Smriti is a true tech aficionado and WearableXP’s resident review specialist. Her approach to technology is anything but ordinary. After years of research and expertise...Read more
In the space of smart wearables, we have only just begun shedding light on fem tech products. It took generations for humanity to finally understand the simple fact that female bodies can’t be judged by standards set for male bodies.
Bringing Women’s Health to the limelight, Evie ring came out in Jan 2024 at CES and got sold out just as quickly. Luckily I got my hands on one and with it came the chance to compare it with my Oura Gen3 that I have already been wearing for a year now.
I won’t say I am disappointed or shocked by the result of my comparison, but there’s clearly a lot more work to be done with Evie.
My Verdict
While Evie definitely looks more feminine and classy, it is far behind Oura in terms of health and menstrual tracking. Looks aren’t everything, and that’s never been more applicable than here.
Next, even though the Evie is said to be designed in a way that makes the wearer feel more comfortable, I simply think that Oura still felt better. Furthermore, it’s not just the feel of the ring but also the build quality of a ring, and when I consider that aspect, I think the Oura is more durable than the Evie Ring.
Look, feel, and durability kept aside, things like battery life offered features, and data tracking accuracy are some of the other important considerations. And well, Oura triumphed in these areas, too. Given a choice between the numbers that Evie shows me and the ones that Oura does, I know I’ll pick the latter without second thoughts.
The only thing that I absolutely love about Evie which is also missing in Oura is the portable charging case. It is just super convenient and makes the whole charging process easier than ever.
Sure, the Oura comes with a subscription, but given what Oura has to offer, I don’t mind paying the subscription fee at all.
But this was just about me. What should you choose? Understanding my experience with the two rings and seeing how I arrived at the verdict should help you with that. And so, being thoughtful as ever, I have shared that in the article below. Keep scrolling!
Look & Feel
As I just said, the Evie ring comes with one of the most unique designs I have seen in any smart ring. It has an open-cut top that isn’t there just for the quirks of it. The open-cut design ensures I feel comfortable wearing the ring even when my fingers swell due to hormonal changes.
Even though it’s very thoughtful of Evie to do that, I feel equally comfortable in my Oura ring despite the lack of an open-cut design. Like most rings– smart or not, my Oura ring is completely circular in design.
I’ve Oura in the silver horizon finish, and well, there may not be anything extraordinary about the Oura ring in this respect; I still prefer it over the silver Evie I have.
While both are quite sleek and shiny, the Evie still manages to stand out more than the Oura, which is more than I’d like it to. With a 3mm thickness and 8mm width, it’s hard to miss an Evie Ring on anyone’s finger. I like my smart wearables to be more discreet; the 2.55mm thick and 7.9mm wide Oura achieves discreetness a little better.
In fact, the lack of open-cut design is probably a blessing here because it truly allows the Oura ring to pass off as an everyday piece of jewelry without attracting a lot of attention to itself.
Furthermore, I have never been a big fan of chunky or heavy jewelry. And, well, surprisingly enough, I found the Evie ring to be marginally better than the Oura ring in this regard. It weighs around 3.2-3.7 grams, whereas the Oura weighs around 4-6 grams.
But, if I have to choose between the Evie ring and the Oura ring based on their looks and feel, I will pick the Oura ring.
Material & Durability
Both the Evie ring and the Oura Ring 3 are made of super durable material. The Evie ring consists of Liquidmetal®, a zirconium-based amorphous alloy with a titanium PVD coating which is similar to what the Oura Ring is made up of— durable titanium along with a PVD coating.
However, during my testing phase with both the rings, I found out that the Oura ring was more durable than the Evie Ring. It’s not just about scratches, even the Evie ring ended up showing more scratches than the Oura ring after a little bit of gardening and a DIY project.
It’s also that, I can take my Oura Ring to far more places than the Evie Ring and it will fare well in almost all of those conditions. For example, I can take my Oura ring to go swimming with me because it’s water resiastant up to 100m and I can’t really do the same with my Evie ring because of it’s 1m water resistance.
