Build a Currency Converter App
Create a real-time currency converter mobile app that helps users calculate exchange rates between international currencies. A useful and practical app development project in the finance space.Currency converters are essential tools for travelers, freelancers, and international shoppers. This app development project introduces you to REST API integration, real-time data fetching, and financial calculation logic—perfect for building useful, everyday tools.
Users select two currencies and enter an amount to convert. The app fetches live exchange rates, performs conversions, and displays results instantly. It may include a favorites list, recent conversions, and an offline fallback rate.
Live Currency Conversion
Connect to a real-time exchange rate API to convert values between global currencies instantly.
Multiple Currency Support
Support 100+ international currencies, including crypto tokens and regional variations.
Favorites and Recents
Allow users to save frequently used currency pairs and view recent conversion history.
Offline Mode (Optional)
Cache the latest rates locally to enable basic conversion when no internet is available.
Users select 'from' and 'to' currencies, enter the amount, and get an instant result based on real-time rates. The app displays conversion details, rate breakdown, and a timestamp. Users can also switch direction, save pairs, or refresh the rates manually.
- Select source and target currencies from the dropdown menu.
- Enter the amount to be converted and press the convert button.
- The app fetches the latest exchange rate via API and shows the result instantly.
- Saved pairs or frequently used conversions appear on a dedicated tab or dashboard.
- The app caches recent rates for basic use in offline mode (if implemented).
Frontend
React Native or Flutter for building cross-platform UI with input fields, dropdowns, and tab views.
API for Rates
Use ExchangeRate-API, Open Exchange Rates, or CurrencyFreaks for fetching real-time exchange data.
Storage
AsyncStorage or SQLite to store favorite pairs and offline fallback rates.
Other Tools
Axios or Fetch for API calls, moment.js or dayjs for timestamps, and Lottie for animated UI feedback.
1. Design the Currency Selection UI
Create dropdowns for 'from' and 'to' currencies and add a currency search field.
2. Integrate Exchange Rate API
Use a currency exchange API to fetch conversion data based on the selected currencies.
3. Display Results with Formatting
Show the converted value, exchange rate, and last updated timestamp with clean styling.
4. Add Recents and Favorites System
Store user conversions and allow marking of currency pairs as favorites for quicker access.
5. Implement Offline Cache (Optional)
Cache the latest conversion rates and enable basic conversions without network access.
Convert Currencies in Real Time
Develop a real-time, accurate, and easy-to-use currency converter app—ideal for travel, finance, and global business users. A smart and focused app development project.
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