Get Systolic, Diastolic, and Pulse from Any Blood Pressure Monitor Photo
Manually reading three numbers from a monitor and typing them into a log takes ~30 seconds per measurement — this reads all three from a single photo in 5.
5s per reading · Up to 99% accuracy on clear LCD displays
What You Can Pull from a Blood Pressure Monitor Photo
With Custom Column Extraction, each value on the display becomes its own column.
The top, largest number. The AI identifies it by its position.
Second number directly below systolic. The AI reads it by its relative position underneath the top value.
Bottom-right corner, usually labelled "bpm" or next to a heart icon. The AI distinguishes it from BP readings by size, position, and unit indicator.
Heart icon that appears when the monitor detects an irregular rhythm. The AI records its presence as a Yes/No flag in your log.
Available on premium models that store readings with a timestamp. Captured as separate columns when visible on the display.
A Blood Pressure Screen Shows Three Numbers — But Doesn't Label Them
Traditional OCR reads digits without distinguishing them — all three values land in the same block. Semantic extraction reads the display layout to assign each to the correct column.
Why Manual Logging & Basic OCR Fall Short
Three similar numbers, no labels. The monitor displays 128, 82, and 71 — but basic OCR dumps them as a flat list. Sorting systolic from diastolic from pulse requires knowing the display convention.
Readings differ naturally. 132/85 then 128/82 one minute later — both valid, not an error. Blood pressure fluctuates. Manual loggers often discard the second reading, losing valid data.
Basic models lack timestamps. Entry-level monitors show the reading for a few seconds and power off. No memory. Users must note date and time — a step frequently skipped.
How Semantic Extraction Reads the Full Display
Name columns — AI maps by display position. Define "Systolic," "Diastolic," "Pulse." The AI reads the top number as systolic, the value below it as diastolic, and the bottom-right "bpm" value as pulse. The layout is consistent across home monitors.
Natural variation is preserved. Take three readings one minute apart and photograph each. The AI creates one row per measurement. Differences between them stay in the data — average later or share all three with your doctor.
A Notes column fills the gaps. Define "Notes" for date, time, or arm used. Basic monitors do not show a timestamp — the Notes column captures context in seconds per session.
From a Photo of Your Monitor to a Timestamped BP Log in Three Steps
Photograph the Monitor Display
After each measurement, photograph the display before it powers off. Hold the phone parallel to the screen to reduce glare. If your doctor recommends 2-3 readings, photograph each one and upload together.
Name the Columns Once
Type column names: Systolic, Diastolic, Pulse, Irregular Heartbeat, Date, Time, Notes. The AI maps the top number to Systolic, the one below to Diastolic, the bottom-right "bpm" value to Pulse, and the irregular heartbeat icon to its own column. One set works for every photo.
Download a Complete Log
Processing takes ~5 seconds per photo. The output is one XLSX — each row is a measurement with all extracted values and notes. Roughly 6x faster than typing manually (~30s per entry vs ~5s).
When It Works Best — and When to Be Cautious
When It Works Best
Clear, well-lit photos of the display. Monitor screens are small but high-contrast — a straight-on photo captures digits reliably in moderate light.
Standard display layout. Home monitors follow the same convention: systolic top, diastolic below, pulse bottom-right. The AI reads this pattern across brands.
Batch logging across days. Upload morning and evening photos over several days into one batch. Get one chronological health log to share with your doctor.
When to Be Cautious
Glare or reflections on the screen. Overhead lights can wash out segments. Hold the phone parallel to the display.
Non-standard display layouts. Some premium monitors use scrolling or condensed formats. Test one photo first to confirm the AI reads it correctly.
Visible data only — no clinical interpretation. The tool extracts what the monitor displays. It does not diagnose or interpret. Only photograph your own device. Share the log with your healthcare provider for review.
Frequently Asked Questions
How does the AI tell Systolic from Diastolic from Pulse when all three are just numbers on a small LCD?
The AI reads the display layout. The large number at the top is systolic, the one below is diastolic, and the smaller bottom-right value next to "bpm" is pulse. This pattern holds across home monitors.
I took three readings in a row and got different numbers each time — which one should I log?
Log all three. BP naturally varies by 5-10 mmHg between readings. Most guidelines recommend taking 2-3 readings one minute apart and averaging. The tool preserves each reading as a separate row — the trend over days is more meaningful than any single number.
Can the tool extract the Irregular Heartbeat icon from my monitor display?
Yes. Define a column called "Irregular Heartbeat" and the AI checks for the heart-shaped icon on the display, recording Yes or No. Some monitors show a solid icon for single detections and flashing for repeated ones — your Notes column can capture the type. Home monitors use this as a screening feature, not a diagnostic tool.
Can I mix blood pressure photos with glucose meter readings in the same batch?
Yes. Upload both into one batch, define columns like Systolic, Diastolic, Pulse, and Blood Sugar. The AI fills BP fields from monitor photos and Blood Sugar from glucose photos — unrelated fields stay empty.
My basic monitor does not show a date or time on the display — how do I add that to the log?
Define a "Notes" column and type the date and time manually — e.g. "Jul 14 AM — left arm." Premium monitors with a stored timestamp extract Date and Time automatically. For basic models, a consistent notes format takes seconds per session.
Deep dives: How AI handles medical data from photos — from lab reports to device displays · From camera to spreadsheet: turning health device photos into structured logs
See also the Glucose Meter guide for blood sugar tracking, or browse all photo-document scenarios.