The 2 Best Sleep Trackers of 2025

Top pick

This stylish ring tracker offers consistently accurate heart-rate data and easy-to-follow guidance. But its activity tracking needs improvement.

Who it’s for: This model is ideal for people seeking a discreet, easy-to-use sleep tracker with lots of personalized advice.

How it works: The Oura Ring Gen3 is a titanium, wedding-band-shaped device that shines infrared (red and green LED light) beams through your skin and uses sensors to measure your respiratory rate, heart rate, heart-rate variability (HRV), blood-oxygen levels, and body temperature. It uses those metrics to track your sleep, and an accelerometer logs your activity and movement. It then synthesizes the two chunks of data—your sleep versus your energy output—to give you three daily scores, Sleep, Activity, and Readiness.

Why we like it:

It measures sleep well. Our testers generally reported that the Oura Ring logged their sleep accurately in comparison with their journals. Oura’s validation studies suggest that the company has invested in improving the accuracy of its sleep tracking. In a 2021 validation study of the current, third-generation Oura Ring, the device agreed with a polysomnography test 79% of the time, up from just 66% in the company’s 2016 validation study. A 2024 study, conducted by independent researchers with funding from Oura, concluded that the Oura Ring “did not significantly differ from PSG for the measures time in bed, total sleep time, sleep onset latency, sleep period time, wake after sleep onset, time spent in light sleep, and time spent in deep sleep.”

It measures heart rate and heart-rate variability accurately. The Oura Ring’s infrared light beams, located on the interior of the ring, helped to accurately measure heart rate and HRV while our testers were active and during rest. When tested against a heart-rate sensor, the Oura Ring proved to be the most closely aligned of all the sleep-tracking devices we tried.

Oura’s own validation study (PDF) shows that its HRV measurements are 98.4% accurate when compared against an electrocardiogram. Oura’s device was one of the first wearable trackers to measure HRV, which indicates the regularity or irregularity of time between pulses. High HRV is generally good; it suggests that you’re relaxed and well. Low HRV, when your heart beats in sync with a metronome, may be associated with physical or emotional stress.

Anecdotally, we found that the Oura Ring picked up on low HRV during times of high stress or sickness. For instance, the Oura Ring correctly registered that I was experiencing more stress than usual during a family emergency. Another tester found that while she was under stress during travel that affected her sleep, the Oura Ring picked up on her lower HRV and encouraged her to prioritize rest and relaxation.

Its data is easy to read and digest, and its app is easy to navigate. Like many of the sleep trackers we tested, the Oura Ring throws a lot of data at you in the form of color-coded charts and graphs. But it does a good job of presenting the most important information first. One tester, who describes herself as tech-averse, appreciated that the Sleep score appeared front and center in the app. Tapping the Sleep score leads to helpful recommendations.

In addition to your Sleep score, Oura offers an Activity score, which reflects how much you’ve moved around during the day, and a Readiness score, which combines elements of your Sleep and Activity scores to calculate your readiness for the day. For further data, you have to go looking in the Reports tab, which can appear at first like “a lot of lines and numbers” but was also easy to get used to, said that same tester.

Its recommendations are personalized and easy to implement. Of all the trackers we tested, the Oura Ring offered the most useful behavioral directives. Most of the sleep trackers we tried gave our testers a sleep score and sporadic nudges to get up and walk or to go to bed earlier, but not much else. The Oura Ring, on the other hand, told our testers to rest immediately when it noticed a low-HRV trend and recommended a breathing exercise or meditation.

After a night of tossing and turning, one tester was greeted with “Hope you’re feeling better after only getting 4 hrs and 59 minutes of restless sleep,” along with guidance to get fresh air and avoid an afternoon nap.

Our testers also found that they weren’t shamed for having non-typical sleep patterns. For example, rather than continually pushing a night owl to go to bed by 10 p.m., the Oura app adapted to their sleep habits to determine realistic bedtime goals.

It’s stylish, lightweight, and comfortable. The Oura Ring looks and feels like a piece of jewelry. It comes in two styles (smooth or faceted) and multiple finishes (silver, black, matte black, gold, and rose gold), so it’s easier to coordinate with your clothing and accessories than most wristband-style trackers. Our testers found it the easiest and most comfortable to wear of the trackers we tested.

Flaws but not dealbreakers

Its activity tracking can be inaccurate. The Oura Ring struggles to categorize certain types of exercise. While our testers reported accurately measured intensity, as in steps walked or calories burned, it sometimes falsely logged a jog as cycling, for example. You can edit miscategorized activities in the app, but doing so can be a nuisance. (The Oura Ring integrates with Strava, a fitness-tracking app and social media platform, but it’s not seamless: you have to be signed into the Strava app and select the activity you want to track.) If accurate workout tracking is important to you, consider our also-great pick, the Whoop 4.0, or the Fitbit Inspire 3.

It’s expensive and requires a monthly subscription. The Oura Ring costs $300 to $550 depending on the design and finish (the technology and features are the same in all models). And you have to sign up for a monthly subscription, for a total cost of about $72 per year, to access most of Oura’s data and recommendations.

And it’s easy to lose. Testers also found that the Oura Ring was much easier to lose track of than other wearables, as they were more likely to take it off throughout the day to wash their hands, do chores, or shower. The Oura app for iOS has a Find My Ring feature, which will show the last location that your Oura Ring connected to your phone. But keep in mind that that might not be where you left it.

Key specs

• Subscription cost: $72 per year
• HSA/FSA eligibility: Yes, for the purchase of the device. Subscription and extended warranty fees aren’t eligible.
• Battery life: up to seven days
• Water resistance: water resistant for up to 12 hours down to 330 feet
• Warranty: one year
• Privacy: Oura doesn’t share the personal information it collects from its app or device for advertising and marketing purposes, but it does share your data internally. If your data is shared internally, the company encrypts and anonymizes it. For details, read more about Oura’s privacy policy.