Ring is a good fit and able to give feedback that I need. I am using the ring mainly to track my sleep and steps. It is more convenient than a watch which can be bulky. It is also more comfortable to wear this to sleep since it is small. Data seems to be very close to my Garmin watch, so I believe that the data is relatively correct.

[This review was collected as part of a promotion.] I have been using the ring for over 6 months now after deciding to move away from Apple Watch, my 8 years of companion. I think it’s been life changing, especially for sleep tracking and overall wellness with the convenience of wearing nothing. After the patch that I wore experimentally few years back, this is my second product from Ultrahuman and super happy.

[This review was collected as part of a promotion.] Bought this mainly for sleep tracking as hate Apple Watch in bed. The ring is light reliable and get 5-6 battery without worrying about it. On top of that I really like the app and the insight it provides on top of sleep tracking, If your on the fence about purchasing I would go ahead and do it

[This review was collected as part of a promotion.] I've been using my ring for a few months now and I've already recommended it to multiple friends. It has encouraged me to move more, get more steps daily and increase my sun exposure. The period tracking is very reliable as well. The ring has been able to detect trends and sleep patterns that I never would've discovered otherwise which has allowed me to totally change my nighttime routine to improve my sleep. I've been a big fan so far!

[This review was collected as part of a promotion.] I love the constant updates and insights on the app. The only downside is the quick battery life. I change it to chill or critical battery mode when low. I usually keep it on chill for most of the time.

[This review was collected as part of a promotion.] I’ve been wearing the Ultrahuman Ring AIR in gold and it has completely changed the way I understand my body. It gives me incredibly accurate insights into how I sleep, when I need to rest, where I am in my menstrual cycle, and how well I am recovering physically and mentally. The amount of meaningful data this ring delivers is amazing. What really stands out is how clearly it presents everything, helping me make smarter choices about my health, energy, and daily rhythm. It feels like having a personal coach on my finger. The battery does need to be charged fairly often, but I usually do that while I take a shower. It fits easily into my routine and keeps the ring ready throughout the day. I honestly would not want to be without it anymore. If you are serious about understanding your body and making better lifestyle decisions, this ring is a game changer.

[This review was collected as part of a promotion.] Very comfortable to wear, highly recommend using the sizing kit to ensure you get the right size. The app provides A LOT of insights and does a good job of explaining why it’s important to health and wellbeing. I’m 4 months in and still learning and adapting my sleep, caffeine and exercise routine.

[This review was collected as part of a promotion.] I bought my ring approx. 2 months ago. Pros: I really like the design, it's pretty nice and comfy. The user interface is good enough, I can find everything I want easily. The extensions aka. powerplugs are great additions, not to mention most of them are free of charge. My favorite is the circadian rythm tracker, and the smart alarm is also very useful. Built-in breathworks are nice, also free. Exercise tracking is I think as good as you can expect from a ring, plus there are lots of built-in training types. Sleep metrics I cannot compare with other devices or measurements, so I have to rely on what I see in the app, but I feel like they are rather accurate, at least the quantities for sure. Cons: I really wanted to like this ring and I am liking it, but I have to be honest: sadly I'm currently waiting on my third replacement ring. The first stopped charging after a few weeks, the second had a similar problem, but then after a day of trying it did charge up, but then the sleep metrics were gone. The latter was probably a software issue since the metrics during a breathwork session worked, and the sensor diagnosis stated that everything is fine. Regardless of what the actual problem was, it couldn't be used like that. Both lasted for a month, roughly. I only can hope that I will be luckier with the third. If it is really just about luck..

[This review was collected as part of a promotion.] I’ve been using the Ultrahuman Ring AIR for a few weeks now, and I’m genuinely impressed. It’s sleek, lightweight (you forget you’re even wearing it), and packed with features that offer deep insights into both fitness and recovery. What I love: Form Factor: The ring design is a huge win. It's more subtle than a smartwatch and comfortable enough to wear 24/7—even while sleeping or working out. Sleep and Recovery Insights: The recovery score and sleep tracking are incredibly accurate. It not only tells me how long I slept, but how restorative that sleep was, which helps guide how hard I should push myself the next day. Metabolic Health Tracking: Paired with the Ultrahuman app, the AIR ring gives great context around glucose variability and how your body responds to food, movement, and rest—especially if you're also using their M1 glucose monitor. Battery Life: Lasts around 4-6 days on a single charge. The charging case is also very convenient. Could be better: No live heart rate: It tracks HRV and resting heart rate well, but doesn’t give live heart rate data like some fitness trackers. Size availability: Sizing can be a bit tricky, so make sure to try the sizing kit before ordering your actual ring. Still evolving: Some features are still in beta or rolling out slowly. But the updates so far have been meaningful. Final Thoughts: The Ultrahuman Ring AIR feels like the future of health optimization. If you're into biohacking, performance training, or just want to better understand your body’s rhythms, it’s absolutely worth considering. It’s not just about data—it’s about making smarter daily decisions. Highly recommended.

[This review was collected as part of a promotion.] I bought this at the end of 2024 and it is still going strong. Have had a few issues with the battery, but updates usually fix those issues quickly. It’s comfortable and has plenty of useful features.