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Oura - Ring 4 - Smart Ring - Size Before You Buy with OR4 Sizing Kit - Size 9 - Stealth - (2024)

Model: JZ90-54218-09
SKU: 6595530
Sold byBest Buy

Customers are saying

Customers often highlight the excellent sleep tracking capabilities and overall performance, often calling it a great self-care device. Many also praise its comfortable, lightweight design, impressive battery life, and generally accurate data. However, some users have noted concerns regarding its size, scratch resistance, and occasional Bluetooth connectivity issues.

Generated by AI based on customer reviews.
Features
  • 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 50 health metrics, 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 50 different health metrics — 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.

  • 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.

  • Metabolic

    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.

  • Oura Advisor

    Oura Advisor is an AI-powered health coach to help you understand your body and your biometrics. Use it as a sounding board to help guide you towards healthy habits, make nutritional decisions and answer questions you might have about your data.

  • Mutli-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.

  • 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.

See all features
Specifications
  • 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
    Band Material
    Titanium
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Reviews

Customers are sayingCustomers often highlight the excellent sleep tracking capabilities and overall performance, often calling it a great self-care device. Many also praise its comfortable, lightweight design, impressive battery life, and generally accurate data. However, some users have noted concerns regarding its size, scratch resistance, and occasional Bluetooth connectivity issues.
This summary was generated by AI based on customer reviews.
  • Sleep Tracking (939)
  • Overall Performance (844)
  • Comfort (502)
  • Battery Life (472)
  • Design (293)
  • Size (90)
  • Scratch Resistance (84)
  • Connectivity (26)

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

    Amazing Insight into My Health and Sleep

    I’ve been using the Oura Ring for a few months now, and I’m genuinely impressed. It’s sleek, comfortable, and so easy to wear that I often forget I have it on. The data it provides about sleep, readiness, and activity has really helped me understand my body better and make small changes that have a big impact. The sleep tracking is particularly accurate — it shows not just how long I sleep, but how well. I love being able to see my sleep stages, heart rate variability, and recovery score every morning. The app is intuitive and gives practical suggestions instead of just numbers. Battery life is excellent (about a week per charge), and the ring itself still looks brand new. It’s also nice that it can track temperature and even detect early signs of stress or illness. Overall, it’s one of the best wellness investments I’ve made. Highly recommend it to anyone serious about improving their sleep and overall health.

    This review is from Oura - Ring 4 - Smart Ring - Size Before You Buy with OR4 Sizing Kit - Size 7 - Gold - (2024)

    Posted by MariaC

  • Rated 5 out of 5 stars

    Health Management using my Oura Ring 4

    My Oura Ring 4 provides detailed information about what I consider the pillars of health, and I’m genuinely thrilled with the insights it delivers. I wear it constantly — it’s comfortable, unobtrusive, and the battery life is impressive. I only need to charge it every few days, and even then it’s quick, usually done while I’m showering and getting ready. I purchased the ring primarily to monitor my sleep patterns. Although I’ve been diagnosed with severe obstructive sleep apnea, those around me often say I sleep quietly, so I wanted a clearer picture of what was really happening. The Oura Ring gives me exactly that: hour‑by‑hour sleep details, personalized guidance, and trends that help me understand and improve my rest. Beyond sleep, I’ve been tracking my activity, heart rate, and stress levels. The increased awareness of how my body responds throughout the day has led to meaningful habit changes. I’ve even experienced some weight loss simply through behavior adjustments inspired by the data. I continue to monitor my metrics daily, and the ring has become an essential part of my wellness routine. In short, the Oura Ring 4 has given me clarity, motivation, and measurable improvements — it’s become one of the most valuable tools in my journey toward better health.

    This review is from Oura - Ring 4 - Smart Ring - Size Before You Buy with OR4 Sizing Kit - Size 11 - Silver - (2024)

    Posted by SUSANH

  • Rated 5 out of 5 stars

    Game Changer For Health Tracking

    I recently purchased the Oura Ring, and I couldn't be happier with my decision! This sleek and stylish ring has completely transformed the way I approach my health and wellness. First off, the design is fantastic—it's lightweight and comfortable to wear, making it easy to forget that I even have it on. The range of features is impressive; from tracking my sleep patterns to monitoring my activity levels and heart rate, the Oura Ring provides comprehensive insights that help me make informed decisions about my health. The sleep tracking, in particular, has been a revelation. I love how it breaks down my sleep stages and gives me a readiness score each morning, allowing me to adjust my routines accordingly. The app is user-friendly and visually appealing, making it easy to interpret my data at a glance. Battery life is exceptional, lasting about a week on a single charge, which is a huge plus. Plus, the ring is durable and water-resistant, so I don’t have to worry about taking it off during workouts or showers. Overall, the Oura Ring is an invaluable tool for anyone serious about tracking their health and improving their lifestyle. I highly recommend it to anyone looking to take their wellness journey to the next level! be happier with my decision! This sleek and stylish ring has completely transformed the way I approach my health and wellness. First off, the design is fantastic—it's lightweight and comfortable to wear, making it easy to forget that I even have it on. The range of features is impressive; from tracking my sleep patterns to monitoring my activity levels and heart rate, the Oura Ring provides comprehensive insights that help me make informed decisions about my health. The sleep tracking, in particular, has been a revelation. I love how it breaks down my sleep stages and gives me a readiness score each morning, allowing me to adjust my routines accordingly. The app is user-friendly and visually appealing, making it easy to interpret my data at a glance. Battery life is exceptional, lasting about a week on a single charge, which is a huge plus. Plus, the ring is durable and water-resistant, so I don’t have to worry about taking it off during workouts or showers. Overall, the Oura Ring is an invaluable tool for anyone serious about tracking their health and improving their lifestyle. I highly recommend it to anyone looking to take their wellness journey to the next level!

