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Latest
7 min read
5 Best Sleep Tracking Devices of 2026: Which One is Worth Your Money?
March 11, 2026
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Sleep
Product updates
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News
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The Circular Ring 2 Kickstarter Campaign Is Live – A New Era for Personalized Health
March 14, 2025
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How to Use Your HSA or FSA to Purchase the Circular Ring
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Discover the New Coherence Breathing Circle in the Circular Ring
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Expert
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Activity
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Rested Heart Rate (RHR): What Increases and Decreases it ?
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How Circular tracks your Resting Heart Rate (RHR) and how to use it?
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Activity
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How to use Heart Rate Variability (HRV)
August 23, 2019
Activity
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What increases and decreases Heart Rate Variability (HRV)?
August 23, 2019
Activity
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Continuous Heart Rate monitor
August 11, 2019
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6 / 7
Sleep
2 min read
Beat Sleep Inertia and Wake Up Alert: How Circular's Smart Alarm and Wake-Up Score Revolutionize Mornings
March 8, 2024
News
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Stress Levels Tracking: Your Path to Inner Peace
October 18, 2023
Sleep
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What is the Circular® Sleep quality score and how it is calculated
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Sleep
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What is the Circular® Wake up score and how it is calculated
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Sleep
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Circular® smart snooze: Embrace Circular's Smart Snooze Feature for Energized Mornings
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Sleep
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Unveiling Sleep Secrets: Decoding Your Heart Rate Trend During Sleep with Circular Ring
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1 / 7
News
1 min
Kickstarter Campaign - Update #2
February 18, 2020
News
1 min
Kickstarter campaign - Update #1
February 16, 2020
News
1 min
Circular is LIVE on Kickstarter
January 28, 2020
News
1 min read
How to change the interchangeable shell of my Circular Ring
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News
2 min
Circular update: Exclusive content, CES, Kickstarter ...
January 20, 2020
News
1 min read
Circular is on Product Hunt!
October 2, 2019
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