Oura Ring is FSA or HSA eligible. Learn More

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.*

A person views the Oura app on their smartphone while wearing an Oura ring on their right index finger

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.

  • Oura Ring app view of sleep score data

    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.

  • Oura Ring app view of sleep stages data

    Sleep Stages

    Wake up to in-depth analysis of your deep sleep, REM sleep, and light sleep from the night prior.

  • Oura Ring app view of blood oxygen data

    Blood Oxygen Sensing

    By detecting your blood oxygen levels at night, Oura can tell if you’re experiencing any breathing disturbances.

  • Oura Ring app view of bedtime approaching data

    Bedtime Guidance

    Oura reminds you when to start winding down so you can improve your sleep quality.

An assortment of Oura Rings in different finishes

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
Oura Ring 4 Charger

What's included

Oura Ring 4 Charger

Every Oura Ring comes with one size-specific charger and USB-C cable.

  1. * 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.