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💍 Elevate your wellness game—wear the future on your finger.
The Oura Ring 4 in silver is a cutting-edge wearable ring designed for professional millennials seeking holistic health tracking. It offers advanced biometric sensors to monitor heart rate, sleep quality, body temperature, and activity levels with clinical precision. Featuring a sleek, lightweight design and over 7 days of battery life with wireless charging, it integrates seamlessly with a dedicated smartphone app for personalized health insights. The included sizing kit ensures a perfect fit, making it an essential smart accessory for those who value data-driven wellness and style.






















| ASIN | B0D9WV7R98 |
| Age Range Description | Adult |
| Band Colour | Silver |
| Band Material Type | Stainless Steel |
| Battery Average Life | 8 days |
| Battery Capacity | 336 |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 80 minutes |
| Battery capacity | 336 |
| Battery cell composition | Lithium Polymer |
| Best Sellers Rank | 336 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 1 in Wearable Tech Rings |
| Box Contents | Information Booklet, Oura Ring 4, Oura Ring 4 Charger, Quick Start Guide, USB-C Cable |
| Brand Name | OURA |
| Case Material Type | Titanium |
| Closure Type | Slip On |
| Colour | Silver |
| Communication Feature | Bluetooth |
| Compatible Devices | Smartphone, Tablet |
| Compatible Phone Models | all current smartphone models |
| Connectivity Technology | Bluetooth, USB |
| Connectivity technology | Bluetooth, USB |
| Controller Type | Ring |
| Country of Origin | Estonia |
| Customer Reviews | 4.2 out of 5 stars 6,912 Reviews |
| Display Type | No Display |
| GPS Geotagging Functionality | No GPS |
| Human Interface Input | Unknown |
| Item Dimensions | 25 x 25 x 8 millimetres |
| Item Dimensions D x W x H | 25D x 25W x 8H millimetres |
| Manufacturer | Oura |
| Metrics Measured | Heart Rate Monitor, Sleep Duration Monitor, Stress Monitor |
| Model Name | JZ90-54217-15 |
| Model Number | JZ90-54217-15 |
| Operating System | Proprietary/Custom |
| Operating system | Proprietary/Custom |
| Product Features | Advanced Health Tracking |
| Shape | Round |
| Sim Card Size | eSIM |
| Special feature | Advanced Health Tracking |
| Style Name | Minimalist |
| Supported Application | Apple Health, Google Health Connect, Natural Cycles, Flo, Strava |
| Supported Satellite Navigation System | GPS |
| Target Audience | Men |
| Warranty Type | Lifetime |
| Water Resistance Depth | 50 Metres |
| Water Resistance Level | Water Resistant |
| Waterproof Rating | IP54 |
| Wearable Computer Type | Smart Ring |
| Wireless Compability | Bluetooth |
| Wireless communication standard | Bluetooth |
L**S
Great Product
Great Product does the job on tracking sleep, heart rate, movement etc. Very easy to set up and get going. Would recommend for those that do not want to wear a smart watch.
M**D
So So Happy!
I hesitated for a while before investing in this gadget. And I love my Gadgets! but after doing some homework on the competition, I decided to jump for it. First, the fit and metal colour are great, I couldn't be happier, the quality and durability is insane, i do everything with it, I rarely take it off. The connectivity to my Samsung Z Fold6 was flawless, no hiccups, plus, everything you open the app, it updates in no time. so great compatibility. Now, you need to give it time to gather data about you, of course... it will not happen overnight which is quite right, but the intel you get afterwards is great. Your body age, sleep quality, energy available, your stress, it is such a great little ring. it is a lot of money for such a small device but the value for money is worth it. I highly recommend it if you are curious and want to be nudge in the right direction for better health.
L**N
Great item, very efficient at tracking
I love this ring, it does everything and more that you could ever want from a fitness tracker. It also works really well alongside your Apple Watch. I would highly recommend and it was sent to me within 24 hours.
L**A
Please don’t waste your money!
Don’t waste your money!! I have had mine 4 months and the battery is draining fast!! A very expensive piece of crap in my opinion. You also have to pay a subscription which is ridiculous!! If you want to track your health get a watch. I got conned into getting this to take my temperature, the way it is going it won’t even work in a months time and I’ll have to fork out more money! You also have to buy ring covers every month because it gets scratched very easily and it just looks like an eyesore the covers don’t last very long either!
