JugglucoNG is an experimental continuous glucose monitoring app for Android.
Originally forked from Juggluco by Jaap Korthals Altes, it continues to evolve with a modern Compose UI using Material 3, a sensor-independent data layer, support for multiple CGM systems, a treatment journal with IOB/eIOB/COB tracking, predictive simulation, a redesigned alarm engine, and bidirectional Nightscout integration.
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Warning
Experimental software — not a medical device.
JugglucoNG may contain bugs and may display incorrect, delayed, or missing data. Do not rely on it as the sole basis for treatment, insulin dosing, diagnosis, or other medical decisions. Always verify clinically significant readings using the manufacturer's official system or another appropriate method.
Android 8.0 or newer · Release notes · Wear OS · Phone DUB · Wear OS DUB
Installation and other versions
Open the downloaded APK on your phone. If Android asks, allow installation from the browser or file manager you used. Back up settings and data before updating; the matching APK updates your existing installation.
| Download | Use it for |
|---|---|
| Android phone | The standard phone app; the right choice for most people |
| Wear OS | A Wear OS watch |
| Phone DUB | A second, separate phone app with its own data |
| Wear OS DUB | The matching separate app on a Wear OS watch |
Standard and DUB installations update with their matching APK. Watch APKs are
installed on the watch. Nightlies
are test builds from recent main changes; choose the file ending in -phone.apk
for a standard phone.
Browse all releases for older versions.
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Abbott FreeStyle Libre / 2 / 2+ / 3 / 3+
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Dexcom G7 / ONE+
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CareSens Air
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Accu-Chek SmartGuide
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Sibionics GS1 (EU, Chinese, and Hematonix), Sibionics 2
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AiDex X / LinX
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iCan i3 / i6 (Sinocare)
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Anytime / Yuwell
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MQ / Glutec
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Ottai / SyAi
Follower sources: Nightscout and the HTTP API.
Multiple direct sensors can run at the same time. An opt-in handover mode starts the next sensor automatically when the current one reaches its official expiry. Bluetooth fingerstick meters can log readings straight into the journal.
Support for individual sensors is community-developed and may change or stop working as manufacturers update firmware, protocols, or online services.
Glucose display. Material 3 dashboard with trend arrow, delta, and reading history; statistics (time in range, GMI, AGP percentile views, exportable reports) with persistent time ranges; charts in the notification shade; always-on display; floating overlay; home-screen widgets; automatic dark mode.
Alarms. Custom alarm engine: low/high with time ranges and episodes, rate-of-change alarms (falling/rising fast), sensor-expiry warnings at configurable thresholds, signal-loss and forecast alerts, follower alerts. Alarms can be spoken (TTS), delayed, or vibrate-first, and a failed delivery does not silently consume the alarm.
Journal and insulin. Food database with meal curves, dose calculator, insulin-on-board (IOB/eIOB) and carbs-on-board (COB) tracking, treatment intake from AAPS, treatment sync with Nightscout, quick-add entries.
Prediction. On-device predictive simulation of glucose, insulin, and meals, with configurable model profiles.
Nightscout. Upload readings and treatments, follow a remote site, and exchange IOB/eIOB/COB through devicestatus in both roles (opt-in). Long-acting insulin entries are supported.
Data. Sensor-independent local database with export/import, direct import of Juggluco's TSV export, settings export, and non-destructive calibration exports. Per-sensor calibration models with chart and table views.
Sharing and integrations. Clone the app to another phone over LAN or the internet (ICE/TURN, no account needed); glucodata-style broadcasts for other apps and watchfaces; Health Connect; Pebble; an outbound API that pushes readings to chatbots, emergency SMS, or any webhook.
Requirements: JDK 21, Android SDK with NDK and CMake, and the libjuice submodule:
git submodule update --init
./gradlew :Common:assembleMobileDebug --no-daemon
--
./gradlew :Common:assembleMobileRelease --no-daemonThe app is localized into 15 languages; new user-facing strings go into Common/src/main/res/values/strings.xml and every values-* locale.
Build helpers live in scripts/, developer tools in tools/, and documentation images in docs/assets/. Historical root files are preserved in tools/archive/root-cleanup/.
See the Releases page for the changelog of each Alpha build.
GPL-3.0 (see LICENSE.txt). Forked from Juggluco by Jaap Korthals Altes. Developed by ctqvva with contributions from the community.
Disclaimer: This software is provided "as is", without warranty of any kind, to the fullest extent permitted by applicable law. JugglucoNG is experimental software and is not a medical device. The authors and contributors make no guarantees regarding its accuracy, reliability, availability, or fitness for any particular purpose. Always verify clinically significant readings using the manufacturer's official system or another appropriate method before making treatment decisions.