ULTRAHUMAN Ring AIR - Aster Black - Size 6 - Smart Ring | No Monthly Subscription | Size First with Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker

Over the years I’ve tried Withings, Fitbit, the Google Pixel Watch, and various cheaper off-brand “smart” watches. While some of them do impressive things, I’ve consistently been disappointed — mainly due to poor battery life, awkward small screens for basic tasks, and constant notifications that become more annoying than useful (assuming the battery hasn’t died first). This time, I wanted something simple and unassuming. Something that tracked my steps, sleep, and fitness metrics properly. No mandatory monthly subscription. No distraction on my wrist. Just useful insight. I’d been looking at smart rings for a while. Oura was the obvious comparison — it looks great — but the ongoing subscription cost and the patent disputes in the US put me off. Then I discovered Ultrahuman. Low barrier to entry The ring sizing kit cost me 10p (or I could have 3D printed one using files from their website). That immediately impressed me. By comparison, Oura charges around £10 for their sizing kit and only refunds it if you go on to buy the ring. Ultrahuman made the entry point incredibly accessible. The reviews were strong, battery life looked reasonable (4–6 days), and the app screenshots looked genuinely useful. Setup & first impressions I purchased the Ring AIR (size 11, brushed titanium) along with the Ultrahuman Ring Voyager charger for faster charging. Everything arrived promptly, and I was set up within minutes. The ring immediately told me it would take around 14 days to fully calibrate to my baseline metrics, but useful data started appearing within the first hour — even in “Chill Mode” (a battery optimisation mode that extends life further). For peace of mind, I also opted for Ultrahuman X (~£50 for 2 years), which covers accidental loss/damage. I know I specifically didn’t want a subscription model, but for an expensive device like this, that felt reasonable and optional. Battery life & comfort The ring is extremely comfortable — I often forget I’m wearing it. Battery life is around 4 days for me, and likely could stretch further. Charging with the Voyager dock is quick and painless — comfortably back to full within two hours. The app experience The app is genuinely impressive — and completely free. There’s a lot of data, which can feel slightly overwhelming at first, but Ultrahuman does an excellent job explaining what each metric means. The longer you use it, the more insightful the reporting becomes (weekly summaries are particularly useful). The app also includes “PowerPlugs” — optional add-ons that extend functionality. Many are free (e.g. Caffeine Window), while some are paid. For example, UltraSync for Tesla provides things like Drive Readiness Score and Drive Stress tracking. I was initially wary that this might be the “hidden subscription model” — but there are far more free PowerPlugs than paid ones, and the core functionality is more than sufficient for most users. It feels optional rather than restrictive, which is the right balance. There are also links within the app to Ultrahuman’s other products (Metabolism, Home, Vision). I was slightly concerned these might feel like constant upsells, but they’re unobtrusive. No annoying ads, no aggressive prompts — and if you owned those products, having everything within one app would actually be preferable to juggling multiple apps. Overall I’m genuinely impressed with the Ultrahuman Ring AIR. It’s comfortable, provides meaningful and well-presented insights, has solid battery life, and - importantly - doesn’t lock core functionality behind a mandatory subscription. It does exactly what I wanted: simple, smart health tracking without the noise. Highly recommended. Five stars from me.

When it worked, it was great, but the battery performance falls off very quickly, and one it does, support is frustrating and tedious. My first one ran fine for about 6 months, and then dropped from 4-5 days of battery life to needing to be charged twice a day in the space of about 6 weeks. The only support was accessible through the app, but insisted on repeated updates of firmware and factory resets with the instruction to "monitor it for 48 hours and come back to us" - this process ran for weeks before I lost my patience and insisted on a replacement. The replacement similarly dropped off in battery performance (and also suffered connection issues, regularly losing all data for several days at a time). Support was once again tedious and frustrating, and an update to the app format has made the support chat less straightforward to access. I'm now told (after multiple factory resets etc) that I'm out of my warranty period, and not elegible for a replacement - despite the app's support tool telling me that I'm eligible for a replacement - although as a goodwill gesture they are prepared to send me a certified refurbished ring. I haven't yet decided whether to accept, as I have already swapped to using an arm-worn tracker instead. The app isn't as slick and the insights aren't as helpful, but at least it stays charged for over a week and retains its connection to the app.

i think the Ring Air is just fabulous. Excellent battery life that easily lasts 5 days. I don't really have to test it because I pop it on the charger when showering and that pretty much keeps it topped up. The Ring Air is very comfortable but I have developed a habit of sliding it half off to check it's positioned correctly and then sliding it back on. I wear mine on the ring finger of my right hand and find it to bee a good fit for me. The Ring Air and its competitors are all thicker than most rings and this can cause discomfort when wearing it on the middle or ring finger because they have fingers on either side. I can see how wearing it on the index finger might be most comfortable but after wearing the sizing kit on this finger for a day, it felt like it was constantly in the way or getting bashed on things. I've had my Astral Black Ring Air now for two months and it has yet to show any signs of wear. Accuracy seems pretty good but I've found the steps under count by about 5% compared to my smartwatch and the SpO2 never seems to go under 99% which for me I know is not right. SpO2 is still a beta feature though so I hope this gets more accurate. Sorry Ultrahuman but you lost a star there. I love the app! It is excellent and provides great detail on your various stats and I like the nudges to remind me about movement and stimulant windows. I know the Oura gets better scores from a lot of people and I ordered both to compare. The Oura was just as comfortable to wear but everything about Ultrahuman's app was so much better and did not require £6 per month to use. I'm very pleased with my decision to go with the Ring Air.

I’ve been using the UltraHuman Ring for a while now and have really enjoyed it, especially for sleep tracking — the data feels detailed, insightful, and genuinely useful for improving my rest. The interface is clean and easy to navigate, and I find myself checking the sleep insights almost every morning. However, the exercise tracking is noticeably inaccurate, and I’ve seen this issue mentioned quite a lot by other users as well. It often underestimates activity, which makes it less reliable for fitness monitoring. This is a pretty big flaw for anyone wanting a well-rounded health tracker, and I really hope UltraHuman prioritizes improving this in future updates. Overall, fantastic for sleep data, but exercise tracking still needs serious refinement, as well as connectivity issues.

I wanted to like the Ultrahuman Air Ring, but my experience over the last 12 months has been extremely disappointing. In total, I have had four rings within a year. Three failed due to battery issues, and the fourth lasted just four weeks before developing Bluetooth connectivity problems, making it unusable. This level of failure suggests a serious reliability and quality control issue. (only three in the photo as the fourth has now gone back to Amazon for a refund. What concerned me almost as much as the hardware failures was how the situation was handled. After the fourth failure, I was offered a second-hand refurbished ring as a “goodwill gesture”, despite the ongoing faults and the product clearly not being of satisfactory durability. This offer was made while my consumer rights were initially ignored. Only after I explicitly stated my UK consumer rights and insisted on a refund did the company eventually concede. While the concept of the ring is excellent and the data is useful when it works, a wearable at this price point should not require multiple replacements in a single year, nor should customers have to argue for basic consumer protections. Based on my experience, I cannot recommend the Ultrahuman Air Ring due to poor durability and an unsatisfactory resolution process when things go wrong. I would also like to THANK Amazon for their levels of service.. they dealt with the refund in less than 2 minutes!!.. Stark contrast to Ultrahuman.. Thank you Amazon... Ian D

Blown away by this, very rare I write a review but I feel this deserved one. Ordered the sizing kit and 2 days later ordered the ring, I ordered size 10 and felt the ring itself was a tiny bit bigger which suited me perfectly. The battery life is amazing, I’m easily seeing 4+ days usage without any charge. Topping it up whilst in the shower keeps it going 24/7 for me personally. The app itself is brilliant and full of information, you can add in features which is great. I use a third party sleep tracker and this matches the ring statistics. I ordered this as I prefer a traditional watch over Smart watches and now I get best of both worlds. The connectivity between the app and ring is seamless, setting it up was extremely easy. Appears to be very durable, no scratches or marks despite some hard work whilst working. The gold colour is beautiful, doesn’t look cheap and looks professional. Great product, highly recommend and the best part? No subscriptions!

