Targetz - Productivity Todo App

A modern, Android-first todo app with smart app-triggered reminders built with React Native and Expo.

Features

• ✅ Smart Todo Management: CRUD operations with priority ranking and drag-and-drop reordering
• ⏰ Time-Based Reminders: Scheduled notifications at custom intervals
• 📱 App-Triggered Reminders (Android): Get reminded when opening specific apps
• 🎨 Theme System: Beautiful dark/light mode with smooth transitions
• 💰 Free/Paid Modes: Free tier with 2 app limit, paid with unlimited

Tech Stack

• Framework: React Native 0.74+ with Expo SDK 51+
• Build System: Expo Development Builds
• Storage: react-native-mmkv (20-30x faster than AsyncStorage)
• State Management: Zustand
• Notifications: expo-notifications
• Animations: Moti (built on Reanimated 2)
• Drag & Drop: react-native-draglist
• App Detection: Custom native module using UsageStatsManager

Prerequisites

• Node.js 18.18+ LTS
• npm or Yarn
• Android Studio (for Android emulator/SDK)
• Expo CLI: npm install -g @expo/cli
• EAS CLI: npm install -g eas-cli (optional, for cloud builds)

Setup

1. Install dependencies:

   npm install

2. Generate native directories (required for development builds):

   npx expo prebuild

3. Start the development server:

   npm start

4. Run on Android:

   npm run android

Development

Project Structure

targetz/
├── app/                    # Expo Router screens
│   ├── _layout.jsx        # Root layout
│   ├── index.jsx         # Home screen
│   └── settings.jsx      # Settings screen
├── src/
│   ├── components/        # Reusable UI components
│   ├── stores/           # Zustand state stores
│   ├── theme/            # Theme system
│   └── utils/            # Utility functions
├── app-detector/         # Native module for app detection
│   ├── app.plugin.js     # Expo config plugin
│   └── android/          # Android native code
└── assets/               # Images, fonts, etc.

Key Components

• TodoStore: Manages todos with MMKV persistence
• SettingsStore: Handles app settings and preferences
• AppDetectorModule: Native Kotlin module for app detection
• NotificationUtils: Handles notification scheduling

Building for Production

Android (Local)

npx expo run:android --variant release

Android (Cloud - EAS Build)

eas build --platform android

Permissions

Android

• PACKAGE_USAGE_STATS: Required for app detection feature

  • User must grant this manually in Android Settings
  • The app will guide users to the settings page

• Notifications: Required for reminders

  • Requested automatically on first use

Performance Targets

• Cold start: <2s
• List scrolling: 60fps
• Storage read/write: <1ms (MMKV)
• Battery drain: <2% per day with app detection

License

Private - All rights reserved