In fact, I have often found myself quite worried about how much water I should be exposing my Evie ring to, if the ring could get damaged if I wear it while doing dishes or in the shower, etc. I have never had such worries with my Oura Ring.
Because of all this, I see my Oura Ring 3 as more durable than the Evie Ring.
Specifications
| Specifications | Evie Ring | Oura Ring 3 |
|---|---|---|
| Material | Liquidmetal®, a zirconium-based amorphous alloy with a titanium PVD coating | Durable titanium, PVD coating |
| Weight | 3.2-3.7 grams | 4-6 grams |
| Thickness | 3mm | 2.55mm |
| Width | 8mm | 7.9mm |
| Size | 5-12 | 6 to 13 |
| Charger | – Portable charging case (up to 10 charges) – Charger battery charging time: 60 minutes max, depending on the starting charge level | Wireless charging dock |
| Battery Life | 4+ days | Up to 7 days |
| Ring Charging Time | Up to 60 minutes | Up to 80 minutes |
| Colors available | Silver, gold, rose gold | Brushed titanium, Rose Gold, Gold, Stealth, Silver, Black |
| Connectivity | Bluetooth | Bluetooth Low-Energy (Bluetooth Smart®) |
| Compatible With Other Apps | No | Yes |
| Water Resistance | Up to 1M; IP57 | – Upto 100m/ 328 ft – IP54 |
| Memory | N/A | 7 days of data (also depends on the frequency of use) |
| Compatibility | iOS v16 or above | – iOS devices running on iOS 15 or above – Android devices running on Android 9.0 or higher |
| Warranty | 1-year | One year from the date of purchase |
| In-built GPS | No | No |
| Operating Temperature | -20° to 35° C (-4° to 95° F) | -10–52°C / 14–125°F. |
| EMF-Safe | Yes | Yes |
| Airplane Mode | Yes | Yes |
| Sizing kit | Yes (Free) | Yes (Free) |
| FSA/HSA Eligible | Yes | Yes |
Battery Life & Charging
| Charging Details | Evie Ring | Oura Ring |
|---|---|---|
| Official Ring Charging Time | 60 minutes | Up to 80 minutes |
| My Ring’s Charging Time | 50-70 minutes | 80-100 minutes |
| Official Battery Durability | 4+ days | Up to 7 days |
| My Ring’s Battery Durability | 3-4 days | 4-6 days |
When it comes to battery life, I prefer my Oura ring over the Evie ring. Oura says that the ring comes with a battery life of up to 7 days, and well even though I only manage to get about 4-6 days as per my usage, it’s better than what Evie offers.
Evie advertises 4+ days of battery life, and I only manage to get around 3-4 days of battery at max which is lesser than Oura.
However, when I had the continuous SpO2 feature enabled, Oura’s battery would last only around 2-3 days, but I’ve long since turned the feature off, and I can go this long without having to charge my ring again.
When it comes to the charging process, the Evie ring offers a better experience than the Oura. With Evie, all I have to do is put the ring back in the portable charging case and leave it so for around 50-70 minutes (with the official charging duration being 60 minutes). I can carry the charging case with me wherever I go, and it can support around 8-10 charges which is a lot if you ask me.
In contrast to this, I have to place the Oura ring on a charging dock and then connect the dock to a power source via a USB C cable. An entire charge takes around 80-100 minutes, with the advertised claim being up to 80 minutes.
