Our most personal smart ring ever
A new era of unparalleled accuracy and comfort helps you get up close and personal with your health like never before.
Sleeker, smarter, and made for you
A product of Finnish craftsmanship, Oura Ring 4 unlocks insights into your sleep, activity, stress, heart health, and more.
Smart Sensing powers our most accurate smart ring ever
Increases accuracy
Provides continuous data for a holistic picture of your health.
Adapts to you
Understands your unique finger and finds the best signal in any situation.
Optimizes battery
Works continuously in the background to optimize battery life.
Incredible comfort for 24/7 wear
Fully titanium
Made of lightweight, durable titanium — inside and out.
Discreet sensors
Fully round interior with recessed sensors.
Non-allergenic
Comfortable and gentle, even on sensitive skin.
Up to 8 days of battery life
Based on your Oura Ring size and your lifestyle, the Oura Ring 4 battery can last over a week — so you can go days without even thinking about charging.*
Live healthier, longer
Oura Membership and Oura Ring work hand-in-hand, empowering you to prioritize your long-term health goals and build healthy habits that will last a lifetime. Personalized insights from Oura help you understand what your body needs, for today and for your future.
iOS & Android Compatible
A finish for every lifestyle
Oura Membership grows with you
Oura Membership translates your body's data into actionable insights personalized to your unique needs.
Get exclusive access to personalized guidance that becomes increasingly tailored over time. Become a new member for $5.99 USD/month or $69.99 USD/year — and get your first month on us.
Sleep Score
The answer to “how did you sleep last night?” Your score is based on your total sleep, heart rate variability (HRV), nighttime movement, sleep regularity, and more.
Sleep Stages
Wake up to in-depth analysis of your deep sleep, REM sleep, and light sleep from the night prior.
Blood Oxygen Sensing
By detecting your blood oxygen levels at night, Oura can tell if you’re experiencing any breathing disturbances.
Bedtime Guidance
Oura reminds you when to start winding down so you can improve your sleep quality.
Activity Score
Oura analyzes your activity levels, activity intensity, and recovery time to help you understand if you’re finding a healthy balance between movement and recovery.
Workout Heart Rate
Record your heart rate during workouts and get post-exercise insights to understand how your body reacts and how movement impacts your sleep and readiness.
Automatic Activity Detection
From cycling to basketball to housework — Oura can automatically detect over 40 activities to give you credit for every move you make.
Readiness Score
Your Readiness Score uses your temperature trends, heart rate, sleep, and more to highlight how energized you are for the day.
Illness Detection
Oura monitors shifts in your temperature and heart rate so you can tell when you may be getting sick sooner.
Daytime Stress
Oura tracks your heart rate, HRV, and temperature trends to help you understand what stresses you out and what helps you recover — so you can bounce back faster.
Resilience
Resilience allows you to understand how well your body recovers from physiological stress.
24/7 Heart Rate Monitoring
See how your heart rate changes, day and night. Learn how your body responds to daily habits, meals, stress, and environment.
Heart Rate Variability
Oura tracks your HRV to help you understand if you’re stressed, sick, or need to take time to recover.
Cycle Insights
Oura uses temperature trends to unlock more accurate insights about your menstrual cycle, so you understand what your body needs throughout the month.
Period Prediction
Oura predicts your period by monitoring changes in your daily temperature.
Natural Cycles Integration
Oura Ring partners with Natural Cycles, the first FDA-cleared birth control app, to automatically sync temperature data within the Natural Cycles app.
Partner Integrations
You can choose to integrate your Oura data with the birth control and fertility apps you trust, like Flo, Clue, and more.
Our most advanced smart ring yet
See how it compares with Oura Ring Gen3.
Tech Specifications
Quality Materials
- Non-allergenic titanium on inner and outer ring surfaces
- Seamless titanium interior
- Minor scratches from regular wear are normal over time
- Water resistant up to 100m/328 ft
Sensors
- Red and infrared LEDs measure blood oxygen levels while you sleep
- Green and infrared LEDs alternate to measure heart rate and heart rate variability 24/7 and respiration rate during your sleep
- Digital sensor measures your temperature variations
- Accelerometer tracks movement and activity 24/7
Battery Life
- Up to 8 days of battery*
- Typically charges in 20-80 minutes, depending on battery level
Weight and Dimensions
- Width: 7.90mm
- Thickness: 2.88mm (similar to a wedding band)
- Weight: 3.3 to 5.2 grams (depending on ring size)
Compatibility
- Oura App is available in English, Finnish, Japanese, German, French, Spanish, Italian, Norwegian, Swedish, and Danish
- Supports metric and imperial units of measurement
- Integrates with 40+ apps
- Available on iOS and Android
Connectivity
- Bluetooth® Low Energy
- Automatic firmware updates via Oura App
- EMF-safe
- Allows airplane mode
- FCC-certified
What's included
Oura Ring 4 Charger
Every Oura Ring comes with one size-specific charger and USB-C cable.
- * All battery claims depend on Oura Ring size, Oura App settings, feature configuration, activity, age of battery, usage, and many other factors; actual results will vary. Battery life and charge cycles vary by use and settings. Battery tests were conducted across various sizes and scenarios. See Ring Battery tips for more information.