KaratExchange

💰 KARATEXCHANGE – Your Smart Companion for Currencies, Gold & Silver

Stay on top of global exchange rates and gold & silver prices – anytime, anywhere, completely ad-free. KaratExchange combines precise exchange rates from the European Central Bank with live precious metal prices in one elegant, multilingual app.


✨ KEY FEATURES

📊 CURRENCY CONVERTER
• 40+ international currencies (EUR, USD, TRY, GBP, CHF, JPY and many more)
• Official ECB reference rates, updated daily
• Country flags and full currency names for a clear overview
• Favourites system: Star your most important currencies
• Convert any amount with real-time calculation
• Copy to clipboard: Copy converted amounts with a single tap
• Trend indicator: See at a glance whether rates are rising or falling
• Offline mode: Last loaded rates remain available without internet

🪙 GOLD & SILVER PRICE CALCULATOR
• Live prices for gold and silver in USD, EUR, TRY, GBP, CHF, