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30-day refund / replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
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Availability:
In Stock.
Arrives
Wednesday, Oct 28
At a glance
- Condition
- New
- Style
- Metallic
- Color
- Stealth
- Size
- 6
- Model
- JZ90-54218-06
- Dimensions
- 1.06 x 1.06 x 0.31 in
- Weight
- 0.19 kg
- Warranty
- 1 Year Manufacturer
- Works with
- Smartphone
Features 4
- ACCURACY - SMART SENSING - Oura tracks over 50 health metrics, including sleep, activity, stress, heart health, and womens health metrics. Oura Ring 4 is powered by Smart Sensing, which adapts to you delivering accurate, continuous data, day and night
- LONG LASTING BATTERY - With up to 8 days of battery life, no screens and no vibrations, Oura Ring 4 allows you to focus on the present. From a workout to a night out youre free to forget its on. Until you start getting compliments
- OURA MEMBERSHIP - First month of membership is included with purchase, for new members only. Subscription is 5.99/mo afterwards. Membership is tied to your account via the Oura App, not your physical ring
- HSA/FSA ELIGIBLE - We can accept HSA or FSA funds for the following: Oura Ring, additional chargers, and shipping
Description
Introducing Oura Ring 4: the latest evolution of the revolutionary smart ring. Oura Ring 4 brings you closer to what matters most — your health. The updated all-titanium design is powered by Smart Sensing, a new sensing platform that doesn’t just measure your biometrics, it adapts to you, providing insights into over 50 health metrics including sleep, readiness, activity, heart health, stress, metabolic health, and women’s health. Oura Ring quietly and comfortably monitors your health and with 5 to 8 days of battery life — you can forget it’s even on. With multi-ring support, change Oura Ring 4 styles as easily as changing your outfit. If you have two or more Oura Ring 4 styles, you can now switch easily between different finishes in the Oura App.
Specs 38
| Operating System | i_os, android |
|---|---|
| Special Feature | Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight |
| Connectivity Technology | Bluetooth |
| Wireless Communication Standard | Bluetooth |
| Battery Cell Composition | Lithium Polymer |
| GPS | GPS Via Smartphone |
| Shape | Round |
| Brand | OURA |
| Model Name | Oura Ring 4 - Stealth - Size 6 |
| Style | Metallic |
| Additional Features | Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight |
| GPS Geotagging Functionality | GPS Via Smartphone |
| Band Material Type | Titanium |
| Water Resistance Level | Water Resistant |
| Human Interface Input | Buttons |
| Supported Application | Fitness Tracker |
| Water Resistance Depth | 100 meters |
| Supported Satellite Navigation System | GPS |
| Metrics Measured | Body Temperature, Menstrual Cycle, Sleep Duration, Stress |
| Closure Type | Tang Buckle |
| Style Name | Metallic |
| Color | Stealth |
| Wireless Compability | Bluetooth |
| Communication Feature | Bluetooth |
| Warranty Type | Standard |
| Target Audience | Unisex Adults |
| Age Range Description | Adult |
| Model Number | JZ90-54218-06 |
| Built-In Media | Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide |
| Wearable Computer Type | Smart Ring |
| Manufacturer | Oura |
| Battery Cell Type | Lithium Polymer |
| Battery Average Life | 5 days |
| Battery Charge Time | 80 minutes |
| Display Type | Analog |
| Item Weight | 0.19 kg |
| Item Dimensions | 1.06 x 1.06 x 0.31 inches |
| Item Dimensions D x W x H | 0.31"D x 1.06"W x 0.31"H |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Oct 28
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
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- Afterpay Financing
- Zip Pay in 4
- Financing through Apple Pay
- Financing through Google Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Lasted 1 year
Style: Metallic
Color: Silver
Size: 14
Was a comfortable , stylish ring and good health tracker but died after just over a year. Battery life deteriorated to 2 days but reported fully charged after 5-10mins on dock, and now it won't charge at all. Too expensive to replace annually on top of membership fee. I used the AI chatbot on the app, took only a few minutes of simple testing to prove it had failed and they instantly ordered a replacement free-of-charge (with a spare USB dock to boot), which arrived in 4 days. Amazing service!
