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💍 Own your health, silently and stylishly.
The Oura Ring 4 is a cutting-edge smart ring crafted from titanium, designed for professionals seeking discreet, continuous health monitoring. It tracks over 50 biometric metrics including sleep quality, heart rate, stress, and women’s health, powered by adaptive Smart Sensing technology. With up to 8 days of battery life and 100m water resistance, it fits seamlessly into active lifestyles. Multi-ring support lets users effortlessly switch styles via the app, while the included membership unlocks personalized insights. Ideal for those who want data-driven wellness without the bulk of traditional wearables.




















| ASIN | B0D9WT1S2T |
| Additional Features | Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight |
| Age Range Description | Adult |
| Band Color | Silver |
| Band Material Type | Silver |
| Battery Average Life | 5 days |
| Battery Cell Composition | Lithium Polymer |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 80 minutes |
| Best Sellers Rank | #287 in Electronics ( See Top 100 in Electronics ) #3 in Smart Rings #8 in Activity & Fitness Trackers |
| Brand | OURA |
| Built-In Media | Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide |
| Case Material Type | Titanium |
| Closure Type | Slip On |
| Color | Silver |
| Communication Feature | Bluetooth |
| Compatible Devices | Smartphone |
| Compatible Phone Models | Android Devices, iOS Devices |
| Connectivity Technology | Bluetooth |
| Controller Type | Ring |
| Customer Reviews | 4.0 out of 5 stars 9,230 Reviews |
| Display Type | No Display |
| GPS | GPS Via Smartphone |
| GPS Geotagging Functionality | GPS Via Smartphone |
| Human Interface Input | Unknown |
| Item Dimensions | 1.06 x 1.06 x 0.28 inches |
| Item Dimensions D x W x H | 0.28"D x 1.06"W x 0.28"H |
| Item Weight | 180 g |
| Manufacturer | Oura |
| Metrics Measured | Body Temperature, Menstrual Cycle, Sleep Duration, Stress |
| Model Name | Oura Ring 4 |
| Model Number | JZ90-54217-10 |
| Operating System | iOS, Android |
| RAM Memory Installed | 16 MB |
| Shape | Round |
| Special Feature | Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight |
| Style Name | Metallic |
| Supported Application | Fitness Tracker |
| Supported Satellite Navigation System | GPS |
| Target Audience | Unisex Adults |
| Warranty Description | 1 Year Manufacturer |
| Warranty Type | Standard/Full |
| Water Resistance Depth | 100 meters |
| Water Resistance Level | Water Resistant |
| Wearable Computer Type | Smart Ring |
| Wireless Communication Standard | Bluetooth |
| Wireless Compability | Bluetooth |
A**K
Best ring out there, pricey, no real customer support, touchy feely software.
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.
A**R
Lasted 1 year
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!
J**.
Amazing data collection… but a very steep price and short life.
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.
G**.
Best investment I made in years for my well-being!
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.
M**S
Smart Ring for the win!
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.
J**W
Smart ring useful for tracking some health stats, but many you may already have on your phone.
This version of the Oura works OK, but I probably won't renew my subscription. I purchased this mostly to track my sleep. I'm not a runner or much of an athlete these days, and all of my exercise tracking can be handled by my phone and watch for the most part, but they need to be re-charged daily, so I can't really track my sleep unless I want to carry around multiple chargers. I thought the ring would solve this issue, and for the most part it does. Sleep tracking is accurate for the most part, but since I frequently nap or have my sleep interrupted by life, the ring doesn't always pick up on my catnaps or understand that I went back to sleep later in the night. My main issue with the ring is the comfort. The ring sizer said I was size 11, but the sizer and the ring are not made of the same material, so I would recommend getting a half size larger, if that were possible. The ring is also thicker than many rings so I find it annoying between my fingers. I rarely forget that it's there, and I frequently find myself fiddling with it during the day. Setting up the charger is needlessly finicky in my opinion, since you have to line up the dimple with the light on the charger or nothing happens. Fortunately the LED lights up when you get it right, but it's slightly delayed. This is a minor issue, since you get used to the process soon enough. I really despise proprietary chargers. My other complaint is the lack of notification about the battery level. I think twice I went a couple of days with a ring that had no charge and didn't notice it, so I lost those days' data. Maybe this is a me issue and not an Oura issue, so I may have to look into changing the settings somewhere. This would be a better product with a longer battery life and a thinner band. It does track my sleep well enough, but it seems like a lot to pay for the subscription if that's the only feature I'm using. Another issue is one I had with a smart band I had previously and returned. You have to look at your phone to find out anything, and once you're on your phone you have all the other distractions at hand. If the lights on the inside of the ring could be used for information, this might be a better choice for me.
A**K
I love it!
I don't like wearing wrist watches, so having a smart ring is PERFECT for me! I love how durable it is, it's easy to clean, and the app that comes with it is GREAT! The tracking on this thing is flawless and it uses light sensors to track my vitals, so it doesn't even feel like a smart device, just a regular ring! It also charges very quickly, so if I'm using the bathroom or taking a shower at home, I just pop it on the charger for 10-15 minutes and it's good for a few days! I only do it daily just to establish a good routine, and I have forgotten before and let the battery get low, but still haven't had the power die on me yet! I can see it being an issue for lifting weights since it's coated in stainless still and a little bulky, but otherwise very comfortable for other forms of exercise! I can also see it being a problem because of the red and green light sensors at night, it might be disruptive to light sleepers in a dark room, but I just keep my hands under my blankets or pillows, and I sleep just fine! It doesn't light up all the time, just periodically throughout the night. If the tiny lights at night might bother you, you can probably put a thick sock or a glove over your hand at night to block the light. I'm personally not inconvenienced by it at night, and I like that I can't feel anything when it checks my vitals (heart rate, blood oxygen, temperature, just to name a few). I wound up subscribing to the app anually because I really liked how easy it was to set up and how thorough its analysis was for my overall health. UPDATE: Recently I noticed the ring was draining too fast between charges and I actually needed to charge it everyday! I reached out to customer service via the app, they asked a few questions, and shipped me another one immediately! It was refurbished, not brand new, but it works like new and I would never have known the difference if they didn't tell me! I keep the old one as a backup just in case since they said I don't need to send it back. I basically haven't stopped wearing the Oura ring since I put it on, and I've used it on long walks, swimming (fully submerged in water), and for general daily activities and it works great! I wash it with soap and water when I wash my hands and take it off to give it an.wxtra good wipe down before popping it on the charger or putting it back on!
J**E
Read this first and Think twice before buying this ring…
I bought this ring mid-February 2025 along with the extended warranty. I just received my second replacement yesterday (end of November 2025). I really wanted to give it a 5 stars, but I cannot. I can’t comprehend why Oura Ring 4 has so many issues. I only use it for sleep and wear it during the day. I do not take a shower with it, nor do I wash dishes with it either. Seriously, I just received my 3rd ring in 9 months. The other 2 are useless (not connecting to the smart phone, not charging) that is why I contacted the help center of Oura Ring. I have to say that Customer Service is Amazing at Oura: they are quick to reply, analyze and provide a replacement after they checked if you are eligible. My 2 replacements rings arrived straight from the Netherlands in about a week later after their shipping date. I bought this ring to track my sleep patterns and heart rate, etc. When the ring works it is great and the app that goes with it is wonderful with clear stats. I just ended up buying another smart device to help me check my sleep patterns, etc. It is one of those things that I was so excited to have this ring until it failed, not just once, but twice. I would not recommend it now that I needed a second replacement. 3rd time might be the charm, I might not know much how long it will work as I plan to compare the results of the new ring and my other smart device by wearing them at the same time for couple nights. After that, the Oura ring will be in its box. I hate to give hard review, but this is my experience and I wanted to let you know about it and let you decide if it is something worth trying or not.
D**A
Nice
Delivery took longer than expected, but i am happy with the ring. It does exactly what they advertise. Its a nice to have.
A**S
Top, je suis vraiment contente de mon achat.
Top, je suis vraiment contente de mon achat🤩
U**A
Najlepszy
Najlepszy tracker samopoczucia i dobrostanu
C**L
Great insights on sleep
I’ve only used it for a week so I haven’t gotten the full insights it can offer, but the Oura ring 4 has been great so far. I bought it primarily to track my sleep, and it’s fascinating to track the quality of my sleep each night.
T**A
Padrísimo…
Increíble gran compra …
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