Guruko: Libre Glucose Logbook

Guruko: Libre Glucose Logbook

Blood sugar diary for diabetes

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Features

Guruko: Libre Glucose Logbook screenshot #1 for iPhone
Guruko: Libre Glucose Logbook screenshot #2 for iPhone
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Guruko: Libre Glucose Logbook screenshot #4 for iPhone
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Guruko: Libre Glucose Logbook screenshot #8 for iPhone
Guruko: Libre Glucose Logbook screenshot #9 for iPhone
Guruko: Libre Glucose Logbook screenshot #10 for iPhone
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About

Guruko is a glucose viewer that fetches your Abbott FreeStyle Libre readings as a LibreLinkUp follower and stores them on your device as a long-term history - for looking back on your diabetes management and CGM trends. WHY STORE? The official LibreLink app shows only about the last 8 hours, and LibreLinkUp about 12. Guruko fetches periodically and accumulates, so you get weeks and months of history, statistics and AGP. That is what Guruko is for. FEATURES - Continuous graph with the latest reading; tap or drag for details at any point - Time search: jump to any date or keyword in your history; recalculate stats and AGP for any period - Statistics: Time in Range (TIR), average, GMI (estimated HbA1c), CV, SD, daily heatmap - AGP: percentile bands folded across days to see your daily patterns - Insights: weekly highlights and rule-based pattern detection - Logs: carbs, insulin and notes overlaid on the graph - a digital blood sugar diary - NovoPen import via NFC (unofficial) - iCloud sync across your devices - Apple Health export (write-only) - CSV export WIDGETS, LOCK SCREEN & APPLE WATCH - Home and Lock Screen widgets with the latest value and a mini graph - Live Activity / Dynamic Island on the Lock Screen - Apple Watch app and complications Note: automatic updates are limited by the OS to save battery (no push notifications are used). Open the app to refresh. PRIVACY Your glucose data stays on your device (and your iCloud). Guruko has no backend and sends nothing to its own servers. GURUKO PRO (subscription) Core features (history, graphs, statistics, AGP, insights, CSV) are free. Pro unlocks: - Apple Watch app and complications - Apple Health export - Lock Screen display (Live Activity / Dynamic Island) - Reports (PDF / CSV) Price: JPY 200/month or JPY 1,500/year. Payment is charged to your Apple ID account. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Manage or cancel in Settings > Apple ID > Subscriptions. Terms of Use: https://guruko.remosia.biz/terms Privacy Policy: https://guruko.remosia.biz/privacy DISCLAIMER Guruko is a viewing and logging aid, not a medical device. Displayed values are based on LibreLinkUp shared data. NovoPen import is unofficial. Always rely on official apps, devices and your healthcare professionals for diagnosis, treatment and medication decisions. This app is intended for use in Japan. The FreeStyle Libre system is approved as a medical device in Japan (approval no. 22800BZX00212000 and others). Abbott, FreeStyle, FreeStyle Libre, LibreLink, LibreLinkUp, Novo Nordisk and NovoPen are trademarks of their respective owners. Guruko is an unofficial app and is not affiliated with them.
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What's New in Guruko

1.1

July 18, 2026

This update adds time search - find and revisit any moment in your stored glucose history. JUMP TO A DATE OR KEYWORD (Trend) - Pick a date on the calendar from the magnifier button and the chart jumps to that day - Search your log notes by keyword (e.g. "ramen"); hits are highlighted in yellow on the chart, and you can step through them newest-first - While jumping, a date bar appears: re-center on the target, or tap x to return to live - Jumps far into the past are now fast and light (only the needed range is loaded) ANY PERIOD FOR STATS AND PATTERNS - Pick a start and end date from the calendar button; statistics, AGP, daily TIR and the GMI trend are recalculated for that period - Great for "that one week of travel" or before/after a medication change FROM INSIGHTS TO THE CHART - Tap the best/worst day under Insights and the Trend tab jumps to that day's curve OTHER IMPROVEMENTS AND FIXES - Your Guruko Pro renewal (or expiry) date is now shown in Settings - Widgets and Apple Watch now explain when Pro is required instead of showing a silent "-" - Fixed dates and statistics charts not rendering correctly when the device calendar is set to Japanese (wareki) - Fixed the Apple Watch standby message being truncated to "..." - Fixed graphs on Apple Watch, widgets and the Lock Screen display missing up to 15 minutes at the left edge - Fixed part of the chart briefly missing right after returning from a time-search jump to the live view - General stability and reliability improvements

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