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Circular Ring Slim - The Thinest Smart Ring
No forced subscription
13+ health & wellness features
Accurate ECG
Pick Your Finish
Pick Your Size or Buy with Sizing Kit
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Don't know your Circular size? Try our free online sizer.
You're Set. Add Extras?
Extra Charger
Add an extra charging case to charge on the go
Select the same size as your ring. If you have bought with a sizing kit, select "sizing kit" here as well.
Extra Cable
Add an extra cable for your ring
Insurance
Priority shipping,
support & accidental replacement
/ yearly
14 Day Return Period
Secure Checkout
Worldwide Shipping
Features
ECG - Heart Rhythm
Take a 40-second ECG anytime, anywhere to check on irregular heart rhythms and stay ahead of your heart health.
Women’s health
Track your cycle, fertility, and hormonal phases powered by your body’s vitals.
Advanced analytics
Make graphs overlap and understand how different metrics are linked.
Heart rate tracking
24/7 heart rate & morning resting heart rate.
Breathing rate
Breathing rate during sleep periods.
Temperature
Temperature variations trends help detect fever, menstrual cycles…
Blood oxygenation
Medical grade SpO2 levels during sleep & rest periods.
HRV
Heart rate variability
One of the most important metrics for wellness and recovery monitoring.
Live measurement
On-demand spot measurement for HR, SpO2, HRV, activity intensities, and Max HR.
Alarm clock
Wakes you up with a smart alarm during your lightest sleep stage.
24/7 Activity tracking
Automatically tracks your physical activities and provides recommendations for improvement.
Sleep tracking
Automatically monitors your core sleep and naps to give recommendations on how to improve them.
Launch guided breathing exercises to relax, sleep better, and more.
Timer
Set a timer for your workout or anything else.
Airplane mode
Disable ring’s Bluetooth communication.
Recommendations
Personal, insightful and actionnable wellness recommendations to make sense of your data.
Stress
Live stress score feedback and stress predictions based on your activities.
Get notified when you vitals are going off.
Energy monitoring
Get stats and in depth insights about your energy levels.
Medication
Never forget to take your meds anymore and keep track of your intakes.
Sport tracking
Track outdoor activities with a GPS trace and reports.
Coherence
Dive into a state of optimal function and regulate your emotions and clarity.
ECG - Heart Rhythm
Take a 40-second ECG anytime, anywhere to check on irregular heart rhythms and stay ahead of your heart health.
Women’s health
Track your cycle, fertility, and hormonal phases powered by your body’s vitals.
Heart rate tracking
24/7 heart rate & morning resting heart rate.
Breathing rate
Breathing rate during sleep periods.
Temperature
Temperature variations trends help detect fever, menstrual cycles…
Blood oxygenation
Medical grade SpO2 levels during sleep & rest periods.
HRV
Heart rate variability
One of the most important metrics for wellness and recovery monitoring.
Live measurement
On-demand spot measurement for HR, SpO2, HRV, activity intensities, and Max HR.
Alarm clock
Wakes you up with a smart alarm during your lightest sleep stage.
24/7 Activity tracking
Automatically tracks your physical activities and provides recommendations for improvement.
Sleep tracking
Automatically monitors your core sleep and naps to give recommendations on how to improve them.
Guided breathing
Launch guided breathing exercises through the ring's vibration to relax, sleep better and more.
Timer
Set a timer for your workout or anything else.
Airplane mode
Disable ring’s Bluetooth communication.
Recommendations
Personal, insightful and actionnable wellness recommendations to make sense of your data.
Stress
Personal, insightful and actionnable wellness recommendations to make sense of your data.
Vital alers
Get notified when you vitals are going off.
Energy monitoring
Get stats and in depth insights about your energy levels.
Medication
Never forget to take your meds anymore and keep track of your intakes.
Sport tracking
Track outdoor activities with a GPS trace and reports.
Advanced analytics
Make graphs overlap and understand how different metrics are linked.
Coherence
Dive into a state of optimal function and regulate your emotions and clarity.
What's in the box?
Circular Ring 2
Wireless Charging Case
UBC-C cable
Cleaning Cloth
App Access
Digital User Guide
Technical specifications
Only 3 grams. Lighter than a standard ring.
Comes with a portable charging case.
Up to 7 days of battery life.
Only 3 grams. Lighter than a standard ring.
Comes with a portable charging case.
Up to 7 days of battery life.
Android and Apple compatible.
1 year constructor warranty.
Designed in France, Forged in Mordor & assembled in Asia.
Android and Apple compatible.
Designed in France, Forged in Mordor & assembled in Asia.
1 year constructor warranty.
