NEW - LIMITED QUANTITY
NEW - LIMITED QUANTITY

Circular Slim

Elevate your sleep, energy, and health for good.

World's

thinnest, most powerful

thinnest,
most
powerful

tracker.

As seen on
Wareable review

You only have one life,
take care of it.

Powerful Vibrations
& Haptics

Between 5 and 8 days of battery life with a 45 minutes charging time.

8 days of battery

Between 5 and 8 days of battery life with a 45 minutes charging time.

8 days of battery

Technology shouldn't get in the way. Continue doing what you are best at, without restraint.

Waterproof

Designed to accompany you wherever your journey leads.

Integrate with ease

Consolidate your essential data for expanded insights in one central hub.
Send data to your favorite apps through Circular's integration.
THE
CIRCLES
BE MORE
BE MORE
MORE
BE MORE

Smart
Alarm

Wake up at the perfect moment

Wake up silently to vibrations and at the perfect moment.

Stress
Levels

Comprehensive stress analysis

Get hourly predictions
and manage your stress everyday.

Sleep
Analysis

Understand and improve your sleep, forever

Keep track of your sleep efficiency with bio-signals analysis.

Energy
Analysis

Keep track of your activities & energy levels

Quantify your activities & improve recovery with empowering metrics.

Guided
Breathing

Control your mood with breathing exercises

Take care of your mental health and improve your focus.

Meds
Reminder

Never forget to take your meds again

Create a plan and get reminded with the ring's vibrations

Vitals
Alert

Get alerted if you vitals go off

Set thresholds to be alerted of abnormal HR / SpO2 levels.

Live Mode

Check your vitals, on the spot.

Check on your hr, spO2, hrv and activity intensity, live.

Your Data, Your Privacy.
Circular keeps your data safe, in France.

Hey, I'm Kira

I've
detected
that
despite
your
good sleep,
you
might
get sick

During the calibration period, Kira interacts with you to understand your habits. She then does all of the data correlation work for you to make your experience easy and to provide you with the world's most advanced insights.

Minimal space,

maximum features.

What Circular analyzes for you

Blood oxygenation

Blood oxygen level (SpO2) is a measure of how much oxygen your red blood cells are carrying. Maintaining a precise balance of oxygen-saturated blood is vital to your health. SpO2 is a valuable metric as it is closely related to a lot of respiratory conditions (shortness of breath, asthma, sleep apnea, and more…). A normal reading is typically between 94 and 100 percent. Monitoring blood oxygen level can help with prevention, altitude acclimatisation, recovery and determining if treatments are working.

Heart rate variability

Heart rate variability (HRV) measures the specific changes in time between successive heartbeats and is a great measure of your autonomic nervous system. It can unveil many things about your overall wellbeing. It is used to see how well you recovered after certain events and is a good measure of general stress and tiredness. Variations of HRV are measured against your own Reference. Anything above means that your body and immune system are ready to tackle the upcoming day whereas the contrary would probably mean that you need to focus on recovering.

Temperature variation

Temperature variation is an essential metric to evaluate how your natural defenses respond to your environment. When the variation is higher than +/- 0.8 degrees Celsius compared to your usual baseline, that’s when you need to start paying attention. It can fluctuate with activity, your nutrition, your circadian rhythm, can indicate that your body fights against an illness, can reflect external environment changes such as a season change and can reflect a woman’s menstrual cycle.

Heart rate

Heart rate is the basis of many measurements at Circular. With continuous heart rate monitoring you can get a comprehensive view on how your heart rate change in response to your activities and emotions. In addition to tracking your bpm continuously, we derive many other very valuable metrics from it. A great benefit of having a device like the Circular ring on your finger is that it is most likely one of the most optimal places for PPG-based tracking making measurement more reliable and accurate.

Energy

This is the ultimate score that tells you how much energy you have accumulated for the day. It is made up of many day and night contributors that evaluate your vitality. Every aspect of your body is considered whether it is the immune system, stress levels, sleep, or activity recuperation. If the energy score is high it means that you can surpass yourself, do intense activities, intense mental activities while having minimal risks of getting sick. If it’s low, don’t push yourself, your immune system is weak, avoid over-training and focus on rest.

Activity intensities and calories burned

The Circular ring continuously monitors your activities. Activity intensities are used to quantify whether you do enough physical activity according to your needs and the scientific literature. For ease of reading your activities are divided into low, medium, and high intensity activities. Thanks to these, Circular can determine for you, your active minutes, training zone, activity volume, recovery time and calories burned. Circular correlates the data to determine the type of activity (e.g. running, biking, swimming).

