CurexApp

A cross-platform mobile currency exchange application built with Expo and React Native that provides real-time currency conversion, rate tracking, and offline functionality for travelers and international users.

🚀 Quick Start

Installation & Run

npm install
npm start

📱 Features

• 170+ World Currencies - Comprehensive currency support including cryptocurrencies
• Real-time Exchange Rates - Live rates from Frankfurter.dev (no limits!)
• Intelligent Caching - 30-minute cache for optimal performance
• Always Available - Free API with no rate limits or authentication
• Offline-Friendly - Works with cached data when offline
• Favorites Management - Save frequently used currencies
• Clean Interface - Intuitive design with section organization

📝 Tech Stack

• React Native with Expo
• TypeScript
• Redux Toolkit with RTK Query
• Frankfurter.dev API (free, no limits)
• AsyncStorage for caching

🔧 API Configuration

The app uses ExchangeRate-API with the following limits:

• Monthly Quota: 1,500 requests (resets 9th of each month)
• Daily Limit: 48 requests/day (automatically managed)
• Cache Duration: 4 hours (configurable via environment)

Environment Variables

EXPO_PUBLIC_EXCHANGE_RATE_API_KEY=your_api_key_here
EXPO_PUBLIC_DAILY_REQUEST_LIMIT=48
EXPO_PUBLIC_CACHE_DURATION_HOURS=4

⚠️ Important: Never commit your .env file to version control. The API key should be kept private.

• Expo Router for navigation
• Redux Toolkit for state management
• React Native Paper for UI components