Specifications
- Operating System CompatibilityApple iOS, AndroidBuilt-in Storage0 gigabytesMetrics MeasuredActivity vs. inactivity, Blood oxygen, Hours slept, Calories burned, Resting heart rateProtective QualitiesWater resistant, Dust resistantMaximum Depth of Water Resistance328 feet
- Key Specs
- Operating System Compatibility: Apple iOS, Android
- Built-in Storage: 0 gigabytes
- Metrics Measured: Activity vs. inactivity, Blood oxygen, Hours slept, Calories burned, Resting heart rate
- Protective Qualities: Water resistant, Dust resistant
- Maximum Depth of Water Resistance: 328 feet (Measurement of the maximum depth of water in which the product is able to resist some degree of water penetration.)
- General
- Brand: Oura
- Model Number: JZ90-54218-09
- Product Name: Oura Ring 4 - Smart Ring - Size Before You Buy with Oura Ring 4 Sizing Kit - Size 9
- Color: Stealth
- Product Type: Activity tracker, Activity tracker
- Form Factor: Ring (The size, arrangement, and physical configuration of the product.)
- Model Family: Oura Ring 4
- Year of Release: 2024
- Design
- Ring Size: 9
- Ring Size System: US
- Display
- Display Screen: false
- Compatibility
- Operating System Compatibility: Apple iOS, Android
- Connectivity
- Wireless Connectivity: Bluetooth (The manner in which a device sends data to another device over a short distance without the use of wires or cables.)
- Features
- Built-in Storage: 0 gigabytes
- GPS Enabled: false
- Activity
- Metrics Measured: Activity vs. inactivity, Blood oxygen, Hours slept, Calories burned, Resting heart rate
- Performance
- Protective Qualities: Water resistant, Dust resistant
- Maximum Depth of Water Resistance: 328 feet (Measurement of the maximum depth of water in which the product is able to resist some degree of water penetration.)
- Dimensions
- Product Height: 0.7 inches (The out of box height of the item. Height is measured as the vertical distance from the bottom of the item to the top as it would be primarily used or placed.)
- Product Width: 7.9 inches (The out of box width of the item. Width is measured as the horizontal distance from one side of the item to the other as it would be primarily used or placed.)
- Product Weight: 4.2 ounces (The out of box weight of the item.)
- Product Length: 2.88 inches (The out of box length of the item. Length is measured as the longest dimension of the item.)
- Power
- Rechargeable: true
- Charging Interface(s): USB-C (The connection for transmitting power to charge the device.)
- Warranty
- Warranty - Parts: 1 year
- Warranty - Labor: 1 year
- Other
- UPC: 6430060153530
Oura Ring 4 brings you closer to what matters most — your health. With an updated all-titanium design, this smart ring features Smart Sensing, a new sensing platform that doesn’t just measure your biometrics but also adapts to you. It provides insights into over 30 biometrics including sleep, readiness, activity, heart health, stress, metabolic health and women’s health.
- Oura Membership: First month of membership is on us with your purchase, $5.99/mo afterwards. Offer available to new members only. Take advantage of the annual prepaid option for $69.99. Membership is tied to your account accessible via the Oura App, not your physical ring.
- Size Before You Buy: Order an Oura Ring 4 Sizing Kit, or visit a Best Buy store, to find your optimal size, then return to BestBuy.com to buy your Oura Ring 4.
- Accuracy - Smart Sensing: Oura tracks over 30 biometrics, including sleep, activity, stress, heart health, and women’s health metrics. Oura Ring 4 is powered by Smart Sensing, which adapts to your unique finger and activity — delivering accurate, continuous data, day and night.
- 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 — you’re free to forget it’s on. Until you start getting compliments.
- Designed For 24/7 Wear: The updated design of 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.
- Sleep: Get the best sleep of your life, and then some. Wake up to in-depth sleep analysis, so you can improve your habits and transform how you feel. Oura provides insights into your sleep staging throughout the night, blood oxygen levels, HRV and nighttime heart rate.
- Readiness: Know when to push it and when to take it easy with the Oura Readiness Score. It takes into consideration over 30 different body signals — including temperature, heart rate, HRV, and sleep — to tell you how ready you are for the day ahead.
- Activity: Whether you're running a marathon or running errands, Oura tracks your daily activity, steps, calories burned and workouts while helping you strike a balance between movement and recovery.
- Metabolic Health: Learn how to fuel your wellbeing. See a nutritional breakdown of your meals, understand your meal timing and understand how what you eat impacts your holistic health.
- Heart Health: From monitoring your daily heart rate and HRV to discovering your Cardiovascular Age and Cardio Capacity, Oura helps you take care of one of the key indicators of your overall health — your heart.
- Women's Health: Your cycle impacts your mood, sleep, activity and more, every day. Oura helps you understand how your cycle affects your body, so you can make better, informed decisions about your holistic health. Track the changes in your body throughout your cycle and predict your period up to 30 days in advance.