Sensors
| Sensors | Evie Ring | Oura Ring (Gen 3) |
|---|---|---|
| PPG Sensors |  |  |
| Skin temperature Sensor |  | |
| Photodiodes | | |
| 3D Accelerometer |  | |
| Infrared LED | | |
| Green LEDs | | |
| Red LEDs | | |
Features
| Features | Evie Ring | Oura Ring 3 |
|---|---|---|
| Heart Rate, HRV & RHR | Yes | Yes |
| Workout Heart Rate | No | Yes |
| Blood oxygen levels (SpO2) | Yes | Yes |
| Cardiovascular Age (CVA) | No | Yes |
| Sleep Tracking | Yes | Yes |
| Nap Detection | No | Yes |
| Detailed sleep analysis | Yes | Yes |
| Bedtime Guidance | No | Yes |
| Chronotype | No | Yes |
| Body Clock | No | Yes |
| Respiration Rate | Yes | Yes |
| Skin Temperature | Yes | Yes |
| Illness Detection | No | Yes |
| Steps | Yes | Yes |
| Distance Traveled | Yes | Yes |
| Calories | Yes | Yes |
| Activity Tracking | Yes | Yes |
| Sedentary Reminder | No | Yes |
| Workouts | Yes | Yes |
| VO2 Max | No | Yes |
| Period Prediction | Yes | Yes |
| Fertility & Ovulation Prediction | Yes | Yes |
| Pregnancy tracking | No | Yes |
| Mood & Energy | Yes (Manual logging) | No |
| Menstrual Symptoms | Yes (Manual logging) | No |
| Stress | No | Yes |
| Recovery | Yes | Yes |
| Spot Check | Yes (HR and SpO2) | Yes (Only HR) |
| Rest Mode | Yes | Yes |
| Daily Summary | Yes | Yes |
| Readiness Score | No | Yes |
| Readiness Insights | No | Yes |
| Trends | No | Yes |
| Set Personalized Goals | Yes | Yes |
| Personalized Wellness Assistance | Yes | Yes |
| Insights Feature | Yes | Yes |
| Share Health Reports | Yes | Yes |
| Data Export | No | Yes |
| Meditation | No | Yes |
| Guided sessions | No | Yes |
Tracking Accuracy
Activity Tracking
The activity tracking features and related data accuracy of the Evie ring are quite below average. First of all, unlike most smart rings out there, the Evie doesn’t start tracking my activity automatically. I have to start a workout feature manually. Even then, the ring will only record the duration of the entire workout and not much beyond it.
Things get even worse when I notice that even the total active minutes that the ring shows me aren’t really accurate.
As someone who likes to see more detailed stats about her workouts, I simply prefer the Oura. It not only detects my activity automatically, it also lets me choose from different kinds of workouts and later edit the details in case I think that some recorded metric was inaccurate. But I don’t really have to do that since Oura usually gets it right.
When it comes to step-tracking, I have learned not to expect much from smart rings as much— no smart ring has ever been able to match the accuracy of smartwatches like Garmin for me. And well, I don’t blame them for it.
Both Oura and Evie rings have counted steps that I haven’t even walked, so I am not particularly happy with either of their accuracies. However, if I absolutely have to choose between the two, I will pick Oura because it still does a better job at step-tracking than the Evie Ring.
Given all this, I obviously prefer the Oura Ring 3 over the Evie Ring when it comes to activity tracking accuracy.
Heart Rate Monitoring
I have always trusted my Oura Ring’s heart rate-related accuracy. So, I compared the data that the Evie Ring showed me with it. And well, the numbers that the Evie ring showed me were in accordance with the kind of data that I get to see from my Oura ring.
This is not surprising since I already knew that Evie had already applied for FDA clearance for its pulse oximeter, which tracks heart rate and SpO2, thereby showing how confident it feels about its data accuracy. If Evie manages to get this clearance, it could even call itself a medical-grade device.
Furthermore, even during the testing phase for arterial blood gas levels, the Evie ring achieved a root mean square error (RMSE) average of 2.13%. This number is way below the 3.5% guidance for SpO2 given by the FDA.
However, the Evie ring doesn’t show me any heart health score or stress score, and because it measures my HR every 30 minutes, I don’t get to see the spikes and dips that I had become so accustomed to seeing on my Oura ring. And, well, the lack of such data does bother me a bit.
So, even though the heart rate tracking accuracies of both the Evie ring and Oura ring are quite similar, I still prefer the Oura ring because of the wide variety of heart-related data it presents me with that Evie doesn’t.
