The wearable band designed for chronic fatigue
For people living with chronic fatigue, Visible helps you understand your energy, pace your days and spot what drains you.
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Take the guesswork out of pacing
Visible turns your body’s data into a daily energy budget with insights you can actually use. If you’re heading over budget, it’ll let you know, so you can slow down before your symptoms catch up.
This app has been a life saver for me. I struggle with pacing and experience PEM when I push myself too far. Being able to see where by body is at and pace myself accordingly has been so helpful.
Jessica, via TrustPilot
A chronic fatigue tracker that shows what drains your energy
If you live with chronic fatigue, you already know activity affects your energy differently. The same walk can feel manageable one day and draining the next, depending on how you slept or what else you've done.
Visible tracks your heart rate and heart rate variability to show how your body responds, so you can learn your patterns and plan your days with confidence.
It is so eye opening seeing all the different things that cause my body to be in over exertion mode. Simple tasks that normal bodied people can do without so much as breaking a sweat.
Kaylee, via Trustpilot
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Make Visible progress
Chronic fatigue is different for everyone, so it can be hard to make sense of your symptoms. Visible tracks your activity, symptoms, medication and biometrics in one place. See the patterns behind your days and the impact of changes as you make them.
Choose to share your data securely with your clinician through the Clinician Dashboard. A clearer picture of your day-to-day life makes it easier to have better conversations about your care.
As someone newly diagnosed with CFS, POTS, and PEM, Visible has been crucial for understanding my boundaries. This is my first time ever leaving a product review, but the impact on my quality of life has been incredible.
Amy, via Trustpilot
Support your nervous system
With chronic fatigue, your body can get stuck in ‘fight or flight’ mode. This is the body’s natural response to stress or danger, preparing it to respond quickly. But when this response stays active for too long, it can take a toll on the body.
Slow, controlled breathing can help shift your body into a restful state. Visible calculates your optimal breathing rate and guides you with real-time feedback.
Breathing exercises a game changer for me. Can't recommend enough to anyone with a health issue where pacing yourself is needed to get better.
Aneaka, via Trustpilot
In collaboration with leading educational and research institutions
Built by a team who understands
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Harry is Co-founder of Visible. An engineer by training, he began his career in Formula 1 and electric vehicles before developing Long Covid in 2020. Despite being seriously unwell, his tests came back normal and his symptoms were attributed to anxiety or deconditioning.
He turned to fitness trackers to better understand his health. But they tracked workouts, not rest, and pushed people to do more, not to pace.
In 2022, he set out to build a wearable designed around the needs of people with complex chronic illness.
His ambition is to transform how we understand and treat these conditions, giving people greater understanding and support for their health while accelerating research towards better treatments and cures.
Oonagh is Brand Lead at Visible. A former professional rower with the British Rowing Team, she was pre-selected for the Tokyo Olympics before developing Long Covid and ME/CFS, which forced her to retire from professional sport.
Her experience led her into research and advocacy. She has spoken widely in the national media about the need for greater scientific understanding and better care, and completed a research fellowship at the University of Oxford studying Long Covid.
At Visible, she brings these experiences together to lead the company’s brand and communications, working to change how complex chronic illness is understood and accelerate progress towards better care and treatments.
Jemma is Social Media Manager at Visible. Before developing Long Covid, she was a secondary school science teacher. Her illness forced her to leave teaching, and she began sharing her experience of chronic illness online.
Today, she is one of the most recognisable voices in the chronic illness community. She has built an audience of hundreds of thousands with her honest, often hilarious take on life with chronic illness.
She brings that same creativity and understanding of chronic illness to Visible, shaping how we reach, connect with and support people living with these conditions.
Ed is Head of Member Support at Visible. Before joining the team, he held a senior leadership role at a London school. After developing Long Covid, he had to leave teaching and became involved in efforts to improve understanding of these poorly understood conditions.
At Visible, he combines his firsthand experience of illness with his background in education to ensure members receive thoughtful, informed support that reflects the realities of living with complex chronic illness.
Janna is Director of Clinical Affairs and Research at Visible. While at college, an Epstein-Barr virus infection left her with severe post-viral fatigue. The experience inspired her to train as a clinical health psychologist to support others living with health challenges.
