Blood Pressure Log
Log systolic, diastolic and pulse over time.
Overview
The Blood Pressure Log is a private, lightweight tracker for systolic, diastolic, and pulse readings. Whether you are managing hypertension, recovering from a cardiac event, or simply curious how your numbers shift between morning coffee and evening wind-down, the log gives you a chronological record you can hand to a clinician without juggling paper notebooks or spreadsheet columns.
Each entry is stamped with the date and time you took the reading and can carry an optional note describing context such as posture, recent caffeine, stress, or medication timing. Over weeks and months the readings stack into a picture of cardiovascular trends that a single doctor visit cannot capture, helping you and your provider make data-driven decisions about diet, exercise, and treatment.
How it works
When you submit a reading the tool stores the moment in UTC so the timeline stays accurate across travel and daylight-saving changes, then renders the local date and time in the list. Once you accumulate readings it computes averages for systolic and diastolic, the percentage of readings within the conventional 120/80 range, and a rolling trend that compares the last seven readings against the previous seven so a slow drift is visible early.
Inputs are clamped to physiologically plausible ranges (systolic 40 to 260, diastolic 30 to 180, pulse 20 to 220) to catch typos before they pollute your history. Readings are private to your account and can be deleted individually if you mistype a number.
Examples
- Morning baseline: take a seated reading after five minutes of rest, log 118/76 with pulse 64, and note "before coffee, fasted."
- Medication tracking: log a reading two hours after a new antihypertensive dose to confirm the prescribed effect on systolic numbers.
- White-coat check: capture home readings the week before a clinic visit so you can demonstrate the gap between home and office measurements.
- Lifestyle test: log paired morning readings across two weeks before and after cutting salt to quantify the change.
FAQ
How many readings should I take per day? Most home monitoring guidance suggests two morning and two evening readings, a minute apart, with the average being the reported value. Log each reading separately so the averages reflect real variability.
What is considered in range? The tool flags readings at or below 120/80 as in range, matching the common normal threshold. Your clinician may use a personalised target, especially if you are older or have diabetes.
Why does the trend only appear after fourteen readings? A trend compares the most recent week against the prior week. With fewer than two weeks of data the comparison is statistically meaningless and is hidden to avoid misleading numbers.
Can I export the history? All entries persist to your account and remain available for review. Future export options are tracked separately from this tool.