultrahuman makes this data available for "free" after you've bought a ring.

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