Oura Ring 4
The standard in rings: sleep, temperature, heart rate, and daily readiness.
- What it is
- The standard in rings: sleep, temperature, heart rate, and daily readiness.
- Best for
- Sleep tracking · Activity analysis · Stress management
- Platforms
- iOS · Android
Strengths
- The standard in rings: sleep, temperature, heart rate
- Daily readiness score
Weak points
- Subscription required for most analysis
- High purchase price
What is Oura Ring 4?
The Oura Ring 4 is a smart ring designed for continuous monitoring of physiological data. It features Smart Sensing technology, which adapts its sensors to the finger's morphology to collect health measurements throughout the day and night. The device syncs with a dedicated mobile application to present this information to the user. The device is available in several finishes, using materials such as titanium or zirconia ceramic. It is intended to be worn continuously, including during sleep and physical activity, to provide indicators on recovery, heart rate, and other general wellness parameters.
At a glance
- Type
- Smart ring
- Platforms
- iOS, Android
- Subscription required
- Yes
- Free trial
- Yes
- French
- Yes
- Availability
- France, Canada, United States, Germany, Italy, Spain, Netherlands, Sweden, Denmark, Finland, Norway
- Uses AI
- Yes
- Evidence level
- Partial clinical validation
This information is indicative and may change: only the publisher's own website is authoritative.
What the AI does: Oura uses machine learning algorithms to analyze biometric data and provide personalized insights on sleep, activity, and stress via the app.
Who uses Oura Ring 4?
Wellness-oriented users
Individuals who want data on their daily habits and recovery.
Athletes and active individuals
People looking to track their physical activity levels and heart rate continuously.
Key features
Smart Sensing
Adaptive sensor technology designed to improve measurement accuracy by adjusting to the finger's morphology.
Biometric tracking
Measurement of heart rate, heart rate variability, blood oxygen levels, and respiratory regularity.
Battery life
The battery provides between 5 and 8 days of operation depending on usage and feature configuration.
Design
Ring available in titanium or zirconia ceramic, with sensors embedded for comfort.
Pricing
Starts at US$349.00 in the US and CA$479.00 in Canada.
Pricing recorded on November 1, 2026. Excluding taxes and shipping. Prices change: the amount that applies is the one shown by the publisher's own checkout.
Initial purchase
Starting at US$349.00 / CA$479.00
Price varies based on the chosen finish.
- Continuous health tracking
- Oura application
Oura Membership
US$5.99 / CA$7.99 per month
Required to access complete features and personalized insights.
- Personalized insights
- In-depth sleep analysis
- Automatic activity detection
Using the Oura Ring 4 requires purchasing the hardware as well as a monthly subscription to access all features and analyses within the mobile application.
Use cases
Sleep analysis
Tracking sleep stages and nocturnal recovery.
Outcome: Providing a daily readiness score.
Activity tracking
Recording movement and energy expenditure.
Outcome: Visualizing physical activity levels.
Stress monitoring
Analyzing physiological variations related to periods of tension.
Outcome: Identifying daily stress trends.
How it works in practice
Setup
- 1Choose size via the sizing kit
- 2Charge the ring on its base
- 3Install the Oura app on iOS or Android
- 4Pair the ring via Bluetooth
Data consultation
- 1Wear the ring daily
- 2Sync the ring with the app
- 3Check health dashboards
In your daily routine
Mobile compatibility
The application is available on iOS and Android platforms.
Integrations
Ability to integrate data with other health apps such as Strava.
Known limits
Non-medical usage
The features are not intended to diagnose, treat, or prevent any diseases.
Subscription dependency
Access to comprehensive analysis requires an active membership.
Consider something else if
- Smartwatches with integrated screens
- Activity trackers dedicated to intensive sports
- Medical sleep monitoring devices
How to use it
Wearing the ring
The ring should be worn snugly to ensure the accuracy of the sensors located on the inside.
Maintenance
Clean the ring regularly and use the provided polishing pad for ceramic models.
Frequently asked questions
Is the Oura Ring 4 waterproof?+
The ring is designed to be water-resistant, allowing it to be worn during daily activities.
Which platforms are compatible?+
The Oura app is available on iOS and Android operating systems.
Is the membership mandatory?+
The membership is necessary to access advanced features and detailed analyses in the app.
How do I charge the ring?+
The ring is charged via a specific provided cradle connected by a USB-C cable.
Is the data medical?+
No, the provided data is intended for general wellness and does not replace medical advice.
Sources
Evidence level shown: Partial clinical validation
Smart rings, including the Oura Ring, are compared to polysomnography: good agreement on sleep time, low on stages. Published validations focus on previous generations.
No published source specific to this product has been identified so far.
Background on the approach
General references on the category or technology: they do not cover this specific product.
- 1.de Zambotti M. et al., "The sleep of the ring: comparison of the ŌURA sleep tracker against polysomnography", Behavioral Sleep Medicine, 2019
- 2."Performance of wearable finger ring trackers for diagnostic sleep measurement in the clinical context", Scientific Reports, 2025
- 3.Validation of the Oura ring (Gen3) against polysomnography, Sleep, 2024
These references cover the approach or technology, not an evaluation of the product by us. None of these links is an affiliate link. Read our method.
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