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OURA

Oura Ring 4 - Silver - 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 Saturday, May 9
Order within 9 hours and 56 minutes
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Color: M - Silver


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: [Proprietary Operating System]


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 Operating System]


Additional Features: Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight


GPS Geotagging Functionality: GPS Via Smartphone


Band Material Type: Titanium


Case Material Type: Titanium


Water Resistance Level: Water Resistant


Human Interface Input: Buttons


Supported Application: Fitness Tracker, Sleep Monitor, Health Monitor, Apple Health, Google Health Connect, Natural Cycles, Flo, Strava


Water Resistance Depth: 100 Meters


Metrics Measured: Body Temperature, Menstrual Cycle, Sleep Duration, Stress


Shape: Round


Style Name: Metallic


Color: M - Silver


Band Color: Silver


Connectivity Technology: Bluetooth


Wireless Compability: Bluetooth


Communication Feature: Bluetooth


Item Dimensions: 0.94 x 0.94 x 0.28 inches


Warranty Type: Standard/Full


Brand: OURA


Target Audience: Unisex Adults


Age Range Description: Adult


Model Number: JZ90-54217-06


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: No Display


Compatible Devices: Smartphone


Compatible Phone Models: Android Devices, iOS Devices


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, May 9

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.

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  • 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

    • ⭐⭐⭐⭐⭐ 5/5 – Game-changer for my fitness and wellbeing
Color: M - Silver Size: 8
Review Image by Caro H
Review Image by Caro H
I work out 5 days a week, and my Oura Ring Gen 4 has been an absolute game-changer for my routine and recovery. The sleep tracking alone has helped me understand how my body actually recovers, not just how hard I train. Seeing my sleep quality, readiness, and recovery metrics every morning has completely changed how I plan my workouts. What really stands out is how seamlessly it tracks my overall wellbeing—from sleep stages and recovery to daily readiness and trends over time. It’s helped me dial in better habits, know when to push hard, and when to prioritize rest. The insights feel meaningful and actionable, not just data for data’s sake. On top of that, it’s comfortable, unobtrusive, and easy to wear 24/7. The battery life is great, it runs easily for about 6-7 days with one full charge, plus it charges pretty quickly. If you’re serious about training, recovery, and long-term health, this ring is 100% worth it. I honestly can’t imagine my routine without it now. 💪 ... show more
Reviewed in the United States on February 28, 2026 by Caro H
    • I love it!
Color: M - 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
    • Amazing data collection… but a very steep price and short life.
Color: M - Silver Size: 12
Review Image by Josh A.
Review Image by Josh A.
Review Image by Josh A.
Review Image by Josh A.
Review Image by Josh A.
Review Image by Josh A.
Review Image by Josh A.
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 by Josh A.

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