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Circular Ring Slim - The Thinest Smart Ring
No forced subscription
Haptic feedback with vibrations
Choose Your Finish
Choose Your Model
Extra Cable
Add an extra cable for your ring
Extra charger
Add a second charger
Insurance
Priority shipping,
support & replacement
14 Day Return Period
Secure Checkout
Worldwide Shipping
Delivery timeline
Out Of Stock
Features
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 vibrations. Also with 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 through the ring's vibration to relax, sleep better and more.
Timer
Make the ring vibrate after a specified delay.
Airplane mode
Disable all ring's 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 with vibration reminders.
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.
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 vibrations. Also with 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
Make the ring vibrate after a specified delay.
Airplane mode
Disable heavy ring's 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 with vibration reminders.
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 Slim
Charger
Technical specifications
Only 2 grams. Lighter than a standard ring.
Comes with a portable charger.
Up to 5 days of battery life.
Only 2 grams. 30x lighter than a smartwatch.
Comes with a portable charger.
Up to 5 days of battery life.
Android and Apple compatible.
1 year warranty.
Forged in Mordor. Design & Assembled in France.
Android and Apple compatible.
Forged in Mordor. Designed & Assembled in France.
1 year warranty.
Sensors
1 infrared LED sensor
1 red LED sensor
1 green LED sensor
3 axis accelerometer
1 surface temperature sensor
Sensors
1 infrared LED sensor
1 red LED sensor
1 green LED sensor
3 axis accelerometer
1 surface temperature sensor
Active Feedback*
A powerful vibration motor
A reactive button (activated with a tap)
*only for Slim ring with vibration option
Active Feedback*
A powerful vibration motor
A reactive button (activated with a tap)
*only for Slim ring with vibration option
Materials
Exterior: High grade alloy of matte black bead blasted aluminium and carbon fiber
Interior: Medical grade non allergenic, non metallic and comfortable inner material
Materials
Exterior: High grade alloy of stainless steel and carbon fiber with coating
Interior: Medical grade non allergenic, non metallic and comfortable inner material
Weight & Dimensions
Width: 8.8 mm
Thickness: 2.2 mm
Weight: 2 grams
Weight & Dimensions
Width: 8.8 mm
Thickness: 2.2 mm
Weight: 2 grams
Sizing
Available in 8 sizes: From US 6 to US 13
Circular ring sizes fit just like regular rings sizes
You can easily find your size with the Circular Sizing Guide or 3D rings that you can print!
Sizing
Available in 8 sizes: From US 6 to US 13
Circular ring sizes fit just like regular rings sizes
You can easily find your size with the Circular Sizing Guide or 3D rings that you can print!
Waterproof
IP68 grade: the ring can be immersed in 5 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 5 days
Full charge in 45 minutes
Charger voltage: 5.5V
Battery & Power
Battery life; Up to 5 days
Full charge in 45 minutes
Charger voltage: 5.5V
Memory
Up to 20 days of data
Memory
Up to 20 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.
Why Choose Circular
Click on the circles to discover the features
Experience Circular in 4 easy steps
1 - Unbox, Charge and Wear
2 - Download the Circular App
3 - Quantify and Adjust
4 - Earn rewards
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Get an extra charger
Get a cord extension
FAQ
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?
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.