No new hardware
The camera, flash, and accelerometer already in the phone become the sensor. Nothing to buy, ship, charge, or replace.
Our mission
Health shouldn't depend on your postcode
Whether a warning sign in your heart is caught early should not come down to how much money you have, how far you live from a clinic, or whether the one blood-pressure cuff in the district happens to be free that day. VitalVein is a youth-led effort to change that — by turning a device billions of people already carry into a basic vitals check.
A minute, a phone, and no extra hardware should be enough to tell someone whether their heart needs a closer look. We are building toward a world where that first check is available to anyone, anywhere — online or off, rich or poor.
The VitalVein mission
The problem
The tools to catch heart trouble early are missing exactly where they're needed most
Cardiovascular disease is the world's leading cause of death — and the burden falls hardest on the communities with the fewest resources to screen for it. Much of that harm is preventable, if the warning signs are caught in time.
17.9M
Lives lost to cardiovascular disease each year
3 in 4
Of those deaths are in low- and middle-income countries
1.28B
Adults living with high blood pressure worldwide
~1 in 2
Of them unaware they have it
Figures: World Health Organization.
A cuff or an oximeter shouldn't decide who gets checked
The equipment that makes a routine vitals check possible — a digital blood-pressure cuff, a pulse oximeter, a haemoglobin analyser — costs money, needs power and calibration, and simply isn't there in a great many clinics, schools, and villages.
So the check doesn't happen. A rising blood pressure goes unnoticed until it becomes a stroke. Anaemia in a pregnancy is missed until it becomes an emergency. The gap between "could have been caught" and "caught too late" is, very often, a gap in access to a simple device.
The cost of a basic vitals check today
~$40Pulse oximeter (SpO₂ + pulse)
~$100Digital blood-pressure cuff
…plus power, calibration, spare parts, and someone trained to run them
$0VitalVein, on a phone people already own
Our approach
Meet people where they already are — on the phone in their pocket
Every design decision follows from one question: will this still work for a health worker in a village with no signal and a three-year-old phone? If the answer is no, it's the wrong decision.
Works with no signal
Everything runs on the handset, so the tool works in a basement clinic or a field visit — the places a cloud service quietly fails.
Private by default
Data never leaves the device, so dignity and confidentiality don't depend on trusting a distant server — see Privacy.
What we stand for
The principles we won't trade away
A health tool for underserved communities carries a heavier duty of care, not a lighter one. These are the commitments we hold ourselves to.
Equity first
A basic vitals check should reach the people currently priced or distanced out of one — that is the point of the project, not a side effect.
Dignity & privacy
Health data is personal. It stays on the user's own device, under their control, and is theirs to delete — no accounts, no silent uploads.
Honesty over hype
Every estimate carries a confidence score, and we say plainly what the app is not. A false reassurance is worse than no reading at all.
Fair across skin tones
Optical methods have a documented history of working worse on darker skin. We treat skin-tone accuracy as a core problem to solve, not a footnote.
Accessible everywhere
Offline-first, low-end hardware, no subscription. If a feature only works for people with fast phones and fast internet, it fails the mission.
Open to scrutiny
We validate against reference equipment and publish our limits. Trust in a health tool has to be earned in the open, not asserted.
Where we're headed
The roadmap — and we're honest about where we are on it
VitalVein is early. These are the milestones we're working toward, in order, rather than claims about what is already done.
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Validate rigorously
Test every estimate against clinical reference equipment across a deliberate range of skin tones, ages, and phone models — and publish the results, including where we fall short.
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Partner where the need is greatest
Work alongside clinics, community health programmes, and NGOs so the tool is shaped by the people who would actually use it in the field, not designed for them from a distance.
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Keep the basic check free
A first-line vitals screen should never sit behind a paywall. Our commitment is that the core screening function stays free at the point of use.
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Open the methodology
Document how the signal processing works so clinicians, researchers, and other builders can check it, improve it, and adapt it to their own communities.
The bigger picture
Aligned with the UN Sustainable Development Goals
VitalVein's mission maps directly onto two of the global goals the world has agreed to work toward by 2030.
Good health & well-being
Widening access to early cardiovascular screening supports the goals of reducing premature death from non-communicable disease and moving toward universal health coverage.
Reduced inequalities
Putting a capable screening tool on the phones people already own is a direct attempt to close the gap between who can access a vitals check and who cannot.
Everyone deserves to know what their heart is telling them
That belief is the whole project — a basic vitals check anyone can reach, on the phone already in their pocket.