    This review is from Oura - Ring 4 - Smart Ring - Size Before You Buy with OR4 Sizing Kit - Size 9 - Rose Gold - (2024)

    Posted by ChristieB

  • 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 OR4 Sizing Kit - Size 11 - Brushed Silver - (2024)

    Posted by KimberleyS

  • Rated 5 out of 5 stars

    Outstanding Health Tracking & Battery Life

    I’ve been using the Oura Ring for a while now, and I’m genuinely impressed with its accuracy and functionality. This sleek, comfortable ring provides detailed insights into sleep, activity, and recovery, making it a valuable tool for anyone serious about health tracking. What stands out the most is the battery life—I easily get 5–7 days on a single charge, which is far better than many other wearables. The sleep tracking is incredibly detailed, giving me insights into my deep sleep, REM cycles, and even my readiness score for the day. It has helped me fine-tune my routine for better rest and overall well-being. The ring is lightweight and comfortable, so I barely notice I’m wearing it. The app is user-friendly and presents data in a clear, actionable way. While the upfront cost is high, I find the long-term benefits absolutely worth it. If you’re looking for a discreet, high-tech health tracker with excellent battery life and insightful data, the Oura Ring is a fantastic choice. 5/5 stars!

    This review is from Oura - Ring 4 - Smart Ring - Size Before You Buy with OR4 Sizing Kit - Size 11 - Brushed Silver - (2024)

    Posted by AkitaSamurai

From the manufacturer

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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 50 biometrics including sleep, readiness, activity, heart health, stress, metabolic health and women’s health.

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Oura - Ring 4 - Smart Ring - Size Before You Buy with OR4 Sizing Kit - Size 8 - Gold - (2024)

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Oura - Ring 4 Ceramic - Smart Ring - Size Before You Buy with OR4 Sizing Kit - Size 9 - Cloud - (2025)

Oura Ring 4 Ceramic is a modern expression of our revolutionary smart ring technology that blends refined elegance with everyday durability. The high-performance ceramic exterior is designed to keep up with you and all that you do. The Ceramic Collection is available in four unique colors: Midnight, Petal, Tide and Cloud. Each new color is built to accent your style and personality. This colorful new take comes with the same cutting-edge technology of Oura Ring 4. Track over 50 health metrics and get personalized insights into your sleep, activity, readiness, stress, heart health, metabolic health, women's health and more. It is built around a breakthrough sensing technology, Smart Sensing, which adapts to your finger to deliver accurate, continuous data. With 5-8 days of battery life, you'll see a complete picture of your health. It's designed with recessed sensors on the interior, making it comfortable and gentle, even on sensitive skin. Oura Ring 4 Ceramic comes in sizes 4-15 and four stunning finishes to fit your style and your finger, effortlessly. Keep your Oura Ring 4 Ceramic looking like new with the Ceramic Polishing Pad. Once you activate your Oura Ring 4 Ceramic, you’ll receive an in-app message and email with instructions to redeem your free Ceramic Polishing Pad. Due to the hardness of the zirconia ceramic, it can take on the color of softer metals, like a dumbbell or cookware. Over time, you may notice grey marks on your Oura Ring 4 Ceramic. Rest assured, it's not damaged — it's evidence of a metal transfer and easy to remove with proper cleaning. Use caution when handling metal objects and consider removing your Oura Ring for some activities. The Oura Ring 4 Ceramic Polishing Pad is your partner in keeping your ring in top condition.

Pros for Oura - Ring 4 - Smart Ring - Size Before You Buy with OR4 Sizing Kit - Size 9 - Stealth - (2024)
Sleep Tracking, Overall Performance, Comfort, Battery Life, DesignSleep Tracking, Overall Performance, Comfort, Battery Life, DesignSleep Tracking, Overall Performance, Comfort, Battery Life, DesignOverall Performance, Sleep Tracking, Comfort, Battery Life, Design
Cons for Oura - Ring 4 - Smart Ring - Size Before You Buy with OR4 Sizing Kit - Size 9 - Stealth - (2024)
Size, Scratch Resistance, ConnectivitySize, Scratch Resistance, ConnectivitySize, Scratch Resistance, ConnectivitySize, Weight

Specs

Questions & Answers
  • Can this ring monitor my heart's health?

    Yes, this ring helps you take care of your heart by monitoring heart rate and HRV.

    This question and answer was generated by AI based on customer and product data.
  • How long does the battery last on this ring?

    The battery lasts up to 8 days on this ring.

    This question and answer was generated by AI based on customer and product data.
  • How long does the battery last on this ring?

    The battery lasts up to 8 days on this ring.

    This question and answer was generated by AI based on customer and product data.
  • Are there different language options available on the app?

    Yes, the app is available in multiple languages including English, Finnish, and Japanese.

    This question and answer was generated by AI based on customer and product data.
  • Can this ring measure my heart rate?

    Yes, this ring monitors daily heart rate and HRV.

    This question and answer was generated by AI based on customer and product data.
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