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Reviewed in the United States on September 16, 2026 by Amazon Customer
Has helped me to improve my sleep
Style: Metallic
Color: Silver
Size: 8
This is an expensive purchase for me. But it has been more than worth it. The aspect that I wanted from the ring is measuring my sleep patterns. I have insomnia and it reminds me that I need to stay in bed longer, and it lets me know what my deficit and sleep is. This has helped me to know why I am so tired all the time it has made quite a difference in my health.The charge lasts for a long time, which is nice. I do not have to charge it every night. I know that there are less expensive rings out there, but I went ahead and purchased this one based on word-of-mouth. And I am very happy that I did buy this particular brand.
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Reviewed in the United States on August 11, 2026 by Scott Alexander
Amazing data collection… but a very steep price and short life.
Style: Metallic
Color: Silver
Size: 12
Note: This is a long term review, after owning the ring for 10 months. It disappoints me to have to give this a 1 star review, because when the ring works, it works. It’s very convenient, accurate, un-intrusive to wear, and gives you a ton of valuable data, especially related to your cardiovascular system. But, out of the blue about 10 months into my ownership, battery life has cratered, and even when it doesn’t run fully discharged, it has randomly started disconnecting, meaning it’s not harvesting the data that I expect and want it to, and even worse, without full days of data, it won’t build any trends, meaning the limited data it does collect is useless. Reading online it seems I am not the only person experiencing this disappointment. Oura’s customer service is non existent. I have yet to figure out how to get in contact with a human there. All their customer service is routed through “Finn” their AI assistant. After trying everything that “Finn” has recommended numerous times, and getting nowhere, it would be an understatement to say I am frustrated. One of “Finn’s” suggestions is to fully wipe the ring and app from your phone and reinstall it, and if that doesn’t work, the implication from the system is that it will then elevate it to a customer service rep. The issue with that is when you do that, a hard reset and reinstall, the record with “Finn” also seems to go with it, so the system will never engage a human, it comes across almost like it’s intentional firewall in their service. I am coming up on my 1 year membership renewal. I am at the point where I need to decide if I need to make the $72 annual investment again. I would gladly spend that again, but I’m not really looking at a $72 investment. Given my current ring performance, this means buying another ring. Between the membership and a new ring, with taxes, shipping, etc, etc, etc that’s a near $500 investment; and since it only made it 10 months, that really means it’s effectively closer to $600 a year. Battery powered wearables have a limited life; I went into this understanding that, but, I don’t think that after less than a year of usage, going from ~5 days of battery life and collecting non-stop data to less than 24 hours of life with random crashes is in any way acceptable. Apple or Garmin or Google would have mass recalls or replacements on their hands if their wearables behaved like this. Good health is priceless. The ring helped me tremendously in my fitness journey. I have lost over 65 lbs with its help. At this point, however, given I have hit and am maintaining my weight goal, and from my current experience as well as based on what I read from others online, I refuse to spend any more money with Oura, simply because of their poor customer service and poor product life. My final thoughts: the ring makes your fitness journey significantly easier. Data is king when you’re committed to self improvement. For that, I give it 5 stars; but if you buy one, understand that it most likely will not make it to a year without some sort of collection or battery issue. You have to decide for yourself if $500 for 10-ish months of data is a fair price to pay.
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Reviewed in the United States on September 13, 2025 by Josh A.
Smart Ring for the win!
Style: Metallic
Color: Gold
Size: 8
I’ve been wearing the Oura Ring 4 every day, and what stands out most is how seamlessly it fits into my routine without me having to think about it. It’s comfortable enough that I forget it’s on, and the sleep insights have actually helped me notice patterns I didn’t realize were affecting how I feel the next day. The activity tracking feels more realistic than a smartwatch since it doesn’t nag me, but it still gives me a clear picture of how active I’ve been. Battery life has been solid—I only need to charge it every several days—and the gold finish looks more like a piece of jewelry than a gadget. It’s become one of those things I rely on quietly because it gives me useful info without adding any clutter or hassle.
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Reviewed in the United States on September 18, 2026 by Memphis Tigers
Best ring out there, pricey, no real customer support, touchy feely software.
Style: Metallic
Color: Stealth
Size: 11
Really it's a 4.5 stars from me because the software interface is so wordy & cumbersome to navigate. But this brings some science to your sleep. I'm an insomniac--just a night owl in an early bird world, but this ring really helps me improve my sleep. These are great rings. To me rings are superior to bracelets because I work with my hands & power tools so bracelets are out of the question. These are pricey, but good & offer a ton of colors. They offer a ton of sizes. I get it wet, although I take it off to charge when I bathe/shower. I also remove for dishwashing. It can get wet, but eventually that wears them & at the cost, I'm going to keep it as long as I can. I've gotten the stealth twice & love it's matte finish. It can scratch. You can buy thin tape covers if you're worried about that, or take it off for sanding & scrape potential wear. The sensors seem more sensitive from the Gen 3 to Gen 4--less hand falling asleep data during sleep. I switch which hand it's on in my sleep when I roll over most of the time. I started with Motiv ring (bought by Oura,) so I know how good software could be. The Oura software gets annoying--beginning with the subscription. Not cool, only offered monthly, not one time annual fees, uncool. Then there are the updates: they can stop your ring from uploading or syncing at all, so I suggest you stop new software downloads after 2 or 3 upgrades, and back up your data before any download. Why this is critical--I was getting heart surgery & lost ALL my data & neither I nor my doc was able to access it with my last ring, Gen 3. The AI assistant, like most AI these days, is a means for a company of offering ZERO assistance AND not having to pay anyone who might actually help you. The folks answering emails were helpful before the AI. The AI offers a useless loop. I filed tons of questions & complaints & it never escalated to being responded to by a person. Never helpful. Reddit is your only real customer service with Oura. The gen 4 has improvements to the ring: the batteries are NEVER what they claim, 8 days, no way. 5 & change for me. Although this one is lasting longer than my Gen 3 ever did. The sleep data is more sensitive & accurate with this ring. Some of my family calls it the "no duh ring" as in you wake feeling rough, & the ring tells you why--you barely slept. The software interface is a little silly. I don't want any adjectives. I'd just prefer pure data: numbers like REM, Deep Sleep, HR, HRV, RHR, Temp etc.. It's geared toward anxious folks who need cheerleading & advice; I don't want that. If you need that, you'll love this. The entire section on stress is useless to me & mischaracterizes some situations: like happy endorphins for stress; nope! Very few of us can do much about the stress we face, seeing the report is just annoying. Get rid of it. Or let us get rid of it & keep the features we want from that category. And hiding your temp in the readiness section, which is otherwise totally useless...annoying, Woof! I wish we could customize our categories & presentation so I just got #s, and not their numbers--they give you a score for your sleep, activity, HR, & Readiness. Not universal & metrics aren't available so they're as meaningless as their cheers or suggestions. I wish they listed more work outs. And you used to be able to track your heart rate live while exercising. Not anymore. Why not? It's so basic & people loved it. I want to get to a heart rate & hold it over time, increasingly, but don't get that choice now. Lastly if they made their algorithms public to medical institutions, they could be marketed as a tool for sleep studies & HR for cardiology. Either their algorithms are not up to snuff, or they're insecure.
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Reviewed in the United States on July 7, 2026 by a k
Broke but they replaced!
Style: Metallic
Color: Stealth
Size: 9
Not happy that it quit working three weeks after the warranty expired….but we used the AI support and it determined that the ring was not working properly and shipped us a new one!
Reviewed in the United States on September 19, 2026 by Cristi Y.
Best investment I made in years for my well-being!