Sleep Tracking
Sleep tracking is one of the main reasons why people prefer smart rings over smartwatches, and well, that’s one thing where I expect both the Evie and Oura rings to shine their brightest and show me a strong correlation between their data.
However, I am disappointed with the sleep-tracking accuracy of the Evie Ring. It is not as accurate as what the Oura ring shows me. Quite often, the ring gets something as simple as my total sleep duration wrong, which makes me trust its detailed sleep analysis even less. However, I completely trust the numbers that Oura presents me with.
What’s even worse is that the Evie ring doesn’t offer me an option to edit the duration I get to see, thereby leading to loads of data inaccuracies. Furthermore, it doesn’t show me any sleep-related insights and trends the way Oura does.
All of this combined makes Evie’s sleep-tracking capabilities far less preferable than that of the Oura ring for me.
Menstrual Tracking
Since Evie is said to be a product designed for Women’s Health, I have high expectations from its cycle tracking accuracy. I want to see how it will compare with Oura, given that the latter uses both the metrics I log in and changes in my skin temperature to see what phase of the cycle I am in. In comparison to this sophisticated system, the Evie ring only uses user-logged metrics.
I haven’t tested the accuracy of the ring in this factor yet, but I still do feel a little bummed over the fact that its system is not as advanced as that of Oura.
Until I have enough data to compare the cycle tracking accuracies of the two rings, I am surely going to keep using and trusting Oura the most.
Companion Apps
I prefer the aesthetics of the Evie app over that of the Oura app. This is saying something because I have always thought that the Oura app is one of the most visually appealing and neatly spaced out companion apps out there. However, the purple and off-white theme and cute circles that the Evie app has going on are hard to match.
However, both the apps present numbers in a way that is easy for me to understand. Both of them are intuitively built, so even though you are a complete beginner in the smart wearable space, it won’t take you a lot to navigate your way around the apps.
But, visuals apart, I have found the Evie app to be quite meaningless for me. I can’t trust the numbers it presents me with. I can’t see any trends or graphs that the Oura ring shows; the Evie app lacks the depth that the Oura offers.
So, I truly feel that even though the Evie app serves as an eye candy, it should rather focus on delivering more helpful data and insights to its users.
Pricing, Subscription & Availability
| Pricing Details | Evie Ring | Oura Ring 3 |
|---|---|---|
| Official Price | $269.00 USD | $299-$549 USD |
| Discounted Price | N/A | N/A |
| Subscription | No subscription | Yes ($5.99 a month/ $69.99 a year) |
| Availability | Only US | Some Countries in North America, Europe, Africa & Middle East, Asia & Pacific |
I purchased the Evie ring for $269.00 USD and my Silver Horizon Oura for $349. It doesn’t take a degree in finance to see that the Evie ring is way more affordable than the Oura ring.
Furthermore, the Oura ring is not a one-time purchase either. Its companion app is also a subscription, and I pay around $5.99 a month for it. In comparison to Oura, the Evie app is completely free.
However, I don’t really mind paying around $6 for the Oura app, given that it’s roughly the cost of two coffees in a month. This is why paying for the app just sounds like a fair investment to me.
Which Ring Is Worth Your Money?
Sure, the Evie ring is cheaper than the Oura ring, and its app is basically free to use, so there is no recurring cost either. But hey, the Oura ring is still worth your money, and it is way better than the Evie ring in all aspects.
So, if you have to choose between the Evie ring and the Oura ring, I will say go for Oura. It looks more stylish, feels more comfortable, and is not just pretty in looks but also quite durable!
Furthermore, battery life, features, and data accuracy are some of the most important things to consider when buying a smart wearable, and the Oura ring shines brighter than the Evie ring in all of these aspects, too.
Yes, the Evie ring is new, and we need to lower our expectations with something new in the market, but even with that considered, I will still say get the Oura without a second thought.
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Smriti is a true tech aficionado and WearableXP’s resident review specialist. Her approach to technology is anything but ordinary. After years of research and expertise in cutting-edge consumer technology, she is now exploring the world of smart wearables only to evaluate and bring her unique insights.
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