- Stress: Oura will help you identify signs of stress and understand how well your body handles it. You'll know when you need to incorporate more self-care practices and how to recover from long term stressors.
- Stress Resilience: Stress Resilience visualizes how well your body withstands stress over time and helps you build resilience to get through life’s challenges. A healthy amount of stress, sleep, and recovery keeps you prepared for whatever comes your way.
- HSA/FSA Compatibility: You may be eligible for reimbursement on your Oura Ring purchase. You can submit your Best Buy confirmation email to your FSA or HSA provider as proof of purchase.
- App Compatibility: Automatically sync your health and workout data from your favorite apps through Apple Health, Google Fit, Health Connect, Strava, and Natural Cycles.
- iPhone and Apple Watch Compatibility: Get your Oura data at a glance from your iPhone or Apple Watch with iOS widgets and Apple Watch complications. You can also access a companion version of the Oura App on your Apple Watch.
- Android Compatibility: The award-winning Oura App is compatible on Android devices running Android 8.0 and higher with Google Play services. The device must also support Bluetooth 4.0.
- Language Availability: iOS and Android apps available in English, Finnish, Japanese, German, French, Spanish, Italian, Norwegian, Danish, and Swedish. Supports metric and imperial units of measurement.
Whats Included
- Oura Ring 4 - Smart Ring - Size Before You Buy with Oura Ring 4 Sizing Kit - Size 9
A: You get the membership for the first month for free just for buying the ring. If you choose not to renew you only are able to access sleep, readiness, and activity scores. You won’t get access to the symptom radar, stress insights or other features. I’m not even sure if without the membership if you can access the details of your sleep or it’s just a score. Hope this helps!
Q: Does the black get scuffed or scratched easily?
A: I have the 3 in black have not had it a year and it is all scratched up. It looks horrible. I hope the 4 is made better
A: I read one review - can't remember where now, maybe thewirecutter.com - that said it hurt the reviewer's hand to wear while lifting, but was recommended otherwise. Regarding scratch protection, there are a ton of silicon covers available from third parties.
Q: What finger do you need to wear the ring on.
A: The website says that it can be worn on any finger but for the most accurate data, wear it on your pointer, middle, or ring finger of either hand.
Q: what is the difference in Ora Ring 3 vs 4?
A: Longer battery life, a bit thinner and more comfortable. I find it harder to keep in the correct orientation without the sensors on the inside.
Q: Can you get a trade in for a new Oura ring?
A: I went in today with the same ring and they offered me $22, Hope that helps!
Q: Can you get sized at any Best Buy store? Also, can you purchase this with a HSA account?
A: Not sure about sizing at Best Buy, I ordered a sizer and it came In 2 days. It was nice to be able to wear the sizer around for a couple days to ensure correct size. The oura website says HSA/FSA eligible
Q: Does it come with a charger?
A: Yes it does come with charger and cable
Oura Ring 4 - Smart Ring - Size Before You Buy with Oura Ring 4 Sizing Kit - Size 9 - Stealth
Ring Size
9Color
Stealth
Compare similar products
$399
Oura Ring 4 brings you closer to what matters most — your health. With an updated all-titanium design, this smart ring features Smart Sensing, a new sensing platform that doesn’t just measure your biometrics but also adapts to you. It provides insights into over 30 biometrics including sleep, readiness, activity, heart health, stress, metabolic health and women’s health.
$10
Oura Ring 4 sizes are slightly different from standard ring sizes, so it is important to size yourself using our tools and to follow our sizing instructions. The Oura Ring 4 Sizing Kit allows for you, and those around you, to find the ideal fit before purchasing. You can also size yourself in stores where there is an Oura Ring 4 display. A properly fitting Oura Ring will result in the highest possible data accuracy, comfort, and overall experience.
$399
Oura Ring 4 brings you closer to what matters most — your health. With an updated all-titanium design, this smart ring features Smart Sensing, a new sensing platform that doesn’t just measure your biometrics but also adapts to you. It provides insights into over 30 biometrics including sleep, readiness, activity, heart health, stress, metabolic health and women’s health.
$399
Oura Ring 4 brings you closer to what matters most — your health. With an updated all-titanium design, this smart ring features Smart Sensing, a new sensing platform that doesn’t just measure your biometrics but also adapts to you. It provides insights into over 30 biometrics including sleep, readiness, activity, heart health, stress, metabolic health and women’s health.
| Pros for Oura Ring 4 - Smart Ring - Size Before You Buy with Oura Ring 4 Sizing Kit - Size 9 - Stealth | |||
|---|---|---|---|
| Sleep tracking, Battery life, Comfort, Accuracy, Design | Comfort, Accuracy, Sizing kit, Easy to use, Build quality | Sleep tracking, Battery life, Comfort, Accuracy, Design | Sleep tracking, Battery life, Comfort, Accuracy, Design |
| Cons for Oura Ring 4 - Smart Ring - Size Before You Buy with Oura Ring 4 Sizing Kit - Size 9 - Stealth | |||
| Subscription, Scratches easily, Sizing, Price | Size, Delivery method, Grippy, Index finger, Interferes with daily activities | Subscription, Sizing, Scratches easily, Price | Subscription, Scratches easily, Sizing, Price |
Specs
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Reviews
Customers are saying
Customers recognize the Oura Ring 4 for its accurate sleep tracking, comfortable design, and long battery life. They appreciate the insights and data provided by the accompanying app but express concerns about the subscription fee and the ring's susceptibility to scratches.
