Calm and reliable glucose alarms for parents following a Dexcom G7 wearer, with a one-tap resugaring snooze.
Not a medical device. Keep the official Dexcom Follow app installed as a backup. See the disclaimer.
At night, after a low, you give sugar to your child. Then the follow app keeps ringing every few minutes until the glucose climbs back, and the whole family is awake. SmartFollow fixes that:
- Resugaring snooze: one tap silences the low alarms while the carbs work (25 minutes by default).
- Safety first: the urgent low, a fast drop and "not rising after resugaring" still ring during the snooze.
- Two parents, one state: a resugaring or an OK on one phone silences the other. The iPhone gets the alarms through ntfy and a web page, with no App Store app.
- Alarms: urgent low, low, low soon (trend prediction), fast drop, no recovery, no data, high, urgent high. Each one rings, is muted or is off, once or until OK, with its own sound.
- Profiles: Home, School, Discreet (only the lows ring), switched from the top bar or a quick settings tile.
- Night: alarms ring lower at night, and a summary of the night arrives in the morning.
- Follow-up: chart, history (one line per episode), statistics (time in range, GMI, variability) and CSV export.
- Languages: English and French, following the phone or chosen in the settings.
- Private: no analytics; the data stays on your phone and, if you want one, on your own server.
| Monitoring | A low | Settings | An alarm | Sounds |
|---|---|---|---|---|
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Dexcom G7 ──► Dexcom Share ──► SmartFollow app (Android, works on its own)
│ ▲
└──► SmartFollow server (optional) ──ntfy──► iPhone (ntfy + web page)
The Android app reads the glucose from Dexcom Share, the service behind Dexcom Follow, and raises the alarms itself. The optional server does the same for the iPhone and shares the parents' actions between the phones.
- Build the app: SmartFollow is distributed as source code only. With JDK 17+ and the
Android SDK, run
./gradlew :app:assembleDebug, then installapp/build/outputs/apk/debug/app-debug.apkfrom Android Studio or withadb install. - Try it: debug builds accept the
demoaccount (any password), which shows synthetic readings. - Sign in with the Dexcom account of the sensor wearer, not a Follow account. Sharing must be enabled in the Dexcom G7 app, with at least one follower.
- Optional: deploy the server for the second parent's iPhone, see deploy/DEPLOY.md.
Requires Android 10 or later.
- Technical documentation: modules, alarm rules, app and server.
- Server deployment, changelog.
- Contributing, code of conduct, security policy.
The Dexcom credentials, readings, settings and history stay on the phone. The app only talks to the Dexcom Share servers of the selected region and, if one is set, to your own SmartFollow server; it has no analytics. The password and the server token are encrypted with an Android Keystore key, and Android backup is disabled. See deploy/DEPLOY.md for the server's privacy notes.
- This software is not a medical device. It is not cleared or approved by any health authority and must not be used to make treatment decisions. Alarms can be late or missing (network, Dexcom Share outage, phone settings, bugs). Always keep the official Dexcom apps and their alerts as the reference.
- This project is not affiliated with, endorsed by or supported by Dexcom, Inc. or Insulet Corporation. Dexcom, Dexcom G7, Dexcom Share and Dexcom Follow are trademarks of Dexcom, Inc.; Omnipod is a trademark of Insulet Corporation. They are used only to describe compatibility.
- It relies on the unofficial, undocumented Dexcom Share API, which can change or stop working at any time. Using it may be subject to Dexcom's terms of use; only use it with an account you are entitled to use.
- The software is provided "as is", without warranty of any kind; see LICENSE.
MIT. The Dexcom Share protocol implementation is based on the behaviour documented by pydexcom (MIT); no code was copied from it. Third-party material is listed in NOTICE.