Glucose Diary - Daily Tracker

Auto-classify readings by meal context. Trend chart with target-range guides. Estimated A1C after 14+ days. 100% on-device — no account, no cloud.

One reading at a time — Glucose Diary is the simplest, most accurate way to track blood glucose for diabetes management and prevention.

▶ Record readings with their meal context Fasting · Pre-meal · 2h post-meal · Bedtime · Random — thresholds for "normal" differ by context, so each entry is auto-classified by when it was taken.

▶ Trend at a glance A smooth line chart visualizes your glucose over time, with target-range guides (70-180 mg/dL) that make trends easy to read.

▶ Estimated A1C (after 14+ days) Based on the ADA average-glucose-to-A1C conversion. A useful self-monitoring proxy between lab visits.

▶ Choose your classification standard Korean Diabetes Association (KDA) or American Diabetes Association (ADA) — match whichever your doctor uses. Your raw data is unchanged when you switch standards; only the labels are recomputed.

▶ Categories (auto-applied per meal context) • Severe low (under 54 mg/dL) • Low (54-69) • Normal — context-specific threshold • Pre-diabetic (IFG / IGT) • Diabetic • Severe high (300 or higher)

▶ Activity, feeling, and medication tags After exercise · After alcohol · Traveling · Tired · Stressed · Sick · After insulin — common contexts are one tap; create your own tags as needed.

▶ Calendar view Month calendar with category-colored dots — see at a glance which days you logged and how each reading fell.

▶ Reminders Up to 3 daily measurement reminders at the times and weekdays you choose. Scheduled locally on the device — no internet required.

▶ Export and backup CSV export to share with your doctor; full JSON backup and restore for moving between phones.

▶ 100% on-device — no internet, no account Every reading is stored in a local SQLite database. Nothing leaves the device. No sign-up required. Your health data stays yours.

▶ Korean and English Auto-detects from system locale, or pick manually in Settings. Dark mode supported.

Note — This app is a self-monitoring diary, not a medical device. The displayed categories and estimated values are reference indicators only and do not replace medical judgment. Discuss any diagnostic or treatment decisions with your physician.

Classification sources: • Korean Diabetes Association (KDA, 2023): https://www.diabetes.or.kr • American Diabetes Association — Standards of Care in Diabetes (2026)