Calorie Tracker

Simple Expo Android app for logging calories, visualizing weekly trends, and adjusting the daily target from body weight.

Features

• 🤖 On-device meal estimation with local AI model inference
• 🍽️ Meals, weights, and body-fat logs stored locally in SQLite
• ⚙️ Settings and lightweight preferences stored on-device with MMKV
• 🎯 Daily calorie target from either a fallback goal or latest weight x calories-per-kg multiplier
• 💪 Health Connect weight sync on Android
• 📊 Weekly calorie bar chart
• 📈 Weight trend line chart

On-device models (LiteRT-LM)

• 📦 AI models are downloaded to the device and run locally using LiteRT-LM: https://github.com/google-ai-edge/LiteRT-LM
• 🔒 No cloud inference is done for model execution after download
• 🛠️ The Settings screen includes controls to download models and run local inference

Showcase

Video demo

estimate_meal.mp4

Screenshots

Installation

Download the latest APK from the Releases page and sideload it on your Android device. Requires Android 8+ (API 26).

Development

Android

Note: This app uses react-native-health-connect and requires a development build. It does not run inside Expo Go.

1. Install dependencies:

npm install

2. Generate the native Android project:

npm run prebuild

3. Build and launch the Android app:

npm run android

4. Start Metro for the development build:

npm run start

Health Connect notes

• The app requests read access for weight records.
• minSdkVersion is set to 26 because Health Connect requires Android 8+

Acknowledgement

• LiteRT-LM: https://github.com/google-ai-edge/LiteRT-LM
• react-native-litert-lm: https://github.com/hung-yueh/react-native-litert-lm

License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.