Friday, September 17, 2021

The Oura Ring Is a $300 Sleep Tracker That Provides Tons of Data. But Is It Worth It?

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The Oura Ring is a tiny titanium system that tracks the number of knowledge and goals to offer a clearer image of what’s occurring inside your physique. Although it’s primarily a sleep tracker, measuring time spent in every sleep stage, the ring additionally data your coronary heart fee, coronary heart fee variability, respiratory fee, pores and skin temperature, and a number of other different metrics. However, does it really assist promote a more healthy way of life?

I wore the Oura Ring repeatedly (save for just a few charging periods) for greater than six months (and I’ve been utilizing it on and off for almost a yr). I’ve discovered it to be a cleverly designed and fairly snug device that gives fascinating (to me) information and performs close to the extent of our best sleep-tracking apps. However one of many key issues setting the Oura Ring aside from these apps is its capability to trace your coronary heart fee and coronary heart fee variability (HRV) with excessive precision. One other is its capability to indicate how these very important indicators change if you sleep, meditate, and go about everyday exercise. And it additionally offers you concrete strategies for bettering your sleep primarily based on that information.

The Oura Ring instructed me extra about my physique than any of the sleep trackers we’ve examined, and after some time I did grow to be extra acutely aware of my way of life selections (maybe at instances just a little too acutely aware). And in contrast to the bulkier health trackers we examined, the Oura Ring felt gentle, compact, and trendy. Nonetheless, the ring prices are $300 (or extra, relying on the end). Is valuable that funding? The Oura Ring isn’t a great fitness tracker, so if logging exercises is necessary to you, it in all probability isn’t a very good match. However, if you wish to dive deep into your sleep and well-being information, the Oura Ring might provide you with some eye-opening insights into your physique and well-being.

Why it is best to believe us

I’m Wirecutter’s affiliate workers author for sleep. I’ve spent over 200 hours researching and sleeping with numerous sleep-tracking apps and wearables, and I’ve written about sleep trackers and their illness-tracking capabilities. I’ve been testing the Oura Ring for greater than six months. And I’ve spent greater than 10 hours talking with firm representatives, researchers, and unbiased scientists—together with Seema Khosla, MD, medical director of the North Dakota Middle for Sleep, and Jessilyn Dunn, Ph.D., assistant professor of biomedical engineering at Duke College—about sleep monitoring and wearable expertise. As somebody who has struggled to get the really helpful seven to 9 hours of sleep per evening, I’ve sought out instruments to assist me to go to sleep extra simply and get better-quality relaxation.

What’s the Oura Ring?

The Oura Ring is a wedding-band-like sleep tracker that collects information about your physique, exercise, and sleep utilizing optical heart-rate monitoring, typical expertise in fitness trackers. Made from titanium, the Oura Ring goes in your index, center, or ring finger. Oura launched in 2015 with a Kickstarter campaign for the first-generation ring (which was bulkier than the present model). The second-generation ring got here out in 2018. The ring shines infrared gentle beams via your pores and skin and makes use of sensors that seize modifications within the mirrored gentle beams to trace your respiratory fee (what number of breaths you are taking per minute), your coronary heart fee, and—maybe most necessary—your heart rate variability. The Oura Ring makes use of these information factors, together with an accelerometer to detect motion, to trace your sleep and exercise, transmitting your outcomes to an accompanying app through Bluetooth. The ring additionally contains two sensors that measure your pores and skin temperature.

The app makes use of this information to construct three scores: Sleep, Exercise, and Readiness. Oura’s Sleep rating is usually equal to the scores you possibly can see within the sleep-tracking apps we recommend. Like these scores, this one is fairly simple: The extra whole sleep you get per evening—and, inside that, the extra time you spend in REM sleep and deep sleep—the upper your rating will probably be. Your sleep rating additionally takes under consideration components similar to your sleep effectivity (whole time mendacity down in mattress divided by the full quantity of sleep detected) and the way correlated your sleep is to the autumn and rise of the solar. The Exercise rating, too, is what you may count on: The extra you progress round through the day, the extra your rating goes up. However, when you train strenuously, to maximize your rating (and the impression of your exercise), it is best to sprinkle in just a few restoration days, as properly, for the reason that Oura Ring components restoration time into its rating.

