Oura Ring 4 - Silver - Size 13 - Sleep, Activity, Women’s Health, AI Advisor, Up to 8 Days of Battery Life, Size Before You Buy, Android & iOS Compatible
Condition: New
Buy Now, Pay Later
As low as
/ mo
Learn more
- – Up to 36-month term if approved
- – No impact on credit to apply
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
30-day returns
Learn more
FREE 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.
View our full returns policy here.
Availability:
In Stock.
Arrives
Friday, Jul 3
Style: Metallic
Color: M - Silver
Size: 13
Features
- 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.
Operating System: Proprietary (Oura)
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
Style: Metallic
Color: M - Silver
Operating System: Proprietary (Oura)
Additional Features: Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight
GPS Geotagging Functionality: GPS Via Smartphone
Band Material Type: Stainless Steel
Case Material Type: Stainless Steel
Water Resistance Level: Water Resistant
Sport Type: Fitness
Human Interface Input: Touchscreen
Supported Application: Fitness Tracker
Water Resistance Depth: 100 Meters
Supported Satellite Navigation System: GPS
Controller Type: Ring
Metrics Measured: Body Temperature, Menstrual Cycle, Sleep Duration, Stress
Closure Type: Slip On
Battery Cell Type: Lithium Polymer
Battery Average Life: 5 days
Battery Charge Time: 80 minutes
Display Type: No Display
Compatible Devices: Smartphone
Compatible Phone Models: Android Devices, iOS Devices
Warranty Type: Standard
Waterproof Rating: IP53
Brand: OURA
Target Audience: Unisex Adults
Age Range Description: Adult
Model Number: JZ90-54217-13
Built-In Media: Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide
Warranty Description: 1 Year Manufacturer
Wearable Computer Type: Smart Ring
Manufacturer: Oura
Shape: Round
Style Name: Metallic
Color: M - Silver
Band Color: Black
Connectivity Technology: Bluetooth
Wireless Compability: Bluetooth
Communication Feature: Bluetooth
Item Dimensions: 0.91 x 0.91 x 0.31 inches
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Jul 3
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
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
Similar Products
![Apple Watch SE (2nd Gen) [GPS 40mm] Smartwatch with Starlight Aluminum Case with Starlight Sport Band S/M. Fitness and Sleep Trackers, Crash Detection, Heart Rate Monitor, Retina Display](https://m.media-amazon.com/images/I/61umEhyV-UL._AC_US500_.jpg)
Top Amazon Reviews
Style: Metallic
Color: Silver
Size: 8
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!
...
show more
Reviewed in the United States on June 13, 2025 by Allison K
Style: Metallic
Color: Gold
Size: 8
I’ve been using the Oura Ring 4 daily, and I’m very impressed with its design and functionality. It’s lightweight, comfortable to wear all day, and doesn’t feel bulky at all. The health tracking features are very detailed, especially sleep and activity insights, which have helped me better understand my daily habits. The app is easy to use and provides clear information. The finish in gold looks elegant and high quality. One important thing is to make sure to measure your size correctly before purchasing, as the fit is very important for comfort and accuracy. Overall, I’m very satisfied with this smart ring and would definitely recommend it for anyone interested in health tracking in a minimal and stylish form.
...
show more
Reviewed in the United States on June 2, 2026 by yenier yera
Style: Metallic
Color: M - 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.
...
show more
Reviewed in the United States on September 13, 2025 Reviewed in the United States on September 13, 2025 by Josh A.
Style: Metallic
Color: Rose Gold
Size: 9
I got this Oura ring for my wife for Christmas this past year and she loves it as well as the rose gold color. It's a very good way to take control of your sleep and improve sleep quality. The ring tracks your sleep down to the minute, is crazy accurate, and works with an app that, once installed, works offline and connects to the ring through Bluetooth. Every morning you can get a full breakdown on the app of your sleep pattern for the night including sleep stages (light, REM, deep), heart rate, heart rate variability, body temperature, respiratory rate, total sleep vs time in bed, your sleep efficiency, your "body clock" and even "sleep debt" (which tracks how much sleep you're getting vs how much you need for your body type). It also tracks the menstrual cycle for women, which my wife uses and likes a lot. She's been able to figure out a pattern based on her heart rate that happens the day before her period actually starts, which works every time - super cool! Of course it does other things like tracks your steps, exercise, you can log your meals etc. Too many things for me to include in this review. The ring fits my wife's finger perfectly. Before you buy you have to purchase the ring sizing kit, which is cheap, and you can use it for friends if you refer people (which you can get awarded for monetarily). The sizing is pretty easy, wear one of the sizers for a day and make sure it's comfortable and then order your ring. I've also seen the ring sizing kits on display in places like Costco or Best Buy, so that's another option without having to buy the kit. The battery lasts about a week, which is pretty good. And it charges in less than an hour, sometimes half an hour if she's charging it more regularly than a week (which your supposed to do). My own Oura Ring 4 is over a year old and I have to charge it every 2-3 days. I admit, I did not follow their recommendations for maintaining the best battery life, so can't complain there. Overall, Oura Ring is fantastic and I'd highly recommend it to anyone. My wife and I have both been able to improve our overall sleep quality since using them. They are a very good tool for that if you want to prioritize sleep in relation to health (which anyone should).
