As more people aim to improve their health habits, smart rings have emerged as an intriguing alternative to traditional fitness trackers and smartwatches. These compact, wearable devices promise to deliver insights into sleep quality, stress levels, activity, and more, all from a sleek ring on your finger. After months of testing three popular smart rings—Oura Ring, Ultrahuman Ring Air, and Evie Ring—I’ve gathered detailed impressions on how they perform, their features, and which might be worth your investment.
### The Oura Ring: A Leader in Holistic Health Tracking
Among the three devices I tested, the Oura Ring stood out as my top choice, especially for sleep and stress tracking. Priced at $349, it is crafted from aerospace-grade titanium, a material noted for its strength and durability, and now also comes in colorful ceramic options. Before receiving the ring, Oura sends a sizing tool to ensure you get the perfect fit, a practice shared by other brands due to variations in ring sizing.
The Oura app, available on both iOS and Android, is one of the ring’s strongest features. It provides a clear, user-friendly interface that summarizes your sleep data, readiness score (a measure of how recovered and recharged you are), heart rate, stress levels, and even cycle insights for those who menstruate. The app uses a simple scoring system out of 100 for these categories, helping users easily understand their daily health status. It also offers a timeline showing your bedtime, wake time, and physical activity in the past 24 hours, offering a holistic view of your day.
Battery life is solid, lasting about three days on a full charge, with a convenient charging ring holder that fits neatly on a nightstand. For best results, Oura recommends wearing the ring continuously for at least a month so it can gather enough data to personalize insights and recommendations. However, to access the full suite of features, including personalized advice, users need to subscribe to the Oura membership, which costs $6 per month.
One of my personal goals was improving sleep, especially with the interruptions caused by having a baby. I preferred the Oura Ring over a smartwatch for tracking sleep because it is lightweight and barely noticeable on my finger. The ring identified my ideal bedtime window as between 9:30 p.m. and 10:30 p.m., aiming to help me get around eight hours of rest based on my typical wake time of 6 a.m. While I managed to follow these recommendations during the first couple of months, life’s stressors like moving and holiday disruptions eventually threw off my schedule. On days when I went to bed later than suggested, I felt more tired and less energetic, and the Oura app reflected this with lower readiness scores and increased stress levels.
Returning to my recommended sleep routine after moving made a noticeable difference—I felt better rested than ever. Oura emphasizes a non-judgmental approach, focusing on offering actionable advice rather than guilt. For example, if the ring detects elevated stress, it might recommend taking it easy for the day.
A standout feature of the Oura Ring is its ability to detect early signs of illness. While I haven’t personally experienced this, colleagues at CNET have noted that the ring alerted them when they were getting sick. The latest model, Oura Ring 4, incorporates AI-powered software that enhances its ability to analyze habits and health markers.
While I wasn’t particularly impressed with the fitness tracking on any of the rings I tested, Oura’s recent update allows it to auto-detect light activity such as walking or housework, recording these movements and incorporating them into your daily activity score. This is a meaningful enhancement, as it acknowledges that not all physical activity is structured exercise and encourages users to value everyday movement.
Oura also offers interesting insights such as cardiovascular age, which compares your heart health to average norms. My cardiovascular system was estimated to be eight years younger than my actual age, providing encouraging feedback on my lifestyle habits. The app also determines your chronotype—whether you’re a morning or night person—based on your natural circadian rhythms, which aligned with my own early-riser tendencies.
Stress tracking is another important feature. The ring can classify your stress levels throughout the day, identifying moments when you are stressed, engaged, relaxed, or restored. This data helps Oura tailor its recovery recommendations. For example, during particularly stressful days like moving, the ring accurately detected elevated