Screenshots from the Oura iOS app showing various metrics.

An instance of Readiness rating output. You’ll see your resting coronary heart fee, HRV, temperature, respiratory fee, and Readiness rating (left), together with a determine exhibiting how every metric contributes to your rating (heart), plus graphs of your coronary heart fee (prime proper) and HRV (backside proper) all through the evening.

The Readiness rating is the catchall, principal rating the Oura Ring offers you. It combines parts of your Sleep and Exercise scores to construct a metric that measures your “readiness” for the day. Every morning, it’s the primary rating you see when you open the app, and it’s the rating that (supposedly) greatest encapsulates your normal well-being. Along with parts from sleep and exercise, including on this rating are your resting coronary heart fee, your coronary heart fee variability, and your pores and skin temperature.

The Oura Ring’s capability to detect heart rate variability is of specific curiosity. Coronary heart fee variability (HRV) is a measure of the regularity (or irregularity) of the time between pulses. For instance, in case your coronary heart beats in sync with a metronome, your HRV is near zero. But when the time between pulses often differs barely from beat to beat to beat, your HRV is excessive. Maybe counterintuitively, extra variability within the time between beats might counsel you’re extra relaxed and properly; a number of a long time’ value of research has proven that low HRV might be related to bodily or emotional stress (together with from an illness). After utilizing the Oura Ring for some time, you’ll have a dependable baseline in your HRV. Should you then discover an exceptionally lower-than-normal HRV measurement, it might be an indication your physique is underneath stress.

Josh Hagen, PhD, director of the Human Efficiency Innovation Middle on the West Virginia College Rockefeller Neuroscience Institute, has partnered with the maker of the Oura Ring to check its functions for athletes and the army. He instructed me that he’s a proponent of utilizing HRV to observe efficiency as a result of it might approximate an individual’s restoration from the day before today and their coaching capability for the upcoming day. In case your HRV is increased than regular, Hagen instructed me, you could possibly deal with a heavier bodily workload for the day; in case your HRV is decrease than standard, it may be a very good day to relaxation up. Decrease-than-normal HRV may also sign an immune response to a sickness; the truth is, early within the COVID-19 pandemic, a number of wearable-tech corporations—including Oura and Fitbit—partnered with researchers to find out whether or not their HRV-tracking units may detect COVID-19 instances earlier than signs began (extra on that below).

Most health trackers (together with the trackers we recommend) use inexperienced gentle beams to measure your pulse. The Oura Ring, in contrast, makes use of infrared frequencies. “You will have a sooner fluctuation within the sign [in the green light],” Jessilyn Dunn, the Duke College researcher learning the COVID-19 applications of wearable units, instructed me, “and that sooner fluctuation has a lesser likelihood of being attenuated by a substance that it’s flowing via.” In different phrases, shorter, inexperienced wavelengths produce a clearer sign and are extra “sturdy” in opposition to the motion. Nonetheless, though inexperienced wavelengths can stand up to motion extra simply, Dunn instructed me that inexperienced gentle is “extra delicate to elements of the tissue.” For instance, the melanin absorbs inexperienced gentle extra successfully than it does infrared gentle. As a result of infrared gentle has a longer wavelength, it might penetrate deeper into the pores and skin, however, the sign can also be weaker, so it’s extra simply dispersed by movement. Consequently, any measurement of coronary heart fee or HRV throughout motion with infrared is worse than a measurement with inexperienced gentle. And due to that, the Oura Ring doesn’t measure coronary heart fee, HRV, or physique temperature whilst you’re lively.

What we like in regards to the Oura Ring

The Oura Ring is a well-made system that may be helpful when you’re trying to enhance your sleep. Weighing simply Four to six grams (relying on your ring measurement), the Oura Ring is especially gentle; I’ve barely observed it on my finger. In contrast with wrist wearables just like the Fitbit Charge or Apple Watch, it’s extra compact and discreet—the ring seems to be like a minimalist marriage ceremony band. (It additionally is available in different colors and finishes, together with a $1,000 version with diamonds.) Contemplating how small the Oura Ring is, the battery lasts a very long time. I used to be capable of put on the ring repeatedly for every week earlier than needing to cost. (Relying on your ring measurement, charging takes about 60 to 80 minutes from empty, which is on a par with our prime fitness-tracker picks.)