Steps

Circular continuously determines whether you are walking or running and counts for you the number of steps. It also estimates the walking distance equivalency. Circular sets goals by analyzing your profile and habits and helps you achieve your walking goals.

Resting heart rate

RHR is a great measure for your overall health, readiness, and fitness. A low RHR is an indication of a strong heart muscle that can pump out a greater amount of blood with every beat, so it does not have to beat as frequently. Generally speaking, the lower it is, the better. A higher RHR compared to your Reference indicates poor overall wellness conditions, this means that you should avoid too much physical stress and concentrate on recovering.

Breathing rate

Breathing rate reported in breaths per minute is an indicator of your cardiovascular load and is a good indicator of your wellbeing. You breathe harder and faster when you are ill or in need of energy. This metric varies much less than your RHR and HRV. It becomes very useful when it evolves a lot compared to your Reference. This metric acts as a threshold when something is highly unusual. A normal reading for a resting adult ranges from 12 to 18 breaths per minute.

Vo2 max

VO2 max represents the maximum oxygen flow that the body can consume during an effort. VO2 max is considered as a criterion for evaluating physical performance. It gives an indication of the level of fitness and endurance. The higher the value, the more it is easy to maintain an effort of a certain intensity over time. By increasing your VO2 max with training, you will be able to run either faster for the same distance or longer for the same intensity.

Sleep cycles

While  sleeping, you go through several successive stages that all have different functions for your body and mind recovery. Circular automatically tracks your sleep stages (Awake, Light, Rem and Deep sleep), deduces your chronotype, detects your sleep cycle length, assesses how you respond to your current sleep schedule by analyzing several tracked biometrics and parameters that reflect your sleep quality, energy levels, your time to fall asleep, your activities, etc. The goal is to recommend you the perfect duration you need to sleep and how to improve your sleep quality.

Recovery

Physical recovery is a very important aspect to take into consideration when checking your overall condition. Especially after high or medium intensity activities, your body, muscles, and heart need time to repair. Circular automatically checks your activity volume and compares it to your vital signs to know if you have recovered from your past activities.

Stress

Stress can make you lose your composure, but with Circular, you can quantify your stress levels throughout the day. Experience the power of stress analysis seamlessly connected to your personal notes. Plus, with predictions for the upcoming hours, you can proactively plan your day, ensuring that it's not just productive, but also emotionally balanced. This unique combination equips you with actionable insights, making stress a thing of the past. It's like having a digital mentor, guiding you towards a more balanced and fulfilling life.

Coherence

Elevate your emotional state in the moment so you feel better and think more clearly.  The coherence score measures and translates your heart rhythm patterns (HRV) into real-time a coherence score. This trains you to get your heart and brain in sync, which prevents and reduces stress, anxiety, and improves health and performance for more effective choices. With just a few minutes of daily practice, coherence state becomes easily accessible.

See all features
Just one tap to kill your ring's communications.

Airplane mode

Just one tap to kill your ring's communications.

Airplane mode

With airplane mode, turn data synching off. Circular rings can store more than 40 days of data without connecting to your phone.

No subscription
fees

No fees

Get unlimited access to the Circular app and enjoy new future features. One click away from new updates.
Circular coins allow you to unlock extra benefits.

Have fun & gain.

Get access to leaderboards and gain Circular coins for being healthy.

Getting Healthy Pays

Receive Circular Coins every day and convert them into Circular products, access to premium features and special offers from leading brands.

Specs

Ring's models
Circular Pro
Circular Slim
Other rings
Subscription-based access
No
No
Yes
Thickness (mm)
2.75
2.2
2.5+
Weight (g)
4
2
2.2-8
Changeable Shells
Yes
No
No
Battery (days)
8
5
6
AI Wellness Assistant
Yes
Yes
No
Vibration Alarm Clock
Yes
Yes
No
Button
Physical
Tap
None
Memory (days of data)
40
20
6
Earn Financial Rewards
Yes
Yes
No
Vibration-Guided Breathing
Yes
Yes
No
Timer
Yes
Yes
No
Medication Reminder
Yes
Yes
No
Vital Alerts
Yes
Yes
No
Advanced metrics (BR, VO2max, etc…)
Yes
Yes
No
Leaderboard
Yes
Yes
No
Live Measurement (hr/spo2/hrv/activity)
Yes
Yes
No
Data & manufacturing
EU
EU
China/India
Elevate Your

OCEAN

Now