Since their introduction a few years ago, smart rings have vowed to rival smartwatches by introducing an increasing number of health and activity-tracking functions. Atrial fibrillation (AFib) can be detected by a few high-end smartwatches, but Ultrahuman's Ring Air is currently the only smart ring available with FDA approval for AFib detection.

Arrhythmia, also known as irregular heart rhythm, is monitored by atrial fibrillation (AFib) and may be a precursor to heart-related health issues. Ultrahuman's new PowerPlugs app service includes an AFib tracking tool.

These cover a wide range of health-tracking choices, such as jet lag, caffeine window, menstrual cycle tracking, and circadian rhythm tracking. In the upcoming years, Ultrahuman further pledges to grow the service to hundreds of apps.

The Ultrahuman Ring Air is a fantastic, discreet health tracker that can monitor vital signs like blood oxygen saturation and heart rate in addition to stress, exercise, and sleep. See our review of the Ultrahuman Ring Air for more information.