This is a crazy year to be writing about smart rings. Normally, we call rings in, test them, and write about them. But Finnish ring manufacturer Oura has jumped so far ahead of the pack that it’s scarcely fair to put them in the same category anymore. Last year’s Oura Ring 4 was such an unmitigated success that out of 5.5 million Oura rings sold since its inception in 2013, nearly half of them were sold in the past year. They are popular purchases, and surely will be among the top sellers during Amazon’s Big Deal Days. (Check out more of the Absolute Best Prime Day Deals for October 2025 and bookmark our Prime Day liveblog, where we’re tracking deals and trends all event long.)

Last week, Oura debuted an all-new ceramic collection with multi-ring support, and a travel charging case, so you can swap your health-tracking rings in and out with your outfits.

On another note, the company is also enterprise partners with the Department of Defense. It announced plans for a new facility in Texas and prompted CEO Tom Hale to emphasized that Palantir does not have access to your health data. The company also successfully banned its competitors, Ultrahuman and Ringconn. The US International Trade Commission ruled in Oura’s favor in a patent infringement case, and you will no longer be able to buy Ultrahuman or Ringconn rings starting on October 21. (Ultrahuman is countersuing.)

All that is to say, if you want a smart ring and don’t want a monthly charge for a subscription, now is the time to buy an Ultrahuman Ring Air. It is also now $50 off. Ultrahuman has assured its customers that services will continue uninterrupted after October 21, which includes subscription-free features and full warranty support. You just … won’t be able to buy it anymore.

Reviewer Simon Hill tested the Ultrahuman Ring Air back in 2023. Technically, it’s very similar—it tracks your sleep, recovery, and movement. But unlike pretty much any other fitness tracker we’ve tried, the features in the app are subscription-free. I have a Ring Air myself and it’s noticeably lighter than the Oura Ring 4. Ultrahuman has also made some other interesting, if flawed, forays into other products—the Ultrahuman Home monitors air quality, light, and sound. The experience is somewhat flawed and I would rather go with a reliable air quality monitor, but Ultrahuman does not appear to be backing down.

More Fitness Tracker Deals

• Fitbit Inspire 3 for $80 ($20 off): For years, every cheap Amazon brand tried to knock off this tracker. Just get the original.
• Garmin Vivoactive 6 for $250 ($50 off): Garmin has some insanely priced fitness trackers but the Vivoactive 6 is moderately priced, onboard satellite connectivity, and Garmin’s uncannily predictive proprietary algorithms like Morning Report and Body Battery.
• Amazfit Active 2 for $80 ($20 off): Reviewer Simon Hill and I have mixed feelings about Amazfit’s offerings, which tend to have janky software with a ton of upselling. But the Active 2 is gorgeous, has a ton of features, and is under $100? Ridiculous.

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