Customer Images
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
- Rated 5 out of 5 stars
Oura Ring 4
I absolutely love my Oura Ring 4 in gold! It’s a perfect blend of cutting-edge technology and elegant design. The gold finish is stunning and elevates it beyond just a health tracker—it feels like a luxury accessory that seamlessly integrates into my everyday style. The insights it provides are truly life-changing. The sleep tracking is incredibly accurate, and the readiness score helps me make informed decisions about my activity levels each day. I also appreciate the period prediction feature—it’s discreet, accurate, and so useful for planning ahead. The battery life is fantastic, lasting nearly a week on a single charge, and the app is intuitive and easy to use. The real-time feedback on heart rate and stress levels has encouraged me to make small but impactful changes to my lifestyle. This ring is worth every penny—it’s not just a wearable, but a tool for holistic health and wellness. Highly recommend it to anyone looking for an advanced yet stylish health tracker!
This review is from Oura Ring 4 - Smart Ring - Size Before You Buy with Oura Ring 4 Sizing Kit - Size 13 - Gold
Posted by ChristinaA
- Rated 5 out of 5 stars
Happy I purchased this!
I’ve had the Oura ring in the color Stealth for a few weeks now and I’m enjoying the insight it provides on my health and well-being. I like the looks of this style and have to say it’s quite comfortable. It’s sturdy and have not had issues with scratches on the surface as of yet. The battery life is good, but with that being said, I do charge it every day while I shower. By the time I’m done, the ring is fully charged again. Every morning I look at my sleep tracking and readiness score and add my tags. I’m sure I will continue to enjoy this ring for a long time!
This review is from Oura Ring 4 - Smart Ring - Size Before You Buy with Oura Ring 4 Sizing Kit - Size 11 - Stealth
Posted by CanVan
- Rated 5 out of 5 stars
Get it, you won’t regret it!
After my husband got his Samsung ring over a year ago, I had been really curious about the best iOS alternative. After doing a bunch of research, the Oura ring emerged as the most accurate ring on the market. I also use an Apple Watch for health monitoring, but it is so delightful to be able to take the watch off at night! Mostly, I love the Oura ring. It’s comfortable, lightweight, non-obtrusive, and seems to do the job. The battery life is great! I typically charge it while I shower, so I never see a dead battery. The sleep tracking is highly sensitive, much more than the Apple Watch, so it records all my little wake-up's throughout the night. The cons of this ring are minimal but worth mentioning. I’m not sure how durable the ring itself is. I’ve had it for almost two months and it is definitely scratched up. It’s not as though I’m wearing it while performing hard manual labor. I just do every day chores and this has led to scuffs and scratches. I also wish the charger was wireless (like an iPod case) where you could throw the ring in it and take the whole thing with you and it would charge. The app needs its own review, but since it is required to access the data from the ring, I will do that here as well. The app is crucial to the use of the ring, and it costs money to use. I don’t love that. However, I do love all the app tells me, so it is worth it for me. The app seems much more in tune with me than Apple Health, even though they share data. A few days after getting the ring, I got a cold. The app knew before I did that I was getting sick. I was able to take precautions to not only not spread my cold to others, but to also turn up the self-care so that the symptoms were not too bad. I also really appreciate the chronotype feature that helps you determine your optimal sleep schedule. It calibrated mine fairly quickly and it matches what I had always felt was best for me. It even dynamically sets a “move” goal each day based on your sleep score from the previous night, intuitively knowing if you feel run down and need an easy day or if you feel energized and ready to climb mountains. The app is a treasure trove of data and informative reports. My biggest gripe about the app, aside from the required subscription, is the sleep tracking feature. Like most people, I climb into bed and then spend some time on my phone. I am not actively trying to sleep, but the ring will interpret that as being unable to fall asleep, which can lower your sleep score. I wish that there was a way to let the ring know when you actually put the phone away, turn off the light, and start to go to sleep. Ultimately the whole product is a little expensive, but the data it provides is incredibly insightful and helpful. If you’re in the market for a smart ring, which you probably are if you’re reading this, I recommend giving the Oura ring a try.
This review is from Oura Ring 4 - Smart Ring - Size Before You Buy with Oura Ring 4 Sizing Kit - Size 11 - Brushed Silver
Posted by KimberleyS