Oura Ring 4 | Size 8, Brushed Silver

Oura Ring 4
A smart ring designed for maximum comfort and health awareness.

A new era of unparalleled accuracy and comfort allows you to get to know your health even better – up close and personal than ever before.

Thinner, smarter and designed for you
Designed with precision and quality, the Oura Ring 4 provides valuable insights into your overall health – sleep, physical activity, stress, heart rate, and more.

Up to 8 days of battery life
Depending on the size of your Oura ring and your lifestyle, the Oura Ring 4's battery can last for over a week - so you can forget about charging for days.

Live healthier and longer
Oura membership and Oura ring work together to help you focus on your long-term health goals and build habits that last a lifetime. Personalized insights from Oura help you understand what your body needs today and what it will demand in the future.

Sleep

Sleep assessment
The answer to the question "how did you sleep last night?" Your score is based on your total sleep amount, heart rate variability (HRV), movement during the night, sleep regularity, and other factors.

Sleep phases
Wake up to a detailed overview of your deep, REM, and light sleep analysis from the previous night.

Blood oxygen monitoring
By monitoring your blood oxygen levels while you sleep, Oura can determine if you are experiencing breathing difficulties.

Sleep recommendations
Oura reminds you when to start getting ready for bed to improve your sleep quality.

Activity and physical fitness

Automatic activity recognition
From cycling or basketball practice to housework, Oura automatically recognizes over 40 different activities and records your heart rate to evaluate your every move.

Activity assessment
Analyze your physical activity level, consistency, and recovery time to understand if you are finding a healthy balance between movement and rest.

Personalized activity goals
Each day, Oura offers a personalized activity goal based on your recovery level. Depending on your health priorities, the goal can be focused on overall activity or calories burned.

Preparation

Assessment of readiness
Your readiness assessment is based on changes in body temperature, heart rate, sleep, and other data to show how energetic you are for today.

Detecting signs of disease
Oura monitors temperature and heart rate fluctuations so you can spot potential signs of illness earlier.

Stress

Stress experienced during the day
Learn what stresses you out and what helps you recover. See how your daily movements, activities, and marked situations affect your stress levels - and get back to balance faster.

Stress resistance
Watch how your body recovers from daily physiological stress and learn to build resilience to it over time.

Heart health

Heart rate monitoring 24/7
Watch how your heart rate changes throughout the day and night. Learn how your body responds to daily habits, food, stress, and environment.

Cardiovascular age
Quickly learn how your cardiovascular system ages compared to your actual age and what this could mean for your long-term health.

Cardio capacity
Get an approximate VO₂ Max score - an estimate of how efficiently your body delivers and uses oxygen during intense physical exertion.

Heart rate variability (HRV)
Oura tracks your HRV to help you understand whether you're stressed, sick, or just need more rest.

Women's health

Cycle Insights
Oura analyzes your body temperature changes to provide more accurate insights into your menstrual cycle and help you understand what your body needs during each phase of the month.

Determining the fertile period
No more guessing - get accurate data on your expected peak fertility, chances of conception, and ovulation - without any effort.

Menstrual prediction
Know when to expect your period with accurate predictions. Oura tracks your body temperature and helps you better track your cycle.

Integration with Natural Cycles
Oura Ring partners with Natural Cycles, the first FDA-approved natural birth control app, to automatically sync temperature data.

Partner integrations
Your Oura data can be linked to trusted fertility and cycle tracking apps like Flo, Clue, and more.

Specifications

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