A fitness tracking app for workout & gym enthusiasts
Built with React Frontend & Firebase Backend
Champion's Diary is a free mobile app for iOS and Android. It allows you to easily track progress for fitness workouts & body weight.
Android Download Link: https://apkpure.com/champion-s-diary/com.champs_diary
iPhone Download Link: No longer available (expired App Store subscription)
- 📅 Calendar-Based Workout Logging — View and track workouts on a day-by-day basis with an interactive calendar
- 🏋️ Customizable Workout Routines — Create, edit, and organize personalized workout routines with exercises and sets
- 📊 Weight Tracking & Charts — Monitor body weight over time with visual SVG charts
- 🔄 Offline Support — Redux Persist enables full offline functionality with automatic cloud sync
- 🔐 Secure Authentication — Firebase Authentication for secure user accounts
- ☁️ Cloud Storage — Firestore database keeps workout data synced across devices
| Category | Technologies |
|---|---|
| Framework | React Native |
| State Management | Redux, Redux Thunk, Redux Persist |
| Backend | Firebase Authentication, Cloud Firestore |
| Navigation | React Native Router Flux |
| Data Visualization | react-native-chart-kit, react-native-svg-charts |
| Date Handling | Moment.js, react-native-calendar-datepicker |
src/
├── actions/ # Redux action creators
│ ├── AuthActions.js
│ ├── WorkoutActions.js
│ ├── WeightActions.js
│ └── ...
├── reducers/ # Redux reducers
│ ├── AuthReducer.js
│ ├── WorkoutReducer.js
│ ├── WeightReducer.js
│ └── ...
├── components/
│ ├── common/ # Reusable UI components
│ ├── Lifting/ # Workout tracking screens
│ ├── WeightCharts/ # Weight tracking & visualization
│ ├── Running/ # Running tracker
│ └── ...
├── App.js # Redux store setup & persistence
└── Router.js # Navigation configuration
Key Technical Decisions:
- Redux Persist for offline-first architecture — users can log workouts without internet connectivity
- Firestore for real-time sync and scalable NoSQL document storage
- Component-based routing with React Native Router Flux for clean navigation patterns
- Modular reducer structure for maintainable state management