HSA/FSA eligible

Oura Ring 4

Sleeker, smarter, and made for you

Our new Smart Sensing technology provides enhanced accuracy, deeper personalization, and longer battery life.
Sleek, fully-titanium design and discreet sensors provide 24/7 comfort.
With 5-8 days^** of battery life per charge, never miss a beat when it comes to tracking your health.

Oura Membership grows with you

Track over 50 health and wellness metrics, and get personalized insights into your sleep, activity, stress, metabolic, heart health, and women’s health. With innovative, AI-powered tools like Oura Advisor, get exclusive access to actionable insights that become increasingly tailored over time.

Heart Health

Sleep & Rest

Activity & Movement

Stress

Women’s Health

Metabolic

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

Frequently Asked Questions

The sensors in the Oura Ring have been tested against laboratory results in multiple validation studies. Learn more about Science & Research at Oura.

Wearables differ in where they're worn, the sensors they use, and how they process data. For the most consistent and meaningful insights, it's best to track trends and changes over time within your Oura Ring and Oura App, rather than comparing your Oura results to those from other devices.

Oura Ring is water-resistant up to 100 meters (~330 feet), meaning that you can wear it while showering, swimming, or partaking in recreational diving (e.g. snorkeling), but we don’t recommend using your Oura Ring while scuba diving or keeping it submerged underwater for over 12 hours. Chlorine will not damage it.

Oura Ring operating temperature ranges from -10–52°C / 14–125°F. You can safely wear your Oura Ring in the shower, hot tubs, saunas, ice baths, and cryotherapy tanks. However, extended exposure to extreme temperatures (below -20°C / -4°F or above 60°C / 140°F) may lead to battery damage.

We recommend you use an Oura Ring sizing kit before selecting your Oura Ring size. The kit includes plastic ring sizers corresponding to Oura Ring sizes, which differ slightly from standard ring sizes (note: half sizes are not available).

For accuracy, wear the sizing ring for at least 24 hours, including while sleeping, before finalizing your size. If you’re between sizes, we recommend choosing the smaller size for a more secure fit. Visit our Sizing Page for more information.

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

^*Your Oura Membership will automatically renew on a monthly or annual basis until you cancel. You may cancel at any time. Cancellation will take effect at the end of your current automatic renewal term. Canceling does not entitle you to a full or pro-rated refund of any paid fees. If you do not cancel before the end of any free trial or any prepaid membership term, your Oura membership will automatically renew and you will be charged at the applicable rate for your selected membership term.
^**Battery life and longevity depend on Oura Ring size, Oura App settings, feature configuration, activity, battery age, 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 Oura Ring 4 Battery Life and Ring Battery Tips for more information.