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.
• Oura Ring 4 battery can last over a week — so you can go days without even thinking about charging.^**

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.

• Heart Health
• Sleep & Rest
• Activity & Movement
• Stress
• Women’s Health: Cycle Insights, Fertile Window, and Pregnancy Insights
• Metabolic

Frequently Asked Questions

How accurate is the Oura Ring?

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.

Can I wear my Oura Ring in pools, saunas, or ice baths?

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.

What does the Oura Ring track?

Can I use Oura Ring without a subscription?

Oura Membership unlocks the full potential of the Oura App, allowing you to access detailed insights and personalized guidance. Without a membership, the Oura Ring can be used only with limited functionality.

How do I choose the right size for my Oura Ring?

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.

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

• Up to 8 days of battery^**
• 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

• Oura Ring 4
• Size-specific charger
• USB-C cable

^*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.