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Next-Gen Precision

Advanced SST™ Ultra2.0 sensors. Al-powered, Medical-grade health metrics at your fingertip.

cutting-edge sensors
cutting-edge sensors

One Ring. Any Finger

The innovative SST™ Flex design ensures a perfect fit and accuracy. Always comfortable. Always precise.

Circul Fitness Tracker
Circul Fitness Tracker

Your Health, Illuminated

Observe the subtleties. Gain long-term insights. Stay ahead of your health.

smart ring for women
smart ring for women

A Health Revolution At Your Fingertip

Unprecedented precision

CIRCUL is not just a ring; it's your personal health advisor. Combining cutting-edge sensor technology with AI algorithms, CIRCUL brings medical-grade precision monitoring to your fingertip.

Meet the SST™ Ultra 2.0 sensors

We engineered every detail — from advanced PPG sensors to intelligent algorithms — to create the most precise health monitoring experience ever.

Flexible Photoelectric Sensors

3-Wavelength Photoelectric Sensors

G-Sensor

High-precision Temperature Sensor

Next-Gen Health Precision Monitoring

Medical-grade reliability

In accordance with the standards of the American Academy of Sleep Medicine (AASM), heart rate and blood oxygen data can be updated every second.— Achieving the highest resolution and precision data in the industry

Heart Rate Monitoring

Updates data every second with an accuracy of ±2 bpm, providing highly accurate heart rate information to help users promptly identify cardiac health abnormalities.

Heart Rate Monitor
Real-Time Sleep Monitoring

Thoroughly analyzes sleep stages, including light, deep, and REM (rapid eye movement) sleep, offering detailed sleep quality reports to help improve sleep habits.

Sleep Monitor
Sleep Apnea Detection

Identifies mild, moderate, and severe apnea, aiding in the early detection of potential sleep issues.

Sleep Apnea Detection
Continuous Blood Oxygen Monitoring

Offers real-time tracking with second-level updates help users to assess respiratory health.

Blood Oxygen Monitor
Exercise Heart Rate Monitoring

Provides real-time updates every two seconds, supporting heart rate tracking across various activities such as running, swimming, and cycling.

fitness monitor
Temperature Monitoring

Achieves an accuracy of ±0.1°C, updating every minute to quickly detect temperature anomalies, especially during menstrual cycle tracking and flu seasons or pandemics.

Temperature Monitor
Activity Management

Not only counts steps and calories burned, but also intelligently identifies five different exercise modes, offering comprehensive activity data analysis and improvement plans.

Activity tracker
High-Precision HRV Monitoring

Achieves millisecond-level accuracy, continuously analyzing heart rate variability, which is invaluable for evaluating overall health and stress levels.

HRV Monitor
Stress Analysis

Conducts continuous stress assessments based on HRV data, helping users understand and manage their stress levels effectively.

Stress tracker

Adaptive Sizing Design

24/7 All-day comfortable fit.

Say goodbye to complexity, embrace simplicity. The innovative SST™ flex design automatically adjusts to your finger size, ensuring comfortable wear and data accuracy—no more worries about sizing!

Why this design?

Technology Should Adapt To You, Not The Other Way Around.

At CIRCUL, we believe comfort and precision should never be compromised. Our revolutionary self-adapting smart ring embodies this philosophy, delivering a seamless health monitoring experience that fits every finger, every time.

Sleep Health, Redefined

Understand every breath you take, Gain insights into every dream you have.

Sleep Apnea Monitoring

Sleep Apnea Detection: Capable of identifying mild, moderate, and severe apnea, aiding in the early detection of potential sleep issues.

Circul Ring tracking sleep and breating

Comfortable 24/7 wear

Lightweight design, support for sleep wear, provide complete sleep data

Women's pregnancy and period tracking

Detailed sleep report

Real-Time Sleep Monitoring: Thoroughly analyzes sleep stages, including light, deep, and REM (rapid eye movement) sleep, offering detailed sleep quality reports to help improve sleep habits.

Sleep report for iPhone and Android

Sleep Apnea Monitoring

Sleep Apnea Detection: Capable of identifying mild, moderate, and severe apnea, aiding in the early detection of potential sleep issues.

Circul Ring tracking sleep and breating

Stress Management,
Effortlessly

Life moves fast, But your mind can slow down.

Real-time stress monitoring, Personalized relaxation suggestions, Helping you find calm amidst the chaos. CIRCUL, your personal meditation master.

Stress Insights In Real Time

Advanced HRV analysis tracks your stress levels continuously. See your body's response to daily challenges, instantly.

Workwear with Circul for stress tracking

Personalized Calm

Turn data into tranquility. Receive tailored relaxation suggestions based on your unique stress patterns. Your path to balance, simplified.

Personalized relaxation suggestions for calm

HRV Precision: A New Era

Monitor your heart's rhythm with unparalleled detail. CIRCUL captures every beat, providing insights into your overall health and stress levels. 24/7.

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Millisecond Accuracy

Activity, Smarter and More Efficient

Break through your limits, Starting with understanding yourself. Making every drop of sweat count towards your goals.

Activity, Smarter and More Efficient

Break through your limits, Starting with understanding yourself. Making every drop of sweat count towards your goals.

Real-Time Data Feedback
Activity Goal Achieved
Exercise Heart Rate Monitoring

Making every drop of sweat count towards your goals.

Health, Within Your Control

Foresee the future, Master the present.

health monitor
Always Alert. Always Protecting

CIRCUL watches over you 24/7. Detecting arrhythmias and oxygen dips in real-time. Day or night, it's your silent guardian. Catch potential issues early. Stay ahead of your health.

smart ring 2025
Health Trend Reports, Archived

More than numbers. ClRCUL reveals your wellness story. Heart rate trends. Sleep patterns. Stress insights. All in one comprehensive, shareable report. Empower your choices. See your health clearly.

We believe everyone should be the master of their own health. CIRCUL empowers you, giving you intimate knowledge of your body. It's not just your health partner; it's your life assistant.

Ready to Transform Your Health?

Trusted by Experts, Validated by Science

Discover why CIRCUL RING is the world’s trusted health ring.

Expert Endorsements