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- – Up to 36-month term if approved
- – No impact on credit to apply
- – Instant approval decision
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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.
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30-day returns
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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
Monday, Mar 30
Color: M - Stealth
Size: 6
Features
- OURA MEMBERSHIP - First month of membership is included with purchase, for new members only. Subscription is 5.99/mo afterwards. Or opt for the annual prepaid option for 69.99. Membership is tied to your account via the Oura App, not your physical ring
- 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
- 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: 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
Style: Metallic
Color: M - Stealth
Product Dimensions: 1.06 x 1.06 x 0.31 inches
Item Weight: 6.7 ounces
Item model number: JZ90-54218-06
Batteries: 1 Lithium Polymer batteries required. (included)
Date First Available: October 3, 2024
Manufacturer: Oura
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Mar 30
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.
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Top Amazon Reviews
Color: M - 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.
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Reviewed in the United States on February 19, 2025 by Nicole R.
Color: M - Stealth
Size: 14
I’m a former Apple Watch user and hated wearing the watch as I prefer a more traditional watch. Apple Watch battery life always caused me to miss sleep patterns and it always needed charging in 24 hours. It’s not for me and I also didn’t like working out with a watch on. I ended up rarely wearing the watch After fitting for the ring I went with the stealth black. The battery life has been great and so far I’m getting 7 days. It accurately tracks heart rate and sleep, which were my biggest needs but I love that I can wear it for a week straight without charging. It’s tracks way more like recovery, sleep cycles and vo2 and frankly I’m getting way more out of the ring than I expected. I also wear it when I workout including weights and it’s been unnoticeable to me unlike the Apple Watch. I love the simplicity of a ring and I’m a full convert. As for the monthly fee that some people seem to be mad about, I’m sure there are apps fees most of us are paying for other things but this fee is cheap for what it is. It’s your health after all and it’s worth it. They are also constantly improving the app and older versions of the ring work with these updates. I’m more than happy paying this fee as it’s going to improvements in health metrics (and I’m sure some profits) but it’s worth it to me because the app is very insightful and beyond my expectations. Durabilty also seems great. I’ve showered with it and worked out with barbell right on it and so far there are no scratches As for things I wish it had - The charger is meant for the ring size you buy so you are very limited in charging if you don’t have it. If you lose it you got problems. It’s not ideal but i also don’t know what could be done here There is no portable charger and it feels like a big need. I wish it had an AirPod like charging case for travel. I travel for 2-3 weeks at a time and sure wish I had a portable charger I could get a couple recharges from. They have to be working on this as it seems like a no brainer The silver interior with stealth black I wish was all black but it’s not really noticeable. Not a bud deal
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Reviewed in the United States on October 27, 2024 by James H.
Color: M - Stealth
Size: 14
Great for the first 6 to 8 months. From that point on the battery time became shorter and shorter and shorter. It's just a few days shy of one year and it's totally unusable now. It won't stay charged to even make it through the night. For the last few months I was having to charge it when I got home from work every day so it would make it through the night and the next day and then it got to wear I was having to charge it after work and again in the morning. It would charge up really really fast and run down really really fast eventually getting to the point where I could put it on the charger and take it off right before bedtime and it wouldn't even make it long enough to give me any data the next morning. Battery life went from almost a week to just a few hours in less than a year. Knowing what I know now I would not have wasted my money. I've since bought another brand and there's no guarantee it will last any longer but end of the day I've got $60 tied up not hundreds.
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Reviewed in the United States on January 17, 2026 by tony
Color: M - Stealth
Size: 10
The Oura Ring 4 is sleek, lightweight, and comfortable enough to wear all day and night. Sleep tracking and readiness data feel accurate and genuinely useful, especially once you build a few weeks of history. The Stealth finish looks subtle and doesn’t draw attention. Expensive, but the insights and build quality make it feel worth it.
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Reviewed in the United States on February 4, 2026 by Lucas