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Our most personal smart ring ever

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

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*.

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.

Become a member for $5.99 USD/month or $69.99 USD/year - and new members 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.

  • A chart showing sleep stages.

    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.

Oura Ring 4 Charger

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