After earning her PhD, she researched how technology could improve access to evidence-based healthcare for underserved communities. She also established an independent psychology practice supporting people with chronic illness and pain.
At Visible, she works to make evidence-based tools for living with chronic illness more accessible, ensuring they are grounded in science, measuring their impact and helping bring Visible into healthcare settings at little or no cost to patients.
Paul is Head of Data Science at Visible. Before joining the team, he spent 15 years working in technology and data science on social impact projects across education, public health and social care. He holds a PhD in Computer Science.
Paul developed ME/CFS in 2022. After a difficult year trying to understand what was happening to his health, followed by another year of medical tests and appointments, he was finally diagnosed in 2024.
At Visible, he combines his firsthand experience of illness with his technical expertise, turning the data members share into tools they can trust and advancing scientific understanding of these conditions.
David Putrino is Director of the Cohen Center for Recovery from Complex Chronic Illness (CoRE) at Mount Sinai in New York, a leading US center for Long Covid, ME/CFS and related infection-associated chronic illnesses. He leads clinical trials investigating new treatments for these conditions and also serves as Director of Rehabilitation Innovation for the Mount Sinai Health System and Professor at the Icahn School of Medicine.
David is a scientific advisor to Visible and collaborates with the team on research to better understand what drives symptoms and how people living with complex chronic illness can better manage their health.
Boon Lim is a Consultant Cardiologist and Electrophysiologist at Imperial College Healthcare NHS Trust in London, specialising in heart rhythm conditions and autonomic disorders, including fainting (syncope), POTS and Long Covid.
He has published more than 100 peer-reviewed papers, many exploring the relationship between the autonomic nervous system and heart health. He is also the founder of StopFainting.com and author of Keeping Your Heart Healthy, published as part of Penguin’s Life Expert series.
Boon is a scientific advisor to Visible, bringing his expertise in autonomic function and heart rate variability to the development of Visible’s technology and research.
What you get with Visible
Visible combines membership to our award‑winning app with a wearable heart-rate monitor.
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App membership
Visible membership gives you access to the app. It translates biometric data gathered from your band into personalized pacing guidance.
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The Visible band
A screenless, waterproof, durable band which tracks your heart rate continuously. Built by a world leader in heart-rate monitoring technology.
Move the science forward, together
Join studies in the app
Volunteer to share anonymized data and contribute to new research
Find clinical trials
Explore clinical trials, matched to your diagnosis and location.
See what we’re learning
Read peer-reviewed research and insights from Visible and our research partners.
Visibility brings change
Frequently asked questions
Pacing is a strategy for balancing activity and rest to avoid triggering chronic fatigue symptom flare-ups. It's widely recommended by health organizations including the USA’s Centers for Disease Control and Prevention (CDC) and the UK’s National Institute for Health and Care Excellence (NICE). Instead of pushing through and crashing afterwards, pacing helps you stay within your body’s capacity consistently, so you can do more over time.
Yes. Visible can be used as a chronic fatigue tracker, helping you understand how you are spending your energy and make more informed decisions about when to rest.
Visible uses continuous heart rate tracking to show how much effort your body is putting into everyday activities, using a personalized measure called PacePoints. The more demanding an activity is on your body, the faster your PacePoints add up.
You can see how many PacePoints you’ve used throughout the day and set a personalized daily budget to help you decide when to slow down or rest, supporting you in staying within your body’s capacity.
No. Chronic fatigue describes persistent exhaustion that can have many different causes. ME/CFS (myalgic encephalomyelitis/chronic fatigue syndrome) is a specific chronic illness that involves more than fatigue alone.
A defining feature of ME/CFS is post-exertional malaise (PEM), where symptoms become worse after physical, mental or emotional activity, sometimes hours or days later. People with ME/CFS may also experience unrefreshing sleep, brain fog, pain and dizziness.
Pacing can be helpful for both people living with chronic fatigue and ME/CFS.
No. Visible is a wearable designed for general information and education, not a medical device. It isn't intended to diagnose or treat chronic fatigue, and you should always consult a doctor before making medical decisions.