The Oura Ring, proven linked to its charger. Photograph: Justin Redman

The accuracy of the Oura Ring’s sleep-tracking information was near that of different sleep trackers we’ve examined, but it surely didn’t stand out from the pack in this regard. Within the firm’s most up-to-date validation study (PDF), performed on its first-generation mannequin in 2016, the Oura Ring’s sleep staging agreed with polysomnography—the gold-standard sleep evaluation you’d obtain at a sleep lab—about 66% of the time. (Although the corporate has mentioned its sleep staging has possibly improved with the second-generation ring, it has not launched any new findings concerning validation of that mannequin.) In keeping with the validation study (PDF) for SleepScore, our sleep-tracking app choose, SleepScore agreed with polysomnography 73% of the time, an end result that means barely increased accuracy. In fact, company-led validation research should be taken with a grain of salt. However in our personal, unscientific comparisons, we additionally famous that the Oura Ring didn’t seize as a lot of REM sleep as SleepScore did. Nonetheless, given the massive uncertainty in sleep monitoring (significantly without mind waves), it’s extra necessary to look at developments quite than uncooked information anyway.

What units the Oura Ring aside from different sleep trackers is its capability to measure your coronary heart fee, HRV, and pores, and skin temperature whilst you sleep. The corporate says these measurements can present clues about how properly you’re sleeping, how rested you’ll really feel within the morning, and presumably your stress ranges and emotional well-being, and even whether or not you’re coming down with one thing. Usually, when your physique is working more durable—whether or not as a consequence of bodily exertion, fighting an infection, or emotional stress—your coronary heart fee will increase, your HRV decreases, and your pores and skin temperature rises. The corporate validation studies (PDF) have proven the Oura Ring’s measurements of coronary heart fee and HRV to be 99.9% and 98.4% correct, respectively, compared with an electrocardiogram.

These further information factors give the Oura Ring’s analyses extra nuance in contrast with what most sleep trackers provide. For instance, I moved from Virginia to New York Metropolis in July 2020. Leaving wasn’t straightforward; apart from a semester away at graduate college, Virginia has all the time been dwelling. I used to be frightened about residing alone within the large metropolis, about being so removed from the household, and in regards to the pandemic ravaging the nation. As my transfer approached, my anxiousness went via the roof. Unsurprisingly, at the moment, my Oura Ring recorded a sudden lower in my HRV.

Screenshots from the Oura iOS app showing heart rate data.

My HRV plummeted my first evening in New York and stabilized shortly (left), however, my resting coronary heart fee remained significantly elevated (heart) till my air conditioner was up and working (proper).

At its nadir, on my first evening in New York, my HRV was greater than 30% decrease than my baseline. Nevertheless, it shortly rebounded to regular ranges within two days, mirroring my emotions as I acquired extra accustomed to my new environment. Apparently, each my resting coronary heart fee and my pores and skin temperature elevated, too, however, these modifications had been longer-lasting, as neither returned to regular ranges till I lastly put in my air conditioner 5 days later (New York was within the midst of a warmth wave). As soon as my house cooled down, my coronary heart fee and temperature declined precipitously. I slept higher, too.

To be clear, the Oura Ring didn’t precisely clue me into some unknown phenomenon—I knew I used to be pressured, and I knew that my new house was unusual heat surroundings for sleep. However, I appreciated how the ring validated my impressions with concrete information. I’m undecided how frequent an issue that is, however, once I go to the physician, I typically wrestle to articulate how I’m feeling, even when I do know one thing is flawed. (My anxiousness all the time spikes when the physician asks me: “Are you able to fee the ache on a scale from 1 to 10?”) Having a device that creates easy-to-understand metrics might be helpful when you typically have a tough time figuring out the way you’re feeling on the surface and connecting it with what may be occurring inside your physique, or vice versa.

