Blood Sugar Log: Glucose Diary

Blood Sugar Log is a simple, private logbook for your glucose readings. Log a reading in seconds, see your 7, 30 and 90-day averages, and share a clean PDF report with your doctor. Everything stays on your phone, no account needed. This app is a personal record only: it is not a medical device, does not diagnose, does not connect to meters and never suggests medicine or insulin doses.

LOG IN SECONDS
• Enter your blood sugar in mg/dL or mmol/L and switch units any time
• Tag each reading: Fasting, Before meal, After meal, Bedtime or Random
• Add a note, pick the time, save: that is all
• See straight away whether a reading is below, inside or above the target range you set with your doctor

YOUR NUMBERS AT A GLANCE
• Average, lowest and highest reading for the last 7, 30 or 90 days
• Time in range: the share of readings below, inside and above your target
• Average for each meal timing, so you can see whether mornings or evenings run high
• Estimated A1C from your 90-day average, clearly labelled as an estimate calculated from your own readings (ADAG study formula), never a lab result

A1C CALCULATOR
• Convert an average glucose into an estimated A1C, or an A1C into its estimated average glucose
• Works in mg/dL and mmol/L, shows A1C as % and mmol/mol
• Always available, unlimited

ONE PLAIN LOGBOOK
• Blood sugar, medicine taken and weight together on one timeline, grouped by day
• Keep a list of your medicines and log each dose with one tap
• Charts of your glucose trend with your target band, plus a weight chart

REPORTS FOR YOUR DOCTOR
• PDF report for any period: summary, averages by meal timing, current medicines, a daily logbook grid like a paper diary, and every reading
• CSV export for Excel or Google Sheets
• Share by email, WhatsApp or any app you like

NEVER LOSE YOUR HISTORY
• Your data stays on your phone. No account, no sign-in, no forced migration
• Create a backup file and keep it in Google Drive, email or Files
• Restore on a new phone in a few taps. Restoring only adds entries; it never deletes anything

REMINDERS
• Daily reminders to check your blood sugar at the times you choose, for example fasting in the morning and after dinner

MADE FOR EVERYONE
• Available in 24 languages, including Arabic, Urdu, Hindi, Bengali, Indonesian and Spanish, with right-to-left layouts
• Dark mode

FREE AND PREMIUM The first 30 readings are free, and you can add more by watching a short ad. Premium removes ads and the reading limit, with a one-time lifetime option or a monthly or yearly plan. Your history, charts, reports, backups and the A1C calculator are never locked.

IMPORTANT Blood Sugar Log records the numbers you enter. It does not measure blood sugar, does not replace your meter or your lab tests, and does not give medical advice. Always follow the advice of your doctor or diabetes care team.

Recent changes:
• Premium prices load reliably. If the store can’t be reached, the Premium screen now says so instead of loading forever
• Reminders can be edited
• A reading saved after rotating the screen keeps its tag
• Easier to read in dark mode
• Dates are shown in your language’s format
• PDF reports no longer cut values off