Learn About Our Smart Ring

Learn & explore

Tips, guides and insights to get the most out of your Circular Ring.

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Find updated material to make the most out of Circular

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Health Metrics: What vital metrics are important to track? And why?

December 22, 2020

Tips to increase your Deep sleep

March 16, 2020

Bio-hacking Best Practices from Coach Siim Land

February 25, 2020

Kickstarter Campaign - Update #2

February 18, 2020

Kickstarter campaign - Update #1

February 16, 2020

Circular is LIVE on Kickstarter

January 28, 2020

Smart Ring vs Chest Strap: ECG Accuracy Compared

June 22, 2026

The Circular Ring 2 Kickstarter Campaign Is Live – A New Era for Personalized Health

March 14, 2025

How to Use Your HSA or FSA to Purchase the Circular Ring

August 27, 2024

Discover the New Coherence Breathing Circle in the Circular Ring

August 19, 2024

NBA Star Clint Capela Joins the Circular Tribe

June 20, 2024

Introducing the Medication Reminder Feature in Circular: A Leap Towards a Complete Wellness Ecosystem

February 29, 2024

Smart Ring vs Chest Strap: ECG Accuracy Compared

June 22, 2026

Stress Levels Tracking: Your Path to Inner Peace

October 18, 2023

Introducing Kira+: The Most Sophisticated Personalized Wellness AI Powered by Circular

July 20, 2023

Leaderboard Winner Interview (Audrey C.) - October 2022

December 13, 2022

How Circular tracks your Active minutes, Cardio points, Activity Volume, and Recovery

November 25, 2022

Circular’s calories burned

November 25, 2022

What Is a Normal Sleeping Heart Rate, and How Do You Measure It?

June 26, 2026

Can a Smart Ring Detect Sleep Apnea? What the Science Says

June 22, 2026

Beat Sleep Inertia and Wake Up Alert: How Circular's Smart Alarm and Wake-Up Score Revolutionize Mornings

March 8, 2024

Stress Levels Tracking: Your Path to Inner Peace

October 18, 2023

What is the Circular® Sleep quality score and how it is calculated

August 20, 2023

What is the Circular® Wake up score and how it is calculated

August 3, 2023

Major Product Upgrade 1

March 16, 2023

New release: Guided Breathing Exercises Circle

October 12, 2022

The Circular® Global Score, Leaderboard and Streak score

October 12, 2022

Circular Delivery Update #2

June 10, 2022

Circular Delivery Update #1

May 25, 2022

Kickstarter Campaign - Update #2

February 18, 2020

Learn & explore

Understanding VO2 max: why is it useful?

Circular Ring 2: The First and Only Smart Ring with FDA-Cleared ECG

Introducing Kira: The World First AI Health Coach in a Smart Ring

How Circular Invented the Silent Vibration Smart Alarm in 2021

How Circular Became the First Smart Ring to Estimate VO2 Max

Circular Pioneers the First Consumer Smart Ring with SpO2 Monitoring

Can a Smart Ring Detect Sleep Apnea? What the Science Says

Smart Ring vs Chest Strap: ECG Accuracy Compared

Circular Ring 2 vs Samsung Galaxy Ring: Which No-Subscription Smart Ring Is Better?

What Is a Normal Sleeping Heart Rate, and How Do You Measure It?

4 Best Non-Watch Fitness Trackers in 2026

Ultrahuman Ring Pro vs Circular Ring 2: Which is worth buying?

February 2026 Leaderboard Recap: Top 20 Users & Winner Interview

5 Best Smart Rings for Women in 2026

WHOOP vs Circular Ring 2: Which is Right for You?

What Makes the Circular Ring 2 Different from Every Other Smart Ring

Best Smart Rings Without Subscription in 2026 (Tested & Ranked)

5 Best Sleep Tracking Devices of 2026: Which One is Worth Your Money?

Circular Ring 2 vs RingConn Gen 2: Which Smart Ring Is Better?

6 Best Ways to Track Your Menstrual Cycle (With Pros and Cons)

Why Am I So Tired in the Morning? Common Causes and Fixes

Hot Flashes During Period: Are they Normal and How to Manage Them?

