ULTRAHUMAN Ring AIR Sizing Kit | Choose from Sizes 5-14 | Sizing Guide for Your Smart Wearable Ring

best investment of 2025! looks and feels amazing on, very functional - you can track so much on it in real time. especially good if you struggle with sleep as it gives you detailed insights. i managed to get it on a black friday deal (£232) so the value for money was amazing! only con of this ring is that it does scratch easily but this can be mitigated by getting a cover for it.

I am happy with the functionality of this ring. The stats mirror fairly closely to my Apple Watch in terms of sleep. Steps are not at all accurate though. The app provides lots of information, which I love, although it could be overwhelming for some. That said, it breaks it down well and gives some well presented information The ring is well made and solid, and looks good. So far I am very happy with the product.

Battery life is very convenient and lasts a few days before needing charging. Tracks sleep very well and provides useful information and ways to improve. Would definitely recommend

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.

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

I’ve been using the Ultrahuman Ring for a few weeks now, and it has made a real difference to my daily routine. I love how accurately it tracks my activity and sleep, and the insights have helped me improve my focus and rest. It is incredibly durable, even through intense gym sessions and weight training and comfortable to wear, reliable, and definitely motivates me to stay consistent with my health goals.

I have been using the ring for a couple of weeks now and it has exceeded my expectations. It has so many extra features I didn even know about and the caffeine window is so helpful. I love the fact that based on the day before, it will make suggestions for the next day on sleep, exercise etc. Can highly recommend 😀

手首にウェアラブルバンドを使ってたのですが、寝てる時につけているのが嫌だったので、スマートリングにしました、軽くて付け心地もよく、今のところは気にいってます。 スマートリングのブランドとしては、海外ではそれなりに人気があるようですね。 アプリの表示項目は多くて、よくある活動量以外に回復や睡眠は細かいデータが表示されます。 睡眠改善が目的で購入したのですが、朝に振り返ると、前日の活動量や飲酒、寝た時間の影響など良かったり悪かった気付きがあります。 またPowerplugsといわれる追加機能で、睡眠に関連するようなカフェイン摂取の推奨時間帯がみれたり、日光浴の時間記録、スマホのスクリーンタイムの可視化、体内時計のリズムなどいろいろな機能があり、まだ上手く使いこなせてないですが、睡眠の質向上に活かせたらなと思ってます。 バッテリーは3日前後といった感じです、追加機能をオンにしてたり、アプリもよく見るほうだと思うので、仕事中に座ってるときに2、3日に1回充電してます。 リングの中には安いのもいろいろあるようですが、データが数値やグラフで細かく表示され、追加機能もありお値段するだけの高機能なリングだなと思ってます。月額料金がかからないのもいいですね。 睡眠改善と、回復も意識して使い続けたいなと思います。

llevo usándolo 3 meses y es parte de mi rutina diaria. La batería dura mucho y las métricas son parecidas a law del Apple Watch así que ya no dependo del reloj tanto. Y estéticamente es guapisimo

Feels more comfortable than the sizing kit, smoother and more comfortable. compliments my stainless steel watch cases, and is pretty accurate so far.

Ottimo è perfetto per misurare le dita prima di comprare qualsiasi anelli .

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