Pulselog - Blood Pressure Log
Pulselog is a simple blood pressure diary. Each entry holds your systolic and diastolic pressure, an optional pulse rate, the date and time, the situation you measured in (after waking, before sleep, before or after a meal, after exercise, or other) and a free-text note for things like how you felt or when you took your medicine.
The home screen shows your latest reading with a category label and this month's averages. A history list, a line graph over a week, month, three months, six months or a year, and a calendar view help you see patterns instead of isolated numbers.
It is meant for people who have been asked to check their blood pressure at home, or who simply want an easy record to show their doctor at the next appointment. Everything is kept in your own browser — there is no account and nothing is uploaded.
The app runs entirely in your browser. What you enter is saved only on this device.
How to use Pulselog
- Read the disclaimer. On the first visit a short medical disclaimer appears. Pulselog stores and charts your numbers; it does not diagnose anything. Tap I Understand to continue.
- Add a reading. Tap the Record button at the bottom right. The date and time default to now and can be changed by tapping them. Enter the upper (systolic) and lower (diastolic) values in mmHg and, if you have it, your pulse in beats per minute.
- Choose the situation and add a note. Pick when you measured — after waking, before sleep, before a meal, after a meal, after exercise or other — and type an optional note. Then tap Save.
- Check the home screen. Your latest reading appears with a colour-coded category and the guideline it is based on, followed by this month's average blood pressure, average pulse and number of readings.
- Review the history. The History tab lists every reading, newest first. Tap a reading to open it, where you can change the values or delete it.
- Look at trends. The Graph tab draws systolic and diastolic lines for the period you select, from one week to one year. The Calendar tab marks days with readings; tap a day to see that day's entries.
Features
- Systolic, diastolic and optional pulse for each reading
- Editable date and time
- Measurement situation: after waking, before sleep, before or after meals, after exercise, other
- Free-text notes
- Category label for each reading based on the AHA/ACC categories
- Monthly averages for blood pressure and pulse on the home screen
- Line graph for 1 week, 1 month, 3 months, 6 months or 1 year
- Calendar view of readings by day
- Edit and delete any reading
- Medical disclaimer and reference information inside the app
Measuring blood pressure at home: a practical guide
What the two numbers mean
Blood pressure is written as two numbers, for example 118/76 mmHg. The first, systolic pressure, is the pressure in your arteries when the heart contracts. The second, diastolic pressure, is the pressure while the heart relaxes between beats. Both matter, and a single reading can change a lot from minute to minute — that is why a series of home readings is often more informative than one measurement at a clinic.
The categories used for adults
The American Heart Association and American College of Cardiology describe adult readings in broad groups: normal (below 120 and below 80), elevated (120–129 and below 80), stage 1 high blood pressure (130–139 or 80–89), stage 2 (140 or higher, or 90 or higher). Readings above 180 and/or above 120 are described as a hypertensive crisis. Other countries use slightly different thresholds; Japan's guideline, for instance, uses lower limits for home readings than for clinic readings.
These categories describe averages over time, not a single number. Only a doctor can diagnose high blood pressure. If you get a very high reading, rest a few minutes and measure again; if it stays very high, or you have symptoms such as chest pain, shortness of breath, weakness, vision changes or difficulty speaking, seek emergency care.
How to get a reliable reading
Use a validated upper-arm cuff of the right size for your arm. Avoid caffeine, smoking and exercise for 30 minutes before measuring, and empty your bladder. Sit with your back supported, feet flat on the floor and legs uncrossed, with your arm resting on a table so the cuff is at heart level. Rest quietly for five minutes, don't talk during the measurement, and place the cuff on bare skin.
Many guidelines suggest taking two readings a minute apart, in the morning before medication and breakfast and again in the evening, for several days before an appointment. Writing down the situation — after waking, before sleep — is exactly what the situation buttons in Pulselog are for, so morning and evening values can be compared fairly.
Using your log with your doctor
Bring the history or graph to your appointment rather than a single remembered number. Notes about missed medication, poor sleep, pain or stress can explain unusual readings. Never change or stop medication based on home readings alone; discuss the trend with your doctor or pharmacist.
Frequently asked questions
Where is my data stored?
Only in this browser on this device, in its built-in storage (IndexedDB). There is no account and nothing is sent to a server. Clearing site data for this website, or using a private window, deletes your readings, so don't rely on it as your only copy.
Can Pulselog measure my blood pressure?
No. You need a blood pressure monitor; Pulselog only records the values you type in and shows them as lists, charts and averages.
What do the category labels mean?
They place each reading in the adult categories published by the American Heart Association and American College of Cardiology. They are for orientation only and are not a diagnosis; a doctor considers many readings and your overall health.
Can I record a reading without a pulse?
Yes. Pulse is optional, and averages for pulse only use readings that include it.
Can I use it on several devices?
Each browser keeps its own separate log. There is no syncing between devices or with the phone app.
How is the web version different from the Android app?
Recording, history, graph and calendar work the same way. The app stores data on the phone and offers an optional ad-free upgrade; purchases are not available on the web.
Limitations of the web version
- Data stays in this browser only; there is no backup, export or sync
- No reminders to measure are sent on the web
- The calendar's month and weekday names may appear in English even when another language is selected
- In-app purchases are not offered on the web
Disclaimer
Pulselog is a personal record-keeping tool. It is not a medical device and does not provide medical advice, diagnosis or treatment. Category labels are for general information only. Always consult a doctor or other qualified health professional about your blood pressure, and seek emergency care if you have a very high reading with symptoms.
Phone app
Pulselog is also available as an app for phones and tablets: