Keep a Blood Pressure and Sugar Log on Your Phone, and Show It to Your Doctor
"How has your pressure been?" Most of us answer with a guess. A simple log of your readings, kept on your phone and shared in a tap, turns that guess into something your doctor can actually use.
Many households now have a blood pressure machine and a glucometer. The readings get taken, glanced at, and forgotten, or written on the back of a calendar that never makes it to the clinic. Then at the appointment the doctor asks how things have been, and the honest answer is "mostly fine, I think".
A doctor adjusting your medicine wants to see the pattern, not one number: mornings versus evenings, fasting versus after meals, the last two or three weeks. That only exists if someone wrote it down.
⚠️ Before anything else
A log is for you and your doctor to look at together. It is not a diagnosis, and it is no reason to change a dose on your own. Follow your doctor's instructions on when and how often to measure, and contact them about readings that worry you.
What to write down with every reading
- The date and time. Blood pressure and sugar both change through the day, so the time matters as much as the number.
- Blood pressure: the top number (systolic), the bottom number (diastolic), and the pulse if your machine shows it.
- Blood sugar, with its context: fasting, before a meal, two hours after a meal, or at bedtime. A number without its context is hard to read.
- Weight, now and then, since it affects both.
Tips for readings that are worth comparing
1. Same time, same conditions
Measuring at the same times each day, for example after waking and in the evening, makes readings comparable. For blood pressure, a few minutes sitting quietly first is the usual advice.
2. Log it straight away
A number remembered an hour later is often a number misremembered. Record it while it's still on the screen, and if you forgot, add it later with the time it was actually taken.
3. Check the unit on your glucometer
Glucometers show sugar either in mg/dL (for example 110) or mmol/L (for example 6.1). Many sold in Bangladesh use mmol/L. To convert mmol/L to mg/dL, multiply by 18: 6.1 mmol/L is about 110 mg/dL. Write down which unit you used, and always use the same one.
4. Bring the last few weeks to the appointment
Two to four weeks of readings tell your doctor far more than a single good or bad day. Share them before the visit or show them on your phone.
The Health Tracker in Medicine & Health Reminder
Three tabs: weight (with BMI from your height), blood pressure (systolic, diastolic and an optional pulse) and blood sugar in mg/dL with a context such as Fasting. Each reading is stamped with the current time; tap it to log an earlier reading at its real time. Select the entries you want and share them as a tidy list by WhatsApp, email or any other app. Readings stay on your phone and are included in the optional Google Drive backup. It sits beside your medicine reminders and medical records, free, with no ads, in six languages. Not a medical device: readings are for personal tracking.
Get it on Google PlayMistakes to avoid
- Only logging the bad days. The good readings are what show whether the medicine is working.
- Mixing units. A few readings in mmol/L among mg/dL ones make the whole log confusing.
- Sugar without context. 160 after a meal and 160 fasting mean very different things.
- Adjusting medicine yourself. Bring the log to your doctor; let them decide.
The short version
Write every reading down with its time and context, keep the same unit, and take the last few weeks to your appointment. Your doctor gets a pattern instead of a guess, and you get a clearer picture of your own health.
Related reading
Frequently asked questions
How often should I measure my blood pressure?
Your doctor decides that; it depends on your condition and medicine. However often you measure, doing it at the same times and logging it straight away makes the log most useful.
My glucometer shows mmol/L. What do I do?
Multiply by 18 to get mg/dL (6.1 mmol/L is about 110 mg/dL). The app's sugar tab records mg/dL, so convert every reading the same way.
Are my readings sent anywhere?
No. They stay on your phone, and only go where you share them, or to your own Google Drive if you turn on backup.
Can I keep a log for my parents?
Yes. Keep the app on their phone, log their readings, and share them with you or the doctor when needed, so you have an up-to-date picture even from far away.