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OURA

Oura Ring 4 - Silver - Size 5 - Sleep, Activity, Women’s Health, AI Advisor, Up to 8 Days of Battery Life, Size Before You Buy, Android & iOS Compatible

  • Based on 6,515 reviews
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Availability: Only 1 left in stock, order soon!
Fulfilled by ANR TECH
Arrives May 14 – May 15
Order within 14 hours and 38 minutes
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Style: Metallic


Color: Silver


Size: 5


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 OS


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


Model Name: JZ90-54217-05


Style: Metallic


Operating System: Proprietary OS


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: Waterproof


Sport Type: Fitness


Human Interface Input: Buttons


Supported Application: Fitness Tracker, Sleep Monitor


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: Silver


Band Color: Black


Connectivity Technology: Bluetooth


Wireless Compability: Bluetooth


Communication Feature: Bluetooth


Item Dimensions: 0.91 x 0.91 x 0.28 inches


Warranty Type: Standard


Waterproof Rating: IP54


Brand: OURA


Model Name: JZ90-54217-05


Target Audience: Men


Age Range Description: Adult


Model Number: JZ90-54217-05


Built-In Media: Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide


Wearable Computer Type: Smart Ring


Manufacturer: Oura


Unit Count: 1.0 Count


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: iPhone 14 Pro Max, iPhone 14 Pro, iPhone 14, iPhone 13 Pro Max, iPhone 13 Pro, iPhone 13, iPhone 12 Pro Max, iPhone 12 Pro, iPhone 12, Samsung Galaxy S22 Ultra, Samsung Galaxy S22 Plus, Samsung Galaxy S22, Samsung Galaxy S21 Ultra, Samsung Galaxy S21 Plus, Samsung Galaxy S21, Google Pixel 7 Pro, Google Pixel 7, Google Pixel 6 Pro, Google Pixel 6, all current iPhone models, all current Samsung Galaxy models, all current Google Pixel models


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: May 14 – May 15

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

    • Sleek, Comfortable, and Absolutely Worth It!
Style: Metallic Color: Silver Size: 7
I’m honestly obsessed with my Oura Ring Gen 4 in silver. It’s sleek, lightweight, and fits comfortably without feeling bulky. I initially ordered a size 8, but it was too big, so I exchanged it for a size 7 and it fits perfectly. The durability seems great so far and it’s holding up really well with daily wear. It was very easy to set up, and the app made everything simple and straightforward. I’m right-handed, so I usually wear it on my left hand as recommended, but I can switch it to my right depending on what jewelry I’m wearing that day, which adds nice versatility. The tracking is impressive. My sleep insights feel accurate, and I’ve become more aware of how my rest impacts my energy and stress. Battery life is great, and it charges quickly, so I’m never without it for long. You do need the app and a small monthly membership, but overall it feels like a good value for the money. Highly recommend. ... show more
Reviewed in the United States on March 21, 2026 by TT
    • 1 Month Post Purchase Review
Style: Metallic Color: Silver Size: 5
Review Image by Megin Bailey
Review Image by Megin Bailey
Overall, I love it. I’m gonna break down my review as to why I love it and based on what you’re looking for in a smart ring to determine if this is a good fit for you. First, appearance. It doesn’t look masculine and is fairly scratch resistant. With any jewelry, you’re going to have a little scratching on the underside if you do anything with your hands. There’s plenty of protection options if that’s something you want to look into, but honestly I’ve had minimal scratching and it doesn’t bother me. It fit closer to my actual ring size, but you need to get sized to figure out your actual size. Oura offers a $10 you can order, but I personally just went to Best Buy and got my size off the display there. I believe Target also has sizers in the Oura display. But you do need to get fitted to know if the sensors are at an optimal location for best readings. Next category is App Quality. I really like the app and the reliability of the data it provides. I am not a super intense workout person, so it is perfect for my low impact workouts. I’ve heard people say it doesn’t provide accurate HR readings in higher intensity workouts, I see some improvement for that as you can have it track live HR data. I know a lot of people complain about the subscription and I just want to clarify that because I looked at that myself. The annual subscription is $69.99, monthly is $5.99. You can use the tracker without a subscription, however it gives you very basic data feedback. It tracks the basics, but does not give you pointers for improvement or how to better your scores. With the subscription, you’re not only paying for the insights, but you’re also paying for the access to Oura Advisor, the AI integration that can give even further insights to the data you have logged in app and the feature to simply take a photo of a meal for meal logging. Women’s Health: I personally like it. I have used Apple Health for many many years so it’s my primary for reliability in start dates, but I like the detailed data with Oura. I think with further use of the Oura I might 100% convert to it but for now I can’t decide which I like better. Given my current medical, this is a fantastic tool for me. Tags has been the best way for me to tie symptoms to more probable causes rather than wondering and guessing or assuming. I was most drawn to that feature, but you have to remember to add the tags for it to be most effective. If simple tracking without a bulky smartwatch is more what you’re looking for, this will definitely do that for you but cheaper alternatives can do the same if you’re looking to save some money. If you have more complex medical and want the data insights to your health and be more in tune with your body, you want the Oura ring with a subscription. The good news is that you can actually use an FSA / HSA for both the ring and the subscription. Mine gave me almost no trouble as far as documentation when I purchased them. ... show more
Reviewed in the United States on March 16, 2026 by Megin Bailey
    • Worked for less than a year - out $500
Style: Metallic Color: Silver Size: 8
If I had known it would cost me over $500 to learn these lessons, of course I would not have bought this. It's 1 star on purpose - keep reading. So first of all, honestly, it works amazingly well - if you need it. Numbers come through accurate and complete on so many levels. It's a much smarter location than the wrist. Oh, but be careful about charging - it says 3 days, uh no. Charge it daily as their own documentation says within the app. Yes, that's what THEY tell you to do. Here's the reason for the 1 star: Buying from Amazon. Oura will support their rings for a year or more (I think). Amazon has a 30 day policy and per Oura's web site, if you buy from a 3rd party, their standard coverage is 90 days from Oura. My ring worked flawlessly for 11 months, and then poof - stopped. I contacted Oura who said "yeah, that qualifies for a replacement - who'd you buy it from? Not us you say?" Since it came from Amazon, we had to work with AMAZON return policies, not Oura. To make matters worse, the renewal time on the annual software contract didn't have a warning and renewed AFTER the ring was dead for the NEXT year (remember: broken ring?). When I contacted support (sort of - read on) to see if we could get it back - nope. So 2 years at $75/yr + $365 = $515. Pretty expensive for 11 months! Now we need to talk about support. I, like you, read the reviews of people getting replacements. Well, maybe that WAS the case - before. Now, they're so short staffed on support you can't talk to a live person - period. Chat responded quickly, but has no rights to refund or return or do anything. So you can set an appointment - oh, but there ARE no appointments. So you can call the return number on the order - oh, except the return number is a looped message telling you to go online. In other words - no support at ALL now. So here's my advice. First, if you buy from Amazon, you'd better purchase their warrantee. There's a very high risk that Oura will not help you. Even their own web site says their warranty is only 90 days - so you've been warned. If you buy from them, be ready not to be able to reach anyone if you have problems. Good luck to you. I hope you don't lose as much as we did. ... show more
Reviewed in the United States on January 30, 2026 by De

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