Style: Metallic
Color: Silver
Size: 8
MI have only been using the Oura Ring 4 for about four months, and it has completely changed the way I understand my body. As a woman, the cycle tracking alone has been incredibly valuable. Being able to see how different phases of my cycle affect my sleep, recovery, stress levels, energy, and overall readiness has helped me make much better decisions about work, exercise, and self-care. Instead of wondering why I feel different from one week to the next, I finally have data that helps me understand what is happening and adjust accordingly. The sleep tracking has been especially eye-opening. I thought I had a decent understanding of my sleep habits, but Oura showed me patterns I would never have noticed on my own. The stress tracking has also helped me become much more aware of when I need to slow down, recover, or prioritize rest before I burn out. I previously used RingConn, and in my experience Oura is on a completely different level. The insights are more meaningful, the app is more polished, and the overall experience feels much more focused on helping you understand and improve your health rather than simply collecting data. I know some people hesitate because of the subscription, but honestly, I think it is absolutely worth it. The value comes from the quality of the insights and the way the information is presented. It has helped me make tangible changes to my daily habits and overall well-being. Only four months in, and I already recommend Oura to all of my friends. It is one of the few health and wellness purchases that has genuinely exceeded my expectations. If you are looking for a wearable that helps you better understand your sleep, stress, recovery, and cycle health, I cannot recommend the Oura Ring 4 highly enough.
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Reviewed in the United States on June 24, 2026 by Grace W.
So far cool....
Style: Metallic
Color: Silver
Size: 9
I got this because I used to wear an Apple Watch and I absolutely hated it because I had to go in my watch pick which workouts I was doing my watch wouldn’t always connect with the phone and I bought the most expensive Apple Watch that you could possibly buy, which is ridiculous I stopped wearing it like four months ago because really I was only wearing it to look at the time it was pretty much useless to me. so I’ve been thinking about getting one of these for several months now I finally able to afford one. They’re very expensive and depending on what color you get is expensive I wanted the gold one however I’m not paying $500 for a ring that I don’t know if I’m going to like anyways so I’ve had it for 24 hours and so far I like it I actually started my monthly the day that I got this ring so that will be nice to track because my month leases are all over the place. This is second monthly I’ve gotten in April so that’s pretty inconvenient lol so that will be interesting to track my period on this. I will give an update with that because it’s very important to me. This is great if you’re trying to conceive, I would definitely recommend this if you’re trying to conceive and if you wanna know why do your own research. I don’t give medical advice so it’s it track my sleep pretty well I actually sleep better than what I thought I did or maybe that was just last night but it takes five days to actually get a reading a OUR a ring reading and how they do it so that’s nice that they take that time to track your sleep and give you a correct reading so it also let you know if you have sleep apnea it will let you know if you get sick before you get sick. It will let you know like you ate too much last night. Maybe that’s why you didn’t sleep good and it just does a lot of really cool things and you don’t have to program anything in the ring you slip it on Bluetooth connected and pay your $68 a year or your $5.98 a month which I feel was pretty inconvenient and a slap in the face by this company because I was told that there was no purchase for an app for this ring so just know you will have to pay for the app no matter what there is no getting around it. You do get 30 days for free to try it out and then after that you will be charged for it so just know that However, I did look up cheaper options and nothing compared to this so if you’re going to buy a ring, buy this one because this is going to give you everything that you need and you know that it’s going to be accurate. Also, they have Asurion insurance that goes with this however I am going to get progressive electronic insurance. You have 30 days after you buy it to get the progressive insurance. It’s better than assurance so progressive does cover stolen items so if you ever get the progressive insurance and you can’t find it. It was probably stolen :::wink wink::you get it? Lol to the_Surgery_Bestie to get a full review on IG for this ring. I will be doing a full on monthly review on this and know this is not sponsored. I paid for this. I got the silver one. It was $349 plus tax so it came out to $371 and some change so we will just say $372 apologies for the long review. I am talk texting and I really wanted to make sure I gave a good review also by the way I am 5 foot tall 170 pounds I thought I would be a size 7 on my non-dominant pointer finger and that was not the case. I am a size 9 on my nondominant pointer finger and I did measure my finger and it said that my pointer finger was 2 1/2 inches around which that seems rather big however that’s what I measure her so I hope that helps somebody with the sizing so you don’t have to order the sizing kit and I did order a cover to go on this. You can go on my Amazon page and see what cover I ordered because I will be giving a review on that as well because I don’t want it to get scratched up. It’s way too expensive to get scratched up.
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Reviewed in the United States on April 28, 2026 by Your Reviewer 👍🏼👎🏼