The Ultrahuman Ring Air is one of the lightest smart rings you can wear, weighing from 2.4 grams depending on size and skipping the monthly subscription that some competitors charge. It tracks circadian rhythm, recovery, and a set of metabolic-health metrics through a free base app, with optional paid add-ons for those who want more. On paper, it is a strong pick for anyone who wants detailed health data without an ongoing fee.
The catch is availability. A 2025 US trade ruling now restricts importing and selling infringing Ultrahuman rings in the United States, and unlike a key rival, Ultrahuman did not announce a settlement. Short verdict: a featherlight, subscription-free ring with a deep health focus that is easy to recommend to buyers outside the United States, but genuinely hard to buy through normal channels for US shoppers right now.
Important: US availability
This is the single most important thing to understand before you consider the Ring Air in the United States. In 2025, the US International Trade Commission issued an exclusion order, effective October 21, 2025, after Ultrahuman was found to infringe an Oura patent. That order blocks infringing Ultrahuman rings from being imported into and sold in the United States.
Some companies respond to a ruling like this by reaching a settlement that lets them keep selling, often after a redesign or a licensing arrangement. RingConn, for example, took that route. Ultrahuman did not announce a settlement. As a result, the Ring Air is currently difficult to buy through normal US retail channels, and availability there cannot be assumed.
Ultrahuman’s route back into the United States is a different product: the redesigned Ring PRO, which it opened for US pre-orders on March 24, 2026 after clearance from U.S. Customs and Border Protection. On Ultrahuman’s US store the Ring PRO costs $479, and it is not the same ring as the Ring Air reviewed here. If you are shopping from the United States, confirm exactly what you are buying and whether it can ship to you before you pay. Buyers outside the United States are generally unaffected by this order and can purchase as usual.
If US availability matters most to you, it is worth comparing alternatives. See our guide to the best smart ring and our roundup of subscription-free smart rings for options that may be easier to obtain.
Specifications
| Spec | Detail |
|---|---|
| Price | About $349 |
| Subscription | None for the base app; optional paid PowerPlugs add-ons |
| Battery | 4 to 6 days |
| Weight | 2.4 to 3.6 grams, depending on size |
| Compatibility | iOS and Android |
Design: the lightest ring
Weight is where the Ring Air earns its name. Starting at 2.4 grams in the smallest sizes, it is one of the lightest smart rings available. That matters for a device meant to be worn around the clock, including during sleep.
The interior surface is flat, without the raised sensor bumps found on some rings. A flat inner ring tends to feel more uniform against the finger and avoids the localized pressure points that bumpy interiors can create over a long day. For sleep tracking in particular, comfort is not a minor detail. A ring you take off because it bothers you stops collecting the data you bought it for.
What it tracks
The Ring Air leans into health metrics rather than treating itself as a basic step counter. Circadian rhythm is a central theme, with the app oriented around aligning your sleep and activity with your body’s natural timing.
Beyond sleep, Ultrahuman highlights a metric it calls Cardio Adaptability, intended to reflect how well your cardiovascular system responds and adjusts. It is sold as an optional paid PowerPlug rather than included in the base app. The ring also offers dynamic recovery tracking, which adapts to your current state rather than treating recovery as a fixed daily score. Tying these together is a broader metabolic-health ecosystem, reflecting Ultrahuman’s wider interest in how factors like glucose and metabolism connect to everyday wellness.
If you are weighing this feature set against the most established name in the category, our Oura vs Ultrahuman comparison breaks down how the two approaches differ.
Subscription-free, with optional add-ons
One of the Ring Air’s clearest selling points is its pricing model. The base app is subscription-free. After you buy the ring, you can use its core tracking without paying a recurring monthly fee, which stands in contrast to some competing rings that gate their full feature set behind an ongoing subscription.
Ultrahuman does offer optional paid add-ons called PowerPlugs. These are extra modules you can choose to buy if a specific feature appeals to you. One example is Cycle & Ovulation Pro, listed at $3.99 per month on Ultrahuman’s US PowerPlugs page, while the basic Cycle & Ovulation PowerPlug is free. The key point is that these are optional. You are not required to subscribe to get the ring’s main value, and you can decide module by module whether any add-on is worth it to you.
Pros and cons
Pros
- Extremely light, from 2.4 grams, among the lightest smart rings available
- Flat interior surface for comfortable all-day and overnight wear
- No subscription required for the base app
- Strong health focus, including circadian rhythm, dynamic recovery and an optional Cardio Adaptability add-on
- Works with both iOS and Android
- Battery life of up to 6 days
Cons
- Restricted US availability after the 2025 ITC exclusion order, with no announced settlement, making it hard to buy through normal US channels
- In the US, Ultrahuman sells the redesigned Ring PRO instead, a different ring priced at $479
- Some features are split into optional paid PowerPlugs add-ons
- At about $349, it sits in the premium price range
Who should buy it?
Right now, the Ring Air makes the most sense for buyers outside the United States, since the import and sale restriction makes US purchasing difficult. For international shoppers, it is a compelling option if you want a very light ring, all-day comfort, and detailed health tracking without committing to a monthly subscription.
It is a particularly good match if you care about sleep and recovery and want metrics like circadian rhythm and dynamic recovery, or if you are drawn to Ultrahuman’s broader metabolic-health approach. If you are shopping from the United States, treat availability as the deciding factor. Confirm you can actually buy and receive the product before you set your heart on it, and have a backup option in mind.
Frequently asked questions
Can you buy the Ultrahuman Ring in the US?
It is currently difficult. A US ITC exclusion order, effective October 21, 2025, blocks infringing Ultrahuman rings from being imported into and sold in the United States after Ultrahuman was found to infringe an Oura patent. Unlike RingConn, Ultrahuman did not announce a settlement, so the ring is hard to buy through normal US channels. Ultrahuman now sells the redesigned Ring PRO in the United States instead, so confirm exactly what is available to you before buying.
Does the Ultrahuman Ring Air require a subscription?
No. The base app is subscription-free, so you can use the ring’s core tracking after purchase without a recurring monthly fee. Ultrahuman does sell optional paid PowerPlugs add-ons, such as Cycle & Ovulation Pro at $3.99 per month, but these are optional extras rather than a required subscription.
How long does the battery last?
Ultrahuman rates battery life at 4 to 6 days on a charge. Actual results vary with usage and the features you enable.
Verdict
The Ultrahuman Ring Air is a genuinely appealing smart ring on its merits. It is one of the lightest rings available, from 2.4 grams, and its flat interior surface makes it comfortable. It lasts up to 6 days per charge and delivers a deep, health-focused feature set without forcing you into a monthly subscription. For buyers outside the United States, it is easy to recommend at around $349.
The serious reservation is US availability. With the 2025 ITC exclusion order in effect and no announced settlement, US shoppers may simply be unable to buy it through normal channels, and that practical reality outweighs the spec sheet for anyone in that market. If you can buy it where you live, it is a strong choice. If you are in the United States, check availability first and keep an alternative ready.
Last updated: September 2026. Prices and specifications change over time, so check the retailer for current details. Kracked is editorially independent and not affiliated with the brands mentioned. The wellness features described here cannot provide a medical diagnosis; consult a healthcare professional for medical concerns.
Editor’s note: This article first appeared on Recentic, our sister site. Correction, September 2026: an earlier version said the Ring Air weighs 2.4 grams and lasts about six days on a charge (Ultrahuman lists 2.4 to 3.6 grams and four to six days), described the Ring PRO as the US name for the Ring Air, and listed Cardio Adaptability as free.
Last fact-checked: 30 September 2026