The Circular smart ring is a wellness and fitness wearable with a well-rounded pack of features focused on sleep tracking and daily activity monitoring.

Through the accompanied smartphone app, Circular provides the user with specific insights from the data gathered. It also provides a smart alarm, notifications, touch control functions, and, sensors for monitoring heart rate, blood oxygen level, and, movement through a three axis acceleration sensor. Circular’s battery lasts for two days of use.

Circular comes with an integrated, intelligent voice assistant companion, Kira to deliver smart and tailored insights at the right moments.

As the only smart ring in the market, Circular can be personalized simply by switching the outer shell of the ring – three replacement shields are available: black, rose gold and silver. The ring includes Bluetooth to connect to a smartphone.

RELATED: Oura vs. Circular Comparison

Circular Smart Ring replacement shell


Here is a rundown of the features included in Circular:

Alarm Clock – Smart, non-invasive and silent. Circular studies the user’s sleep and smoothly wakes them up during the light sleep stage via silent vibrations. Includes wake up score, smart alarm, smart snooze, week overview

Sleep Tracking – Analysis of body signals during sleep to keep track of sleep efficiency while helping the user to improve sleeping quality. The data includes: sleep quality score, sleep overview, sleep metrics, sleep graphs, and actionable recommendations.

Activity Tracking – Quantified physical activities with metrics. Includes: activity overview, activity metrics, activity graphs, actionable recommendations

Wellness Monitoring – Monitors overall wellness and energy with day & night advanced cross analyses. Includes: wellness metrics, energy score, wellness graphs, actionable recommendations

Alert notifications – Calendar, reminders, timer or social notifications right on the user’s finger with discreet vibrations.

Push button – Immediate action on the things a user does most. Control devices via the ring’s button.

Streaks & badges – Users receive badges for good performance in the Circular community.

Leaderboards – Users can share their wellness performances and feel ready to compete among the top
individuals in the Circular community.

Customized Feed – A user’s feed displays only the recommendations correlated to the circles they have

Calendar – Quickly visualize what’s happening, add notes and make extra correlations to progress
towards a goal.

Kira – An integrated intelligent voice assistant companion that delivers smart and tailor-made insights at the right moments.


The Circular application provides the user with specific health and personal performance insights based on the monitored data. Firstly, the baseline data is established for the user. The collected data will be compared to the baseline by a dedicated AI engine that will then provide personalized advice to the user.

Circular is, first and foremost, a wellness and fitness device, and the application underlines this focus. The application offers a modular design for the features supported – the user can add and delete different modules. In the future, new releases of the features, so-called circles, can be added.

Circular Smart Ring – Smartphone App


Circular Smart Ring is currently available for pre-sales on the Kickstarter crowdfunding platform.


Sleep Tracking and Improvement
Stress Level Monitoring and Management
Heart Rate Measurement and Monitoring
Yes. Infrared heart sensor
Blood Oxygen Sensor
Yes. Sp02 sensor
Sleep Apnea Screening
Step Counter for Activity Tracking
Public Travel Pass
Contactless Payment
Access Card/Badge
Voice Assistant Controller


Bluetooth for Wireless Connection
Gyroscope Sensor
NFC - Near Field Communication
Water Resistance
Battery Life/Passive device with no battery
2 days. Charging 60 mins.
Smartphone and Computer Operating System (OS) Support
iOS 11+, Android 6.0+


Is the product available for purchases?
Pre-sale on Kickstarter
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