The Oura Ring additionally gave me more detailed details about my sleep high quality and methods to enhance it, which helped me really feel extra accountable for my physique. Different sleep trackers, whose information units had been extra restricted, would merely log the period and phases of sleep I skilled every evening after which provide generic strategies for a way I would enhance. The Oura Ring, in contrast, may pinpoint particular bodily components which will have impacted my sleep and the way rested I felt. For instance, one morning the app knowledgeable me: “Appears to be like like one thing stored your coronary heart fee up the final evening. To provide your physique the remaining it wants, strive to take it straightforward at present… An intense coaching day, a late evening exercise, elevated physique temperature, or heavy meal simply earlier than mattress can hold your [resting heart rate] elevated through the evening.”

The ring recognized an issue with my sleep, advised why which may have occurred, and offered recommendations on methods to repair it. For that purpose, I appeared to vary my habits much more primarily based on the Oura Ring’s information in contrast with how I reacted to different sleep trackers. On some days—particularly on weekends once I went to mattress late—I might get up quick on sleep, see that my scores had been too low for my liking, and return to sleep for some time, whereas in any other case I might’ve simply begun my day. Over time, this consciousness led me to simply go to the mattress earlier as a substitute. I began understanding extra, and I started monitoring my food and drinks consumption extra carefully. I can’t say whether or not the Oura Ring has made me more healthy, but it surely has made me extra health-conscious.

Screenshots from the Oura iOS app showing the meditation feature.

The Oura app’s Second meditation characteristic offers you prompts for respiratory and mindfulness and has a countdown timer in your session. Whilst you meditate, the ring tracks your very important indicators, exhibiting you the way your physique responds to this calming interval.

Oura’s app additionally has a meditation characteristic, known as Second, which offers each guided and unguided meditation period whereas accumulating physiological information. I’m not a lot of meditators, however, I discovered the Second meditation characteristic helpful, particularly because it may detect how my coronary heart fee, HRV, and pores and skin temperature modified through the session, one thing that different meditation apps can’t do. The guided periods are much like what you could find on Headspace, our choice for the best meditation app, however the choices are much more restricted. Though it’s a pleasant characteristic, I wouldn’t suggest shopping for the ring if what you’re primarily searching for is a meditation information.

Screenshots from the Oura iOS app showing details of a a specific session.

An instance of the information output from a Second session. Throughout my session, my coronary heart fee (left) and HRV (heart) decreased, and my pores and skin temperature elevated (proper).

The ring has a two-year limited warranty, which is commonplace for a wearable (although if you must exchange your first Oura Ring inside the guarantee window, your second ring is roofed for both the rest of your authentic guarantee or solely 90 days, whichever is longer). It covers “defects in materials and workmanship” however doesn’t cowl minor scratches and dents or harm associated to misuse or accidents.

What about information privateness and safety?

The Oura Ring is compliant with the GDPR (the European Union regulatory commonplace for information and privateness, broadly thought of a stronger commonplace than US privateness legal guidelines), so all information is de-identified, anonymized, and aggregated.

Is information encrypted?Sure.
Does Oura Well being share or promote information?Oura won’t ever promote your information. It’ll share information solely with third events which have privateness and safety requirements no less than as rigorous as its personal.
What biometric information does the Oura Ring accumulate?Coronary heart fee, HRV, respiration fee, pores and skin temperature, and motion.
Are you able to delete information?You possibly can entry any information the Oura Ring has collected and request removing of some information.

Flaws and potential dealbreakers

Probably the most fascinating functions for the Oura Ring is its illness-tracking capability, however whether or not it’s a very efficient device for that is nonetheless unknown. Scientists have been researching to see whether or not they can establish the refined deviations from individuals’s baselines that might predict the onset of illnesses like COVID-19, particularly in asymptomatic or pre-symptomatic instances.

Researchers at West Virginia University paired the Oura Ring with a specialised app to trace COVID-19 signs amongst health-care employees. In Might 2020, primarily based on early outcomes from the examine, they introduced that the Oura Ring may detect COVID-19 “as much as three days” earlier than signs began with 90% accuracy. (Although the examine was funded by the college, Oura labored carefully with researchers in offering entry to information.) The NBA even provided Oura Rings to all gamers returning to play in Orlando, Florida, in summer time 2020, in hopes that the ring may assist detect coronavirus infections earlier than signs occurred.