Smart Ring vs Smart Watch: Which is Better?

How to Get Over Jet Lag: 8 Pre and Post-Flight Tips

What Is a Smart Ring and How Can It Improve Your Life?

The Circular Ring 2 Kickstarter Campaign Is Live – A New Era for Personalized Health

Discover the New Coherence Breathing Circle in the Circular Ring

Circular Ring 2 Release Notes (March 2026): 5x Faster Sync, Offline Mode, and Scoring Refinements

14 Best Wellness Gifts for Mom This Mother's Day

16 Truly Impressive Gifts for the Mom Who Has Everything

Circular Ring Leaderboard: Wellness Score, Rankings and Monthly Prizes

Circular Ring 2 Release Notes (Jan 2026): Database Optimization, Server Performance Upgrade, and 2025 Year in Review

Circular Ring 2 Release Notes (Nov 2025): Shipping Complete, Infrastructure Evolving

Circular Ring 2 Release Notes (Oct 2025): Shipping Complete, Customer Support, Firmware Update

Circular Ring 2 Release Notes (Dec 2025): Database Migration, App 28.36.0, and Sync Stability Fixes

4 Best Health Trackers to Wear with a Classic Watch

Circular Ring 2 Release Notes (Sep 2025): Dedicated Sync Architecture, Faster Data Transfer & Sleep Tracking Improvements

21 Gifts for Your Wife: Best Options for Every Type of Woman

How to Recover From Burnout: 10 Proven Strategies to Feel Like Yourself Again

10 Thoughtful Valentine’s Gifts for Him (With a Quick Picker by Type)

How to Fix Shift Work Sleep Disorder: 8 Strategies That Actually Help

17 Luxury Gifts for Men Who Are Hard to Impress

How to Wake Up Easier: 12 Tips to Beat Grogginess and Start Fresh

How to Calculate Your Ovulation Window and Know When You’re Most Fertile

7 Great Breathing Exercises for Stress Relief That Actually Work

Why ECG is a Game Changer in Circular Ring 2 — And How to Use It Right

How to Use Your HSA or FSA to Purchase the Circular Ring

Circular Partners with Sweatcoin for an Exciting World Wellbeing Week June Challenge!

NBA Star Clint Capela Joins the Circular Tribe

Explore Your Health Like Never Before with the Advanced Analytics Circle

Unleash Your Potential with the New Sport Session Circle

Beat Sleep Inertia and Wake Up Alert: How Circular's Smart Alarm and Wake-Up Score Revolutionize Mornings

Introducing the Medication Reminder Feature in Circular: A Leap Towards a Complete Wellness Ecosystem

Kira+ Beta: Revolutionizing Personal Health with AI-Powered Coaching

Stress Levels Tracking: Your Path to Inner Peace

Seamless Integration: Circular Ring Now Compatible with Google Fit"

Wellness Rewards: Introducing Circular Coins

Unveiling Sleep Secrets: Decoding Your Heart Rate Trend During Sleep with Circular Ring

Introducing Kira+: The Most Sophisticated Personalized Wellness AI Powered by Circular

Circular Ring Achieves Seamless Compatibility with Apple HealthKit

Introducing the latest upgrades to Circular Ring: Green LED and Improved Peak Detection Algorithm

Major Product Upgrade 1

Leaderboard Winner Interview (Audrey C.) - October 2022

New release: Guided Breathing Exercises Circle

Calculate Sleep to Know the Best Time to Go to Sleep

Average Resting Heart Rate by Age: All You Need to Know

Blood Oxygen: What is a Normal Level

Aerobic Exercises: The Best Tips

Average Body Temperature: All You Need to Know

Circular Delivery Update #2

Active Calories vs Total Calories: All You Need to Know

Circular Delivery Update #1

Dive into CBE - Circular’s Brain Engine

Recovery Heart Rate: All you Need to Know

Does your oxygen level drop when you lay down?

Bio sensors: What is It and How Do They Work?

Health Data Management: How to Use it To Get Healthier

Heart Rate Monitor: how to use it?

How Does a Pedometer Help People Reach Their Fitness Goals?