Oura Ring 4

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.

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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.

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 fins the best signal in any situation.

Optimizes battery

Work continuously in the background to optimize battery life.

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.

A finish for
every lifestyle

Silver

Black

Brushed Silver

Stealth

Gold

Rose Gold

☾Sleep

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.

ঌActivity and Fitness

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.

𖧧 Readiness

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.

♒︎Stress

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.

♡Heart Health

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.

♀Women's Health

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

Non-allergenic titanium on inner & outer surfaces

Seamless titanium interior

Water resistant up to 100m/328 ft

Minor scratches from regular wear are normal

Battery Life

5-8 days of battery life*

Typically charges in 20-80 minutes, depending on battery level

Quality Materials

High-performance zirconia ceramic exterior

Seamless titanium interior

Water resistant up to 100m/328 ft

Minor scratches from regular wear are normal

Erasable scuffs may occur while handling metal objects

Connectivity

Bluetooth Low Energy

Automatic firmware updates via Oura App

EMF-safe

Supports airplane mode

FCC-certified