What Features Evie Ring Nails and What It Fails?

Evie ring is probably the best-looking ring on the market right now, it looks chic and classy. However, looks aren’t everything. No matter how much of a fashion freak you are, you have to decide whether a device is worth your money or not.

I personally have very strong opinions about Evie Ring’s features, what it tracks, and how well it uses its metrics. There are a bunch of features that Evie has introduced that no smart ring had before, but there are also some very basic things that it should have implemented that rings before Evie very well have.

Let’s get into it, shall we?

Evie Ring Features and Tracking Capabilities

The Evie Ring App has a simple yet loaded interface. On the home tab, I can check my key health metrics with a colorful graphical presentation. The Evie App covers almost every feature available in other popular smart rings, and it’s free. But there is more to it.

Here is the list of the sensors Evie Ring comes with:

• Red and Green LEDs
• Infrared PPG sensors
• Skin temperature sensors
• Photodiodes
• 3D Accelerometer

Tracks Important Health Metrics

Evie Ring is focused on women’s health but also covers major health vitals. From HR/HRV to SpO2, the range of health features offered by the Evie Ring is commendable.

HR

Evie Ring tracks heart rate (HR) every 5 minutes, 24/7 when the user is awake or sleeping. It also tracks HR every minute when a user is logged into Workout Mode. You have the option to Spot Check your heart rate for 40 seconds and get a quick insight.

HRV

Everyone has a unique baseline HRV. HRV refers to the variations in time between heartbeats. It simply helps to understand how quickly my heart rate returns to the baseline after heavy workouts or a stressor. Normally, my HRV score is pretty high (~90-93), as per my Apple Watch. However, the HRV score tracked by Evie Ring often shows a drop that concerns me.

Resting Heart Rate

Since the Evie ring tracks your HR all day and night, after you wake up from your sleep, it will give you an average Resting heart rate. RHR will not be shown before you wake up from your sleep. Since Evie doesn’t offer nap tracking at all, you cannot see your resting heart rate after your nap.

Respiration Rate

Evie Ring tracks the Respiration Rate throughout sleep time to draw a baseline. The baseline respiration rate differs between men and women. Women tend to show a higher baseline respiration rate. Evie Ring diligently tracks the Respiration Rate during different phases of the month, helping women better understand their health.

Skin Temperature 

Tracking skin temperature plays a key role in monitoring menstrual health. Evie Ring comes with skin temperature sensors and claims to accurately track the average skin temperature variation. However, the Evie ring only tracks skin temperature when you are asleep, never otherwise.

It was a bit disappointing to learn that Evie doesn’t use skin temperature to give ovulation, fertile and infertile days. That’s because skin temperature is a key metric that can accurately detect ovulation, just like Oura does it with Natural Cycles. Evie being a “women-centric” ring and not implementing basic women-centric features was a big turn-off for me.

Blood Oxygen (SpO2)

Evie Ring has a blood oxygen saturation level tracking feature. It continuously tracks your SpO2 while you sleep and gives you the number when you wake up.

I tried the Evie Ring Spot Check feature for SpO2. Using this feature lets Evie Ring track SpO2 for over 40 seconds so that users can have real-time data. Since Evie has applied for FDA approval for being a pulse oximeter, it claims to have passed the accuracy test and there’s no approval from FDA yet.

Still, it’s refreshing for a smart ring to attempt being a medically graded device.

Menstrual Health

Evie Ring is focused on women’s health. Naturally, when it comes to menstrual health tracking, my expectations from Evie Ring were significantly high. But what I found was not worth it. First of all, Evie Ring does not use the skin temperature variation data to predict the ovulation period. Secondly, Evie Ring tracks the menstrual cycle and predicts the ovulation period based on the data of the previous cycle that the user manually logs in.

What Evie Ring is promoting is the difference between the different health metrics scores (Sleep score, SpO2 level, and HRV) during the menstrual cycle and other times of the month. Users can manually log in their mood, even during their cycle. My point is, if everything the user is doing, what will the ring do?

Sleep Quality

Evie Ring tracks sleep duration, sleep stages, and overnight vitals. The Sleep Quality feature allows you to check sleep patterns and the duration of each sleep stage. It helps users figure out their deep sleep duration and REM, including the time they spend in each sleep stage. The sleep tab also shows data for sleeping respiration rate.

However, Evie Ring neither tracks “naps” nor lets users manually enter them. This is disappointing to me as I cannot measure my daytime short naps using the Evie Ring. Also, the sleep score and the overall graph are very basic and didn’t match my expectations. Evie tracks the following metrics in sleep-

• RHR
• HRV average
• Skin temp. variation average
• SpO2 average
• Respiration Rate

Activity Tracking

Evie Ring’s activity tracking looks pretty sloppy to me. The “Daily Summary” feature allows users to set individual activity and recovery goals. Throughout the day, Evie shows an activity progress bar based on the goals. Active minutes, steps, and calories burned are all traced by the ring and displayed on the top of the Daily Summary circle.  

Moreover, Evie Ring does not automatically detect activity, which is a major bummer. I always have to manually add workouts. There aren’t even many options in selecting what kind of activity or workout I am doing. Evie ring tracks the following metrics when you manually add a workout-

• HR
• Calories
• Steps
• Distance

Also, the step count and calories burned data are not accurate compared with my Apple Watch. It always shows me a step count of ~10% more than my Apple Watch.

Evie Ring Design

Evie’s design is probably the biggest differentiator that sets it apart from the market. The fact that the team behind Movano actually thought about the very basic swollen fingers in females. It is such a common thing in girls, yet no one before Evie had thought about it.

The open-cut design allows your fingers to adjust even when they swell, and besides, it looks pretty classy as well. Finally, something that looks fancy and feminine on my hands, unlike Oura, which seems pretty heavy on my slim fingers.

Evie Ring App

The Evie Ring app is simple and easy to use. If someone is using the Evie Ring app for the first time, they won’t find any difficulties. However, someone like me who is already using the Oura app and Ultrahuman app can find the Evie app “too clean”. This is because, personally I think Evie shows less data than other ring apps.

Evie’s app has Daily Summary, personalized insights, and Sleep tabs. Its Journal feature allows users to log in their mood which is something new.

For instance, the Sleep data (graph) lacks the projection of heart rate, respiration rate, and SpO2. I cannot find the map of these data throughout the night! Moreover, the app is missing “trends”. Important nighttime data like heart rate, respiration rate, and SpO2 scores are erased the next day. There is no way the user can compare the metrics with the previous day.

Frequently Asked Questions

Wrap Up

While the Evie ring has all the necessary sensors to track everything necessary, I don’t think it is utilizing all of it to make it more useful for Women. Such as its skin temperature not being used in ovulation assessment. Even Oura and Ultrahuman do better cycle tracking than Evie, then how is it a differentiator in the female sector?

That’s it for now; I hope Evie makes the best use of its features in the coming updates and proves its worth.