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OURA

Oura Ring 4 - Stealth - Size 6 - Sleep, Activity, Women’s Health, AI Advisor, Up to 8 Days of Battery Life, Size Before You Buy, Android & iOS Compatible

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Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, May 12
Order within 4 hours and 41 minutes
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Style: Metallic


Color: Stealth


Size: 6


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
  • DESIGNED FOR 24/7 WEAR - The updated design of the Oura Ring 4 is more comfortable, fits better than ever, and is water resistant. The first all-titanium smart ring combines exceptional durability with a gentle touch, even for sensitive skin

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: Stealth


Operating System: i_os, android


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


Closure Type: Tang Buckle


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


Shape: Round


Style Name: Metallic


Color: Stealth


Connectivity Technology: Bluetooth


Wireless Compability: Bluetooth


Communication Feature: Bluetooth


Item Dimensions: 1.06 x 1.06 x 0.31 inches


Warranty Type: Standard


Brand: OURA


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


Warranty Description: 1 Year Manufacturer


Battery Cell Type: Lithium Polymer


Battery Average Life: 5 days


Battery Charge Time: 80 minutes


Display Type: Analog


Compatible Devices: Smartphone


Compatible Phone Models: Compatible with iOS and Android devices


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, May 12

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • One month in! It's great!
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.
    • Excellent Support
Style: Metallic Color: Stealth Size: 13
I have had my Oura ring since August 2025 and it has provided great insight to my health and fitness. I love data and the ring provides plenty of it! In the last week, it has been losing battery life quickly and I've been experiencing connection problems. I contacted Oura and via their AI support, my issue was addressed immediately with a confirmation that they would ship me a new ring. Excellent support along with a great product! ... show more
Reviewed in the United States on March 27, 2026 by John O
    • It will fail within months and the extra asurion insurance is a scam
Style: Metallic Color: Stealth Size: 12
When it works, it works well. I had a Gen 3 which stopped working after 7 months. I had bought it direct from Oura and they refused to replace it under warranty and I gave up. I bought Gen 4 from Amazon and took the extra insurance option with assurion. Gen 4 also stopped working after 6 months and Asurion gave me the runaround to replace it offering up one excuse after another - 1. the product isn't registered with us (my response - the policy was sold at the same time concurrently with the product on Amazon so this is incorrect), 2. we are not an Amazon company therefore we would not know what policy is linked to what product (also incorrect because you are SELLING on amazon and the policy was attached and added to the cart at the same time as the product), 3. this has to be handled by a special department which will get back to you (they never did get back) It's a ring, it's fragile, it will fail just from everyday use. It's on your hands which are constantly in movement and hitting things such as door handles, etc. Understand that your product will fail. the extra insurance is a money grab scam. ... show more
Reviewed in the United States on October 28, 2025 by Ho Hum
    • Obsessed!
Style: Metallic Color: 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. ... show more
Reviewed in the United States on February 4, 2026 by Lucas

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