
1) Two Modes: Sleep and Fitness
2) Lightweight and Comfortable: Weighs just 1/3 oz
3) Adjustable Fit: Two adjustable sizes (fits 5-12 mm ring size)
4) Compatibility: Android and iPhone
5) Alerts: Program and receive alerts on your mobile device (Low Spo2%, High Heart Rate, etc.)
While smart rings cannot formally diagnose illnesses as they are not classified as a medical device, the data it provides can give users the ability to screen for early signs of problems. If you follow the wearables tech news, you could not have missed American basketball league NBA announcing getting technology rings for their players and staffers to help identify possible contractions of the coronavirus COVID-19.
The Oura ring is better in general for those who want to wear their ring for monitoring physical output during exercise to optimize daily work-life balance.
CIRCUL is a highly functional sleep and fitness ring, which also features blood oxygen tracking.
Whereas Oura combines body temperature, heart rate, heart rate variation, and respiratory rate data for detecting the symptoms of COVID-19, CIRCUL is based on tracking the blood oxygen level.
A COVID-19-infected person may not notice any fever or shortness of breath but may be dangerously low on oxygen without realizing it. The CIRCUL uses the same method of pulse oximetry devices (the clip-like device mounted on your finger to measure the blood oxygen saturation in hospitals) but as a ring it will not easily fall off.
Most importantly, you can set alarms on your CIRCUL ring if your blood oxygen level drops below a certain threshold. While this does not qualify as a COVID-19 diagnosis, you can contact your doctor for further medical advice and virus testing.
You can use CIRCUL for continuous daytime and workout monitoring and overnight sleep tracking for up to 12 hours.
It provides you with accurate and continuous tracking of the most essential biometric data on a clear mobile app and allows you to easily share online reports with your family members, trainer, or doctor. Professionals can also enroll in a dashboard user interface to monitor their clients virtually.


While the Oura ring appears more fashionable, it requires you do order by specific ring size.
On the other hand, the Circul ring is an easy-to-use, hassle-free device that fits any finger thanks to its adjustable sizing mechanism.
Oura Ring focuses heavily on sleep and activity tracking and self-performance improvement. It delivers personalized recommendations based on the user’s biometric data so that he/she can optimize life according to his/her unique circadian rhythm.
Oura Ring boasts an advanced sleep monitoring technology, tracking sleep duration and quality on a daily basis and how much time is spent in various sleep stages.
Apart from sleep tracking, the Oura Ring features a range of tracking capabilities for body temperature, pulse amplitude, heart rate, heart rate variation, respiratory rate, and even slight hand and finger movements.
Oura Ring offers 8 sizes (6-13 mm). A sizing kit is necessary to find the right fit to see better results. Can be worn on all fingers.
CIRCUL ring is developed by BodiMetrics an American health and medical tech specialist company. Our Reddot award-winning CIRCUL is a sleep and fitness ring with blood oxygen tracking. The origins of the CIRCUL ring stems from the health/medical wearable technology world.
CIRCUL tracks rich sleep data including the blood oxygen level (SpO2), heart rate (HR), oxygen desaturation index (ODI), and the four sleep stages: awake, light sleep, deep sleep, and REM sleep.
CIRCUL is a highly functional sleep and fitness ring which also features daytime monitoring of SpO2 and heart rate, as well as workout monitoring for running, walking, and biking. Continuous daytime and workout monitoring and overnight sleep tracking for up to 12 hours.
The CIRCUL ring design features a unique adjustable sizing mechanism, which makes choosing the right size a lot less of an issue. There are only two adjustable sizes available: small-medium (5-9 mm) and medium-large (9.5-12 mm). No sizing kit necessary. It can be worn on all fingers.
Sleep monitoring and activity tracking
2x infrared heart rate
2x body temperature
3-axis accelerometer
Gyroscope
When sleeping
Yes
Yes
Yes
7 days
8 (6-13 mm)
Silver, black, stealth
Sleep and fitness tracking with blood oxygen monitoring
Blood oxygen level (Sp02)
Optical heart rate
Body temperature
3-axis accelerometer
At all time
Running, swimming, walking, cycling
Yes
Yes
Blood oxygen
Resting heart rate alarm
Exercising heart rate alarm
Yes
18 hours in continuous detection mode
2 adjustable sizes (5-13.5 mm)
Black