Sensors
1 Single-Lead ECG
1 infrared LED sensor
1 red LED sensor
1 green LED sensor
3 axis accelerometer
1 surface temperature sensor
Sensors
1 Single-Lead ECG
1 infrared LED sensor
1 red LED sensor
1 green LED sensor
3 axis accelerometer
1 surface temperature sensor
Materials
Exterior: High-grade Titanium with PVD coating
Interior: Medical grade non-allergenic, non metallic Epoxy
Materials
Exterior: High-grade Titanium with PVD coating
Interior: Medical grade non-allergenic, non metallic Epoxy
Weight & Dimensions
Width: 7.8 mm
Thickness: 2.55 mm
Weight: 3 grams
Weight & Dimensions
Width: 7.8 mm
Thickness: 2.55 mm
Weight: 3 grams
Sizing
Sizing
Waterproof
IP68 grade: the ring can be immersed in 50 meters of water for a maximum of 30 minutes.
It is not recommended for use in salted water.
Waterproof
IP68 grade: the ring can be immersed in 1.5 meters of water for a maximum of 30 minutes.
It is not recommended for use in salted water.
Battery & Power
Battery life: Up to 7 days
Full charge in 60 minutes
Charger voltage: 5.5V
Battery & Power
Battery life; Up to 7 days
Full charge in 60 minutes
Charger voltage: 5.5V
Memory
Internal memory
Up to 7 days of data
Memory
Internal memory
Up to 7 days of data
Connectivity
Bluetooth Smart® (Low Energy)
Airplane mode
Connectivity
Bluetooth Smart® (Low Energy)
Airplane mode
Compatibility
Free app on iOS and Android
Compatible with mobile devices that run iOS 11.0 or later, or Android 6.0 or later.
Compatibility
Free app on iOS and Android
Compatible with mobile devices that run iOS 11.0 or later, or Android 6.0 or later.
The most health feature-packed smart ring
The Circular Ring is the only smart ring to utilize vibration instant feedback with Kira AI personal assistant to deliver 13+ features around your fitness & health improvement, providing actionable recommendations and redefining the wearable experience.
Why a ring?
1
Ultimate Comfort: Discreet, fashionable, and comfortable to wear overnight, Only 3 grams, 10x lighter than a smartwatch.
2
Unmatched Accuracy: More accurate biomarker data from the finger due to higher blood flow and tight wearing.
3
Focus on holistic health: No screen, no distraction, better battery life, optimized for accurate and continuous monitoring.
Why Choose Circular
Discover what sets Circular 2 appart.
The Ultimate Wearable Experience, Meet the Circles
Sleep Analysis
Keep track of your sleep effenciency with the powerful Circular Sleep Score and bio-signal analysis.
Experience Circular in 4 easy steps
STEP 1
Unbox, Charge and Wear
STEP 2
Download the Circular App
STEP 3
Quantify and Adjust
STEP 3
Earn rewards
You May Also Like
Does Circular track my heart rate during exercise?
Yes, Circular tracks heart rate during exercise and many other activities. We recommend using the sport session circle to set the ring into a sport mode that will allow better and more frequent tracking than the regular mode.
Can you wear your Circular Ring only during sleep?
Yes, the majority of the analysis are made during sleep. At first, you may miss out on activity data that plays a role in determining your overall scores. But the scoring system will adapt.
How does Circular measure my body signals?
The ring first collects the body signals it needs thanks to its biosensors (green, infrared & red optical pulse sensor, 3-axis accelerometer, and temperature sensors). The ring contains a built-in processor that will process the data and send the data by Bluetooth to the Circular mobile app & cloud for analysis. The Circular analysis engine uses machine learning to better understand your habits and offer a personal experience with personalized recommendations to improve your lifestyle.
Can Circular data synch with other apps such as Apple Health and Google HealthConenct (Google Fit)?
The Circular app offers the ability to sync your data with several third-party apps, such as Apple Health and Google Fit. More to come in the future
Is there any hidden subscription to keep accessing the Circular app?
No, the app access will always remain free with the purchase of a Circular ring. We could be adding future optional premium circles that would be accessible at your choice, with your accumulated Circular coins.
Where do you ship and can I insure my parcel?
The Circular ring ships to most countries, except those under embargo. We invite you to try adding a product and checkout to see if we ship to that country.
Route protection offers you peace of mind with package protection for all of your orders at an affordable price. With Route, you don't have to worry about what to do if your order is lost, stolen or broken during shipment.
If your Route-protected order ends up lost, damaged, or stolen, Route’s expert support team helps ensure that your order gets replaced or refunded as preferred. Claims will be reviewed for approval within 1-2 business days from filing. Need to file a claim? File here
What’s Circular’s return policy?
You may return your fully functional and undamaged Circular product for any reason within 14 days of receipt of your ring for a full refund. Shipping and handling charges are not refundable. Outer-shells and sizing kits are consumables that are not refundable. For detailed instructions, please see the returns page.
No, Circular Ring 2 does not include built-in vibrations. However, vibration-related features like the smart alarm, medication reminders, and guided breathing exercises can still be used through your phone’s vibration settings.
Yes, if you gift the ring to a loved one, you can log into their app account and remotely check their health data. We're developing a more advanced feature to make it more convenient to follow someone else from your dashboard.
Is the Circular Ring a medical device?
No, the Circular Ring is not a medical device. However, the ECG algorithm is FDA-cleared. We’re in the process of getting the Circular Ring as a medical device.