Ultrahuman Ring Air: Following a lawsuit filed by Oura Ring, the Ultrahuman Ring Air has been banned in the US. It wasn’t during my test, after which we awarded it “the best smart ring if you like to exercise.” But if you own the ring or buy it, you can still use it as intended. The company is working on a new design and plans to launch it as soon as possible.
The Ultrahuman Ring Air came out in June 2023. Verizon partnered with it to become the first carrier to sell the smart ring. The Ring of Light, priced at $349, is available for iOS and Android. It uses infrared photoplethysmography, or PPG, sensors to track sleep, recovery, stress levels, caffeine intake, calories burned, steps and reproductive health of those on their period (cycle, ovulation and pregnancy details). There is no additional registration fee to use the Ultrahuman ring, so that is a plus. Unlike the Oura and Evie Ring, the Ultrahuman Ring Air has a more masculine look with a thicker band. So, if you like more jewelry, this might not be the smart ring for you.
I wasn’t a fan of the app layout for this ring because it looks busy, which makes it hard to read. Between the black background of the app and each data marker with a different background color, it is displayed in a way where there is too much information to take in at once. The big data markers are also not always in the same order. For example, in places where I open the application, the valid caffeine window is shown as a line graph at the top, indicating the window that it is okay to drink caffeine.
After that the dynamic recovery data, then sleep and sleep credit, followed by the data in your exposure window as the reverse value, and that’s the first part of the page. Perhaps the application would benefit from a consistent and simple approach if it displayed all this data. A data geek might like this but I thought it could be presented in a more digestible way. I was also reminded that wearables can’t be wrong: When I compared the sleep data to other data signals on all the rings, they were not the same. In some cases, the readings were close and in others they were far out.
One of the features that stood out to me was the ability of this smart ring to record different types of workouts. Unlike other smart rings I’ve tested, the Ultrahuman Ring Air seems to have a better version of fitness tracking but could still use some improvements. I think it could benefit from the automatic detection feature that the Oura Ring has for movement, and it could even take it a step further to be able to accurately detect the type of exercise you’re doing based on your exercise habits. Ultrahuman Ring Air allows you to create locations, which you can share with other ring-owning friends. Places are designed to share your movement stats for the day as a way to connect. If you own an Ultrahuman M1 Live Glucose Monitoring tracker, you can also connect your data to the ring, which can give you more detailed readings.
I mainly used this ring to record some of my strength training workouts. As I said, the Ultrahuman ring has a long list of exercises to choose from to record, from outdoor running, strength training, outdoor walking, indoor activities, cross training, walking, Pilates and much more. The Ultrahuman ring data mainly looks at your heart rate, heart rate detection, calories burned and your heart rate zone (zones 1 to 5). This can be useful in some cases, such as if you are pregnant and want to avoid overexertion or track your training position.
At one point, I wanted to see how rings collect data during runtime. I often use my Apple Watch to record my runs, so I’m familiar with how it calculates distance and pace. I compared the results from the Oura and Ultrahuman Ring Air with my Apple Watch, since the Evie Ring can record any workout in real time. Oura and Ultrahuman Ring Air captured the same data (heart rate, speed, distance), but it was surprising to see that although each wearable provided its own measurements of these relevant features, the Ultrahuman Ring was not very accurate.
For example, the Apple Watch clocked me at 10 minutes, 25 seconds for a 30-minute mile pace, but the Ultrahuman Ring Air clocked it at 17 minutes per mile, which is a big difference and makes me question its accuracy if I were to rely on it as a wearable. While the Oura Ring recorded it as a 10:32 minute/mile pace, which is close to the Apple Watch reading. If you don’t mind that the ring doesn’t capture very accurate data when it’s working and you want a basic reading, you might want to ignore the Ultrahuman Ring Air. However, if you’re training for races and you care about accurate metrics, you’re better off using another type of wearable.
In terms of sleep tracking, I don’t think it captured my readings as accurately as the Oura ring. Similar to Oura, Ultrahuman Ring Air uses its sleep scores. The Ultrahuman Ring seems to provide me with a kinder reading than Oura. With the Oura ring, I can see the difference when I’m not resting well. Besides the ease of recording workouts in real time, I liked that the Ultrahuman ring gives you an easy-to-track caffeine window. I’m sensitive to caffeine and I don’t usually drink a lot of coffee to begin with but I referred to Ultrahuman’s recommendations and tried to stick to the window. I notice when I drink caffeine out the window, it’s harder for me to calm down.
Like the other rings on this list, the Ultrahuman ring went through some updates during testing but I didn’t notice anything significant in the data I received. If you are a fitness enthusiast, you might like the Ultrahuman Ring Air. But before I walk away from the smartwatch, I’d like to see some improvements in a few of its health features.
Evie Ring: I Evie Ring the first smart ring on the market designed for menstruators to help them track their sleep and other aspects of their lives. The ring retails for $269 (the cheapest on this list), is compatible with iOS and Android and comes in three colors: silver, rose gold and gold. No registration is required to use this ring. The design of the ring is also more stylish than the Oura and Ultrahuman rings, but that depends on what you like. The charging case is great because you can take it anywhere, it has up to 10 extra charges before you need a charging cable and it’s a great way to store the ring when it’s not in use. It has a four-day battery life, although I would argue it’s more like three days, similar to other rings.
What sets Evie apart is that it can track menstrual cycles and automatically track your sleep, heart rate, exercise and more. However, unlike Oura or Ultrahuman, where you are given suggestions to improve certain aspects of your life based on the data it collects, Evie seems to be lacking in that department. Although it can record your menstrual symptoms every day, whether you have heavy or light flow, exercise or read sleep data, Evie does not make recommendations based on this information. It works more like a health diary than a usable piece of wearable technology.
I didn’t find that Evie did anything different to make it stand out from the other two rings I tested, even with the various software updates it went through. The app itself is basic and easy to follow but lacking in design. I will give you credit that one of the latest updates includes an AI chatbot, which asks about the health goals you have in mind and offers recommendations based on your answers. I found it more general than I would have liked because the ring is supposed to adapt to your habits based on the data it collects. You can easily lie to a chatbot and this defeats the point of wearing a smart ring that monitors your health habits.
Like other rings, I had to enter Workout after the fact because it only records certain activities. It also tracks how active you are, your steps and the calories you burn throughout the day. This is fine, but I can just wear a smart watch and get the same data. As for the features aimed at people in the period, I didn’t think it was a revolutionary thing. I can easily use Apple Health to track when I’m ovulating or log my period. I would like to see Evie take it a step further. For example, a skin temperature reading can provide more information than telling me my temperature at night. It left me wanting more because tracking body temperature is how some people can tell if they are ovulating or very fertile, especially if they are trying to conceive.
Evie is powerful, but until it updates its software and learning functions, you’re better off with a different smart ring that’s already ahead of the curve.
Reebok Smart Ring: Reebok introduces the program Reebok Smart Ring in October 2025. I was excited to see the activewear brand release its smart ring and hopefully it will be reliable in tracking fitness data. This ring failed me because of the cheap design and lackluster application. It didn’t gather as much information as I would have liked from a fit point of view, and I thought it could use some improvement.
