Questions, answered plainly

A wellness service for heart health, built around the one number you can measure at home. Three parts.

• The free app. Guided readings, a confidence score on every one, and insights that name what moved your number.
• Guided wellness programs. Short journeys across sleep, salt, movement, stress and more, each small enough to actually do.
• The BP Check-Up. Seven days that show how your blood pressure really behaves, not what it happened to be in one moment.

Cento sits alongside your healthcare, never in place of it.

Adults who want to understand their blood pressure at home. Usually one of four people.

• Your doctor mentioned a borderline reading and asked you to keep a log.
• You take blood pressure medication and want to see it working.
• Your readings jump around and you do not know which one to believe.
• Nothing is wrong yet, and you would rather know early than late.

You need your own blood pressure monitor. Cento records and explains readings, it does not take them. And Cento is for adults 18 and over.

No, and it is not built to. Cento is a wellness companion, not a diagnostic tool, and it does not prescribe, treat or diagnose anything.

• Your doctor stays the person who diagnoses and prescribes.
• Cento adds what a short appointment cannot. A week of readings taken properly, with a record of how each one was taken.
• Take that record to your appointment. It is your data.

For anything about your health, speak to your doctor. If you feel unwell, contact a healthcare professional or your local emergency number now.

Write to us. A real person answers, usually within one working day.

• The contact form. Fastest.
• Email, hello@centocare.com.
• Post, First to Smile Holdings Ltd., Suite 71 to 75 Shelton Street, Covent Garden, London WC2H 9JQ, United Kingdom.

Please leave out health details you would rather keep off email.

Seven days that show how your blood pressure really behaves. Not what it happened to be one morning in a waiting room. Available in the United States.

• Two readings, one minute apart, twice a day, for seven days. The 722 protocol.
• Every reading coached in the app, with the five minute rest timed for you.
• Your monitor and cuff checked before the week starts.
• A confidence score on every reading, so you know which numbers count.

The result is a week of readings taken the same way. It is what the guidelines ask for, and what almost nobody manages on their own.

A guided journey through one thing that moves blood pressure. Steps small enough to fit a normal week.

• Short reads, audio and video. Never a wall of text.
• Real subjects with real evidence. Hidden salt, the DASH plate, brisk walking, sleep, stress, alcohol, weight, medication routines.
• Every claim names the study it came from.

No program promises an outcome. It shows you what the evidence supports and leaves the decisions to you and your doctor.

The app is free. The whole app, not a trial.

• Free, and staying free. Guided readings, confidence scores, insights, the seven day log, the lifestyle journeys.
• Free with no app and no account. The tools on this site.
• Separate services. Cento's guided programs and the BP Check-Up.

Want to know when those open? Write to us through the contact form and you hear first.

Start with the app. That is where your readings live and where every program runs.

• Download it and complete your first week. The 722 protocol is the foundation everything else builds on.
• Set up your monitor and cuff first. Three minutes, once. It decides how good every later number can be.
• Then register your interest through the contact form.

The app works worldwide, in English for now.

• The BP Check-Up is available in the United States only.
• Guided programs open by region. Ask us through the contact form and we will tell you what is available where you are.

Yes. No phone or watch can measure blood pressure, and Cento will never pretend otherwise.

• A validated upper arm monitor is what the evidence supports at home.
• Wrist monitors can be logged, but they are not equivalent, and Cento says so.
• Finger and cuffless devices are not suitable.

Do not own one yet? Run the Device Check on this site first. It takes about a minute.

Any brand. Cento is not tied to a manufacturer and never sells you a device.

• Enter your brand and model. Cento tells you what the independent registries say about it.
• The registries are the AMA's validatebp.org and STRIDE BP.
• Legal to sell is not the same as validated. Plenty of monitors are cleared for sale with no validation study behind them.

If your model is not listed, Cento says so plainly rather than guessing.

Four things, in order.

• Upper arm. Not wrist, not finger.
• On an independent validation registry. Only a minority of monitors sold online are.
• A cuff that fits your arm. Measure around the middle of your upper arm and match the range printed on the cuff, not a size name.
• Memory for two people if the monitor is shared.

More than 1 in 3 adults need a cuff other than the standard size, and the wrong size shifts a reading by 4.8 to 19.5 mmHg. Ishigami et al., JAMA Internal Medicine, 2023, and NHANES.

You take the reading. Cento handles everything around it.

• Before. A five minute rest, timed. A short checklist so nothing gets missed.
• During. Two readings a minute apart, averaged. A third if the first two disagree too much to trust.
• Recording. Point your camera at the display and Cento reads the numbers. Or type them. Correct either before saving.
• After. A confidence score from 0 to 100, and a note on what moved the number.

About eight minutes, start to finish. Works offline, syncs when you are back.

It scores how well the reading was taken. Not the number, and not you.

• It weighs rest, posture, arm position, cuff fit, caffeine, talking and time of day.
• The weights come from published research, not house opinion.
• High score, a number worth weighing. Low score, just a noisy moment.

Over a week the scores tell you how much of your pattern is real. That is worth more than any single reading.

If you feel unwell, contact a healthcare professional or your local emergency number now. Do not wait to finish a week of readings.

• One high number and you feel fine? Sit quietly for five minutes and take it again properly. A single reading includes the moment you worried about it.
• A pattern across days that worries you? Take the log to your doctor rather than reading it alone.
• Cento does not tell you what your numbers mean for you. That conversation belongs to your doctor.

iPhone and Android.

• The current version of each operating system, and the two before it.
• No web version of the app. The tools on this site work in any browser, no account needed.

No, and that is a choice, not a gap.

• Bluetooth would tie Cento to a short list of monitors. Most people already own one that is not on it.
• Instead, snap a photo of the display. Cento reads the numbers off it. The monitor already in your drawer works, no pairing, no new purchase.
• You can always type the numbers, and correct what the camera read before saving.

Garmin, Apple Health, and Health Connect on Android.

• What comes in is sleep, activity and recovery. The context around a reading, never the reading itself.
• No watch measures blood pressure. Cento never treats wearable data as if one did.
• Connecting is optional. Everything works without it.

What it buys you is answers. Cento lines your readings up against your own sleep and activity and shows you which of them moved your number.

What changed a reading, and by how much.

• Thirteen causes, each with a fix, ranked by how much they affected your readings specifically.
• Comparisons from your own data. Your morning readings on your shortest nights against your longest, for example.
• And when there is nothing to fix, Cento says so.

Insights are observations about your own pattern. They are not medical advice.

Twice a day, at times you choose.

• Gentle nudges, nothing more.
• Never a health detail in the notification itself.
• A missed day stays neutral. It never counts against you.

And every Sunday, a recap arrives on its own.

One profile per person, for now.

• Scores, insights and journeys are built around one person's pattern. Mixing two people's readings would make all three wrong.
• Shared household profiles are on the list. The app will say so when they arrive.

Yes, from Settings in the app, or from this site, and the deletion is permanent. You do not have to ask us or wait for a reply.

Encrypted in transit and encrypted where it rests.

• The full detail is in the Privacy Policy.
• How consumer health data specifically is handled is in the Consumer Health Data Privacy notice.
• What we do and do not set in your browser is in the Cookie Notice.

All three are also linked at the foot of every page.