GymBook 💪

A personal workout tracking app built with React Native and Expo.

Features

• Session Tracking — Add exercises, track sets, and lock your session when done
• Exercise Library — Save your go-to exercises with default sets and reps
• Templates — Create workout templates like "Push Day" to load quickly into sessions
• Heatmap — GitHub-style quarterly consistency heatmap starting from Jan 1, 2026
• Streak Counter — Tracks consecutive days with locked sessions
• Light / Dark Theme — Toggle between themes, preference saved automatically

Tech Stack

• React Native + Expo SDK 54 (TypeScript)
• expo-router for navigation
• AsyncStorage for local data persistence
• EAS Build for APK generation

Getting Started

1. Install dependencies

   npm install --legacy-peer-deps

2. Start the app

   npx expo start

3. Scan the QR code with Expo Go on Android to preview

Build APK

eas build -p android --profile preview

Download the APK from expo.dev after the build completes.

Project Structure

gymbook/
├── app/
│   ├── _layout.tsx          # Root layout with ThemeProvider
│   └── (tabs)/
│       ├── _layout.tsx      # Tab navigator
│       ├── index.tsx        # Home screen (heatmap + today)
│       ├── session.tsx      # Session tracking
│       ├── templates.tsx    # Workout templates
│       └── library.tsx      # Exercise library
├── constants/
│   ├── theme.ts             # Light and dark color themes
│   └── ThemeContext.tsx     # Global theme state
└── store/
    └── storage.ts           # AsyncStorage data layer