How it works
The Circl headset and app provide a seamless way to track mental performance and resilience.
Wearables, reimagined for brain health.
Wearable technology is becoming standard in both personal and workplace settings.
Unlike devices that track data continuously, the Circl headset measures brain activity in just minutes — offering precise, science-backed insights without the need for all-day wear.
STEP ONE
Take the test, get your score
Play a quick 4-minute game in the Circl app to measure your cognitive performance in real time.
Get instant results with a personalized brain score, giving you a snapshot of how your brain is performing today.
STEP TWO
Track changes over time
Monitor your cognitive performance to see trends and progress.
See how your brain is doing across days, weeks, or months.
Are your scores improving? What factors might be influencing them? The more you track, the more you’ll understand your brain’s unique patterns.
STEP THREE
Focus on improvement areas
Get clear recommendations to enhance mental resilience.
Choose a focus area — like sleep, physical activity, or mental stimulation — and set a timeframe to monitor.
Circl keeps you accountable with progress tracking, so you can measure the impact of your efforts.
Strengthen your mental resilience.
Prevent cognitive decline before it takes it’s too late. Get started on building better habits to support your mental wellbeing.
Your brain in action
Every moment, your brain processes visual information, rapidly interpreting the world around you.
This process triggers a measurable response known as a visually evoked potential (VEP) — a well-established scientific marker of cognitive function.
VEPs provide a reliable, repeatable measure of brain activity, making them the gold standard for assessing cognitive health and performance.
Circl harnesses this proven science to evaluate brain function.
Instant insights, backed by science.
Circl measures electrical signals at the scalp as you engage with short in-app games, delivering instant cognitive performance analysis.
Our technology provides key metrics that make brain function both measurable and actionable:
Brain Score
A comprehensive measure of your overall cognitive performance.
Brain Power
Assesses your brain’s ability to process information robustly and sustain mental energy.
Brain Speed
Measures how quickly and accurately your brain reacts to new information.
Alertness
Tracks your ability to stay aware and responsive to changes in your environment.
Focus
Measures your ability to concentrate and filter out distractions for better decision-making.
Memory
Evaluates how well you retain and recall important information over time.
The Circl Advantage
Precision Measurement
Circl delivers the most accurate assessment of cognitive health and performance, detecting brain changes linked to fatigue, chronic fatigue, burnout, and brain fog.
Effortless Integration
With just a few minutes of daily use, Circl delivers a clear picture of cognitive capacity, helping teams stay ahead of brain health challenges.
Real-Time Insights
Instant brain function reports provide early detection of potential concerns, helping teams make informed decisions and avoid prolonged exposure to stressful training environments.
Multi-User Capability
Designed for efficiency, the Circl headset is reusable—allowing organizations to monitor multiple individuals with a single device.
Baseline Data
Our technology establishes an individual cognitive baseline, enabling comparisons over time and against population data to objectively determine if cognitive function is within normal parameters.
Advanced Analytics
Backed by 60 years of neuroscience research, Circl’s analytics and brain stimulation techniques set the global standard for cognitive function measurement.
Protect your greatest asset.
We’re here to prevent cognitive decline before it’s too late.
By providing resources to support well-being, Circl helps organizations promote a culture that prioritizes both health and performance.
Our commitment to you.
Privacy, security and encryption
At Circl, we believe that your trust is our most valuable asset. That's why we're committed to complete transparency in how we handle sensitive brainwave data. We collect brainwave data solely for the purpose of providing personalized brain function insights and recommendations.
Trustworthy protections*
Brainwave data is encrypted using state-of-the-art protocols in transit and at rest. Every Circl policy has security as its foundational principle.
The only identifier in our system is a 26-digit randomly generated code. This numerical code simply associates test data to a user account. Circl doesn't have the ability to associate test data with you.
Importantly, our secure analytics engine is required to make raw test data readable. Without processing data through our analytics engine, test results are unintelligible.
*Encryption methods include Transport Layer Security (TLS) for data in transit and 256-bit AES security for data at rest (stored on servers). We periodically update our security practices to conform with Microsoft recommendations.
FAQs
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Yes, the Circl headset utilizes the same technology used in neuroscience labs for decades. The headset is a passive recorder of the electrical activity of your brain, it does not emit harmful energy in any form.
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Circl is not a medical device and is not meant to be a diagnostic tool. The Circl headset can assess your brain's resilience at a certain point in time and then help the user identify patterns over weeks and months of use. A lower score puts an individual at greater risk of developing a brain health issue. If users see a continual decline in their brain score over time, they may want to contact a medical professional to further explore their cognitive health.
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It’s natural to have daily ups and downs in brain performance. There are many biometric and lifestyle factors that affect cognitive function. Talk to your doctor if your brain performance continues on a downward sloping trend over a prolonged period of weeks or months.
A persistent negative trend is a concern and indicates a potential risk of a significant brain health issue.
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No. The Circl Headset has no way of knowing how intelligent you are. Rather, you will have a better understanding of how healthy and resilient your brain is.
However, by strengthening cognitive resilience, you can improve your ability to access and apply your intelligence more effectively. A more resilient brain supports clearer thinking, better focus, and enhanced problem-solving, allowing you to make the most of your cognitive potential.
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Circl is a world leader in mobile EEG digital signal processing. In technical terms, we detect brainwave data with an amplitude to 3 millionths of a volt with millisecond accuracy. The Circl headset measures your brainwaves more accurately than a heart rate monitor measures your heart rate.
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Only you or those you specifically decide to share the information with such as a family member or physician. Circl complies with all relevant privacy laws in the markets where our technology is available.
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No. The Circl headset is designed for stationary use in an environment with minimal distraction. Although it’s lightweight and comfortable, it’s not recommended for intense physical activities or exercise.