Good build and decent insights, although the age indicator is way off the mark and is clearly just based on your actual age +/- 3-4 years. But the main reason for the 2 stars is the battery life, I'm having to charge the ring 2-3 times a day, even on the days where I don't exercise. The ring is already in chill mode, background sync off and it's just dropping from 100 to 30% every 4-5 hours. I've had the ring for just over a year now so I expected some battery degradation, but it's almost at the point where it's unusual now. Maybe that's normal, it's the first smart ring I've ever owned, and obviously the battery is very small but I just expected more for the price point.

The UH Ring Air was a promising concept. I got it so I could get rid of a smartwatch which was too distracting. Ring looks great, robust coating so colour stays good. App was good too with some interesting insights. Data gathered was within accuracy tolerance of smart watch and smart bands. But there is something really off with the build quality of these on the inner side. Ring started to fill tight on finger (and also putting it on and taking it off charging stand). On examination could see that the battery connection has swollen up. That's likely not safe at all. I've seen first hand similar issue with another UH ring (as well as cracking of the inner part of the ring). The ring therefore doesn't last more than around 12 months. That's not good enough and likely dangerous (battery swelling and overheating on a finger could be very painful). All in all, disappointed. Back to using a half smart fitness band, with knowledge it's at least safe.

1ere mise a jours, la bague ne fonctionne plus. Je suis extrêmement déçu. 3 semaines d'utilisation

It works just fine, the customer service is excellent, size fits alright. The pregnancy mode doesn't really do much apart from telling me how far along I am and which stats can be different... and then the app tells me to pay attention to exactly those stats. Okay.

Ich habe den Ring vor etwa zehn Monaten gekauft und war anfangs wirklich begeistert. Solange der Ring funktioniert, ist das Produkt top. Nach ungefähr sechs Monaten begannen allerdings die Probleme. Mittlerweile hält der Akku nur noch einen einzigen Tag – bei einem Produkt in dieser Preisklasse absolut enttäuschend. Noch schlimmer ist jedoch der Support. Seit über einer Woche bekomme ich nur Standardantworten per Mail: „Ein Supportmitarbeiter meldet sich innerhalb von 48–72 Stunden.“ Dann wurde mir zwischenzeitlich sogar ein neuer Ring angeboten, ich habe zugestimmt – und danach begann wieder das gleiche Pingpong von vorne. Man wird ständig vertröstet, niemand fühlt sich verantwortlich und es passiert einfach nichts. Für einen Ring, der fast 400 € gekostet hat, ist das eine absolute Vollkatastrophe. Produkt gut, solange es funktioniert. Service und Support danach leider miserabel.

Cette bague connectee est encore en phase beta et il y a des progres a faire en ce qui concerne l'enregistrement des activites physiques et sportives (actuellement manuel et complique) et la detection du sommeil (siestes suggerees a des moments correspondant en realite a une phase active et heure de lever et coucher incorrectes). Cependant les analyses detaillees des phases de sommeil, du rythme cardiaque, des pas et du stress semblent generalement fiables et permettent un suivi interessant. L'autonomie de la batterie est bonne, a peu pres 4 jours, et elle se recharge rapidement. Le cable du chargeur est plus robuste que beaucoup d'autres et son esthetique merite une etoile a elle seule. La bague elle-meme est sobre, confortable a porter. Dans l'ensemble je recommande, c'est la meilleure des cinq que j'ai essayees et la seule que j'aie gardee.

I changed it 3 time due to hardware issues Couldn’t return it because i took it from Amazon (though the can be refunded from the Ultrahumain) I would advise to buy it directly from thier shop. Difference 200 SAR. But better support and better refund mechanism