WVU hasn’t launched a full peer-reviewed examine or up to date its findings for the reason that preliminary launch, and with the widespread availability of COVID-19 checks and vaccines, the ring’s theoretical illness-tracking capabilities appear extra like a cool doable characteristic than a real public-health device. For me, even the potential to know whether or not or not I used to be coming down with one thing was a double-edged sword. Once I first examined the Oura Ring through the summer time of 2020, the pandemic was nonetheless raging within the US, there have been no vaccines, and we had been all working in a world of unknowns. I seemed to my Oura Ring information every morning for an affirmation that I used to be okay (and didn’t have COVID-19). That ultimately led to a considerably unhealthy dependency on the ring and its information. Earlier than you buy a tool like this, you could ask your self whether or not you’ll use the information to make higher selections, or whether or not it is going to trigger you pointless stress.

Though the Oura Ring is a strong sleep tracker, it’s a mediocre health tracker. As we talked about above, the infrared gentle that the Oura Ring makes use of for optical heart-rate monitoring is much less correct throughout motion in contrast with the inexperienced gentle utilized in health trackers. So the Oura Ring merely doesn’t accumulate a lot health information—together with coronary heart fee, HRV, or respiration fee information—whilst you’re exercising. The ring isn’t marketed as a health tracker, as our picks for the best fitness tracker and the best GPS running watch are. Nevertheless, it’s powerful to justify paying $300 or extra for a wearable with such restricted health information, particularly when the Fitbit Charge offers you each sleep and health monitoring (albeit without HRV) and prices around $100.

Earlier than you buy a tool just like the Oura Ring, you could ask yourself whether or not you’ll use the information to make higher selections or whether or not it is going to trigger you pointless stress.

The Oura Ring can also be very costly in contrast with sleep-tracking apps. The Premium model of SleepScore, our favorite sleep-tracking app, prices $50 per yr; the Premium model of Sleep Cycle, one other app we suggest, prices $30 per yr. You’d personal the ring for six or 10 years, respectively, earlier than it will pay for itself in contrast with these apps (as acknowledged above, the guarantee lasts solely two years). And the Oura Ring lacks the good wake-up alarms that even the free variations of each app provide; these alarms go off once they detect you’re in gentle sleep throughout a specified wake-up window. I discovered that the apps’ good alarms made an enormous distinction in how refreshed I felt within the morning.

Duke College’s Dunn instructed me that one of many largest points her workforce had with the Oura Ring was the inflexibility of the fabric. As a result of your finger modifications measurement barely all through the day and evening, your ring may be barely free if you fall asleep however be particularly tight within the morning. She advised that the ring may ultimately be fabricated from versatile materials in order that the match could be extra constant and comfy.

This may be a small factor, however as a result of the ring is so, properly, small, I misplaced it on a regular basis. Generally, I’d intend to take it off for a couple of minutes and never be capable of discovering it once more for hours. Often it was someplace silly, like in my pants pocket or on an espresso desk, however, I might misplace it no less than two or 3 times per week (which really affected my Exercise rating, for the reason that ring couldn’t accumulate information once I wasn’t carrying it). Should you spend $300 on something, the prospect of misplacing it that many instances could also be regarding. One other concern: The corporate instructed me that wearers ought to take away the ring earlier than actions, like weight lifting, that might harm the ring, suggesting it might not be sturdy in all conditions (although it’s water-resistant as much as 100 meters).


  1. Harpreet Rai, CEO of Oura Ring, phone interviews, May 7, 2020, May 15, 2020, September 1, 2020
  2. Josh Hagen, PhD, director of the Human Performance Innovation Center at Rockefeller Neuroscience Institute at West Virginia University, phone interviews, May 15, 2020, May 26, 2020
  3. Seema Khosla, MD, medical director at North Dakota Center for Sleep, phone interviews, May 19, 2020, June 12, 2020
  4. Jessilyn Dunn, PhD, assistant professor of biomedical engineering at Duke University, phone interviews, June 17, 2020, August 28, 2020

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