...
show more
Reviewed in the United States on February 20, 2026 by Keith
Style: Metallic
Color: Stealth
Size: 9
I've been wearing the oura ring gen 4, stealth, size 9 for exactly one month now. First off, sizing. I was between sizes 9 and 10. I opted for the smaller size using this little test: Using the plastic ring sizes, if you cannot take off the ring in the morning when your fingers are puffiest, and the only way to do so is by wetting your finger to add some slippage, then that's the right size. With the bigger size, I was able to take off the ring in the morning without using water so I felt that size was too big. One month later, I am glad I went with the smaller size. No discomfort and still using water in the morning to take off the ring before I shower. Comfort I wear it on my right index finger. I did not like in between fingers, which is the reason I wear a silicone wedding band. But overall, it's not very intrusive. It's annoying to write with a pen or pencil but that's not often. Appearance I love the stealth color. Already got a few scratches on my palm side, which is a little annoying. But I tell myself that at least the back of my hand, the ring looks like new. I use these silicone protectors when working out with weight and it does a great job. The scratches came from handling things where I should have taken off my ring. I wish there were some way to make the scratches less visible as these scratches you see a shiny silver metal which contrasts a lot! Battery No issues. I charge it every few days or so while I shower. I am manually trying to keep the battery at between 25% and 75% but most often I forget that I left it charging and it goes back to 100%. Sleep Tracking I'm not a power user. I enjoy checking in the morning my sleep score and compare it to how I thought my sleep went the night prior. Pretty accurate sleep tracking in my opinion. Fitness Tracking. So we all know that the step counter is way off so I don't really care about that. However, the ring really is good at spotting fitness "events" and I love that when opening the app, there's a backlog of events that you have to confirm the type of activity. My top three are: housework, walking, and HIIT. The app gets better at recognizing the events so most times I am just confirming instead of categorizing. Overall, this level of tracking is simply encouraging me to be more active, which has lead to a good impact on my health. Overall, pretty satisfied with the ring. Glad I got it.
...
show more
Reviewed in the United States on February 19, 2025 by Nicole R.
Style: Metallic
Color: M - Silver
Size: 13
I purchased a rind 1.5 years ago and have used it every day since. Here is what I love about it: 1) Great insight into your basic health metrics and the app is easy to understand and provides helpful reporting. 2) looks great and is much more comfortable to sleep with than a watch. 3) allows me to wear an analog watch and still track movement and steps, as well as all health functions. 4) great battery life for the fist year, 5) great build quality. I train with weights daily and regularly hike, backpack and even took it for a 3 week through hike of the VT Long Trail with no issues or damage to the ring. Neutral: 1) size is a bit much and can feel a bit big on my finger, I don't wear jewelry so that could be why, 2) I have to take it off to do pull-ups, deadlifts or anything where the ring compresses against the bar. Not just because the ring could get damaged but also because the pressure digs the ring into my finger and it can be painful or get in the way of my grip. 3) charging is a bit slow 4) fitness tracking even with my iphone connected for tracking my location and movement is fairly poor compared to my garmin GPS watch. This is probably to be expected but for those of you thinking about using this as your sole fitness tracking system I would think twice. Milage is consistently off (lower) then using my Garmin Enduro. Negatives: 1) Biggest issue: The battery life slowly dies. When I first got the ring I could go 5-6 days between charges, now at 1.5 years I'm charging it every other day. At $400 for the ring I would expect better battery longevity. 2) I didn't find much use for Symptom Radar. It tended to make me paranoid rather than providing useful data. Not once when it provided an alert did I get sick and it gave me a ton of false positives like when I came home after an overnight flight, had a few too many drinks, ate too much before bed, etc. I eventually turned it off and haven't missed it at all. Overall I still love my Oura ring and it would amazingly with my iPhone. After a year and a half of daily use (it only comes off to charge) the ring still looks great.
...
show more
Reviewed in the United States on May 20, 2026 Reviewed in the United States on May 20, 2026 by Peter
Style: Metallic
Color: M - Stealth
Size: 11
I purchased this ring somewhat on a whim, but it has quickly become one of the wearable devices I use every day. What initially started as a curiosity has turned into a valuable tool for monitoring my overall health and wellness. I particularly enjoy the health insights and biometric data it provides, which help me stay more aware of my daily habits and well-being. The companion app is intuitive, easy to navigate, and presents information in a way that is both accessible and actionable. One of my favorite features is the ability to take a photo of my meals and have the app identify and log the food. This functionality makes tracking nutrition much more convenient and has encouraged me to be more mindful of my eating habits. I know some users may hesitate because of the annual subscription fee, but for me it has not been an issue. I was able to use my HSA funds to purchase the ring, and I also use my HSA account to cover the subscription cost. Given the value I receive from the health tracking, insights, and convenience of the app, I believe the ongoing cost is justified. Overall, I am very pleased with this purchase and would recommend it to anyone looking for a user-friendly health and wellness wearable.
...
show more
Reviewed in the United States on May 29, 2026 by Gustavo Sanchez
Style: Metallic
Color: Brushed Silver
Size: 9
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.
...
show more
Reviewed in the United States on November 30, 2025 by Julie