Oura Ring
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
Expertly crafted for quality and precision, Oura Ring 4 provides valuable insights into your holistic health – sleep, activity, stress, heart health, cycle and more.
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.
Uninterrupted health tracking
Based on your Oura Ring size and your lifestyle, the Oura Ring 4 battery can last between 5–8 days — so you don’t even have to think 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. With innovative,
AI-powered tools like Oura Advisor, get exclusive access to
actionable insights that become increasingly tailored over
time.
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.
Automatic Activity Detection
From cycling to basketball to housework, Oura automatically detects over 40 activities with heart rate to give you credit for every move you make.
Activity Score
Analyze your activity levels, consistency over time, and recovery time to help you understand if you’re finding a healthy balance between movement and rest.
Personalized Activity Goals
Oura creates a personalized activity goal every day based on your recovery. Depending on your health priorities, this goal might focus on daily activity or calorie burning.
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
Understand what stresses you out and what helps you recover. You can see how your daily movement, activities, and tags contribute to your stress levels, and bounce back faster.
Resilience
Monitor how well your body recovers from day-to-day physiological stress and learn how to build resilience to stress over time.
Cumulative Stress
Track the hidden toll of chronic physiological stress, which accumulates when your recovery from daily stressors is insufficient. This view of your long-term stress allows you to prioritize balance and avoid burnout.
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.
Cardiovascular Age
Quickly understand how your cardiovascular system is aging relative to your chronological age, and what that may mean for long-term health.
Cardio Capacity
Get an estimate of your VO2 Max, or how efficiently your body delivers and utilizes oxygen during intense physical effort.
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
Know when your period is coming with accurate period predictions. By detecting decreases in your body temperature, Oura can help you better track your cycles.
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.
What's Included
Oura Ring 4
Size-specific charger
USB-C cable
Tech Specifications
Sensors
Red and infrared LEDs measure blood oxygen levels
Green and infrared LEDs alternate to measure heart rate and heart rate variability 24/7 and respiration rate
Digital sensor measures temperature trends
Accelerometer tracks movement and activity 24/7
Compatibility
Oura App is available in English, Finnish, Japanese, German, French, Spanish, Italian, Norwegian, Swedish, Czech, Dutch, and Danish
Supports metric and imperial units of measurement
Integrates with 40+ apps
Available on iOS and Android
Weight and Dimensions
Width: 7.90mm
Thickness: 2.88mm (similar to a wedding band)
Weight: 3.3 to 5.2 grams (depending on Oura Ring size)
Battery Life
5-8 days of battery life
Typically charges in 20-80 minutes, depending on battery level
Quality Materials
Non-allergenic titanium on inner & outer surfaces
Seamless titanium interior
Water resistant up to 100m/328 ft
Minor scratches from regular wear are normal
Connectivity
Bluetooth Low Energy
Automatic firmware updates via Oura App
EMF-safe
Supports airplane mode
FCC-certified