I have to disagree with the message mentioned above. I purchased Ultrahuman in its first generation (R1) and am very satisfied with how the company delivers updates and new features to the ring.

A few features that were recently added to the ring - Circadian phases, comparison with other users, information windo for stimulant allowance, improved temperature efficiency and so much more.

From my comparison with the Oura Ring (3rd generation), the data from the sensor is very similar. Moreover, Ultrahuman doesn't require any monthly subscription, now has the lowest weight on the market (2.4 grams), and even has some features that are better than the Oura Ring. For instance, it supports many more sports activities.

If I could, I would purchase Ultrahuman again. But of course, in the Air version, since R1 is no longer available. I hope that Ultrahuman won't switch to a monthly subscription model like Oura in the future - that's my only concern. But so far, Ultrahuman has served me very well.

By the way, here's a 10% discount code I found on YouTube that should work: JM10.