A**R
Expensive but good value!
Really impressed, it's been tracking my sleep and helping manage my diet and exercise. It's comfortable and pretty stylish. The app is easy to use and doesn't bother me all the time with ads or useless notifications. It's very expensive and having to pay a subscription isn't the best but I think it's pretty good value for the technology in it. It was really easy to set up and hasn't had any connection drop outs or other issues. I'm a little concerned that the next ring will not be compatible with my current charger or case if I decide to get one. I hope it will be but the 3rd gen isn't compatible with 4th so that's something to know if you're buying in a few years and the 5th gen is due out. Hopefully I'm wrong and backwards and forwards compatibility won't be a problem. I like the idea of being able to give friends a discount link right from the app but it would be better if I got a month of my subscription free if they buy. I much prefer this form factor to a watch but you do give up easy heart rate monitoring so maybe a widget that can be pinned to a phone screen or even a small screen on the ring would be something cool to add in the future. Blood pressure monitoring would also really be a cool thing to add but that might not be possible. One other thing to keep in mind if you are buying is it really needs a lot of data to get the most out of it so for the first couple of weeks to a month it won't give you all the readings. In conclusion, I love it, I'm really pleased with the fit and the colour I chose. The app is great and I wish I'd had one years ago. Very happy customer.
L**D
Excellent product, limited durability.
Excellent product, but oh my lord does it scratch easily! I've had mine for a few weeks now and it's is absolutely covered in scratches!
S**E
⭐️⭐️⭐️⭐️⭐️ Game-Changer for Chronic Illness & Neurodivergent Wellness Tracking
I discovered the Oura Ring 4 through the Clue period tracking app, and it’s been a total game-changer. I live with Chronic Fatigue Syndrome, Fibromyalgia, and AuDHD, and I was looking for something that could help me track sleep, stress, body temperature, and recovery. Oura delivers on all fronts—and then some. What I love most is the accuracy and depth of insight. It doesn’t just give you only the minimal data, like Deep, Light and REM sleep, but also things like how long it takes you to get to sleep (latency) and how restless you are —it then translates this into genuinely helpful feedback, like sleep and recovery scores, body temperature trends, and guided breathing for stress. The daily readiness score helps me pace myself, which is essential when managing fatigue and sensory overwhelm. The breathing and mindfulness sessions have been a great tool during flare-ups or overstimulation. A few things to note: There is a monthly app subscription, but it’s reasonably priced for what you get. I also got a month free when I signed up. The app is intuitive and easy to navigate, though some people might need a bit of time to explore all its features—there are a lot, and they’re all useful. It takes about 90 days for Oura to fully calibrate and understand your individual baseline, so the insights get better over time. Buying the sizing kit first is a MUST—you’ll want a good fit for accuracy and comfort. Tagging activities and meals is super simple (if you remember to do it). The Rest Mode is a thoughtful feature for days when you’re sick, in pain, or recovering, though I do wish stress tracking stayed active during this mode. Battery life is solid, syncing is quick, and the ring itself is lightweight and comfortable—even with sensory sensitivities. It also integrates beautifully with Clue for cycle tracking, which adds another layer of helpful data for me. If you're managing chronic illness, neurodivergence, or just want a deeper, more holistic view of your health, I can’t recommend the Oura Ring 4 enough. It’s not just about fitness—it’s about understanding your body, honoring your limits, and supporting your wellbeing.
T**P
A great tool which does exactly what it says.
The app is brilliant. It takes a while to get to know you, so don't expect instant insights, but as it builds a picture it is really good at telling you what's going on. I am using it to track my food etc as well, so not exclusively related to what's happening on the ring. On the ring specifically? Well, it is chunkier than a ring you'd buy as jewellery. That's ok and it's not ridiculous, but you have to get used to it. I do find I take it off and put it on more, or change fingers, as my hand needs a rest. The colour... Despite the name stealth, does stand out. If you want something more subtle then brushed or silver is probably better, as it's more like typical jewellery. That being said, I've gotten used to it. Sizing - definitely get the sizing kit and wear not for a few mins but for a day or two to understand how your fingers change size. Battery life is good. I reckon 8 charge it once every 4 otlr 5 days so far. I understand turning off blood oxygen measuring is the way to really eek out more battery life. You can also use airplane mode to reduce how often it speaks to your phone. But yeah, no regrets, it's a great tool and honestly, easier to live with than a smart watch.
Trustpilot
2 days ago
3 weeks ago