BP LogBP Log

Free blood pressure app for iPhone · by a preventive cardiologist

Know your numbers, before they become a diagnosis.

The habit that catches high blood pressure years before it shows up on an echo. Two easy readings, a minute apart, automatically averaged, synced privately to your own iCloud.

Download on the App Store
Free to log, always. No subscription.
dashboard trend view
SEE IT

A log you'll actually keep.

Know your numbers, before they become a diagnosis. Guideline-based blood pressure tracking, built by a cardiologist.
The two-reading protocol your doctor actually wants: matches the 2025 AHA/ACC guideline, timed and averaged in a minute.
The detail that helps manage it: patterns, variability, and medication correlation clinicians actually look at.
Every reading, never behind a paywall. Full history and CSV export are free.
Stays in sync with Apple Health. Import your history, then keep syncing automatically.
Log hands-free with Siri. Add "Log a Reading" to Siri, no app to open.
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WHY IT MATTERS

Why home readings, not just a checkup.

Designed by a preventive cardiologist

Built on the 2025 AHA/ACC guideline by a cardiologist who spends his days reading patient-kept blood pressure logs, most either disorganized or taken however felt convenient, not the way the guideline actually calls for. BP Log's guided flow builds the real two-reading protocol in, so the record you bring to your next visit is one your doctor can actually use.

1
It can be high for years and feel like nothing

High blood pressure has no symptoms most of the time. The only way to know is to check, not to wait until something tells you to.

2
One good reading at the doctor doesn't rule it out

A single office reading, months apart, misses the pattern. Home readings, checked consistently, are what actually catch it.

3
Catch the drift while it's still just a habit fix

Prehypertension caught early often responds to diet and lifestyle alone. Caught late, it's a prescription and years of damage already done.

4
Two taps, a minute apart, and it's logged

The guided reading walks you through both measurements and averages them for you. No spreadsheet, no paper log to lose.

WHY I BUILT THIS

He was in his late 30s, not overweight, and his heart had already started to change.

I was showing a patient how to use an automated blood pressure cuff when I noticed his reading was high. He was surprised. He figured it was just the stress of being checked. So we waited a few minutes and checked again. It was still high.

We got an echocardiogram. His heart had already started to change: the kind of change you see after years of pressure it was never built to handle.

He saw his doctor almost every six months. The last couple of visits, his blood pressure had been mildly elevated, and he'd been told it was probably “white coat,” nothing to worry about. He had never checked it at home. He had never been diagnosed with hypertension. He'd had it for years.

  • This is more common than it should be

    The data backs it up: undiagnosed, masked hypertension like his is far more common than most people (including most doctors) assume.

  • By the time it shows up on an echo, it's not early anymore

    As a cardiologist, I see the other end of this story too often: people who show up with a weakened heart after years of blood pressure nobody was tracking.

  • The tracking matters more than the extras

    I watch patients spend real money on whole-body MRIs and trendy lab panels through telehealth companies, when checking blood pressure at home regularly would have told them more, sooner, for free.

  • Catching it early can mean skipping medicine entirely

    A rising trend, or a big gap between your morning and night numbers, shows up long before you'd meet the formal criteria for hypertension. Catch it there, and diet and lifestyle changes alone often work.

That's the whole idea behind BP Log. Not another dashboard to check once and forget, but the two-minute habit that would have caught his hypertension years earlier, before it ever touched his heart.

It's also the record I wish more of my patients brought in. Most people who do track their blood pressure at home hand me a crumpled paper log or a random screenshot: one reading here, one there, no pattern I can actually use. I built BP Log the way I'd want that record kept: measured properly, organized automatically, ready to hand over.

Kaustubh, preventive cardiologist, tired of finding this out on an echo instead of a log.
WHAT'S INSIDE
Two readings, one number you can trust
FREE

The guided flow walks you through both readings, a minute apart, and averages them automatically, the way the 2025 AHA/ACC guideline recommends.

Know where you stand, and how often
FREE

Every reading is classified against the current guideline categories the moment you log it. Your dashboard also shows time in target, how often your readings land in range, right next to your average, because an average can look fine while half your readings sit above goal.

Stays in sync with Apple Health
FREE

Import your existing Health history once, then stay in sync going forward. Readings from a cuff, a Watch, or another app all show up in one place.

Log hands-free with Siri
FREE

“Hey Siri, log my blood pressure” and say the numbers. Logged without opening the app.

Your data, exportable anytime
FREE

Full raw history export, always. Your readings are never locked in.

Walk into your next visit prepared
FREE

A clean, printable report of your last month, organized the way a preventive cardiologist actually wants to see it. Hand it over instead of reading numbers off your phone.

Check for orthostatic drops too
FREE

A guided sitting-to-standing check for orthostatic blood pressure drops, built into the same log.

Your whole history, with Lifetime

Chart every reading you've ever logged, not just the last 3 months. Stretch your doctor report to 3, 6, or 12 months, choose its columns, and see how your orthostatic checks trend over time. One payment, no subscription, ever.

Logging readings, your dashboard, the doctor visit report, orthostatic checks, and full history export are free. BP Log Lifetime (one payment, no subscription, ever) unlocks your full chart history, doctor reports covering up to 12 months, and orthostatic trends over time.

QUESTIONS

Choosing a blood pressure app

Is there a truly free blood pressure app for iPhone?

Yes. BP Log is free to download, and logging readings, your dashboard, the doctor visit report, orthostatic checks and full history export stay free, with no ads and no subscription. An optional one-time Lifetime purchase adds your full chart history, longer doctor reports and orthostatic trends.

Can my iPhone or Apple Watch measure my blood pressure?

No. An iPhone can't measure blood pressure on its own, and Apple Watch can only notify you of a pattern that suggests hypertension, without giving you a number. For real readings, use a validated upper-arm cuff and log them in an app.

What Apple Watch can and can't do

Do blood pressure apps actually work?

An app doesn't measure anything; the cuff does. What a good app adds is the method (two readings a minute apart, morning and evening, averaged), the guideline categories, and a report your doctor can read in a minute.

A cardiologist's checklist for choosing one

Does BP Log work with Apple Health?

Yes. BP Log imports your existing Apple Health history once, then stays in sync, so readings from a Bluetooth cuff, a Watch, or another app show up in one place. You can also log by Siri, or from a Control Center or Lock Screen button.

Where is my blood pressure data stored?

On your iPhone, and in your own private iCloud account if you use iCloud. It never goes to a server we run.

Privacy policy

Who made BP Log?

Dr. Kaustubh Dabhadkar, a board-certified cardiologist focused on preventive cardiology. Dr. Dabhadkar built it around the way a cardiologist wants to see home readings when a patient walks in.

About the author

The next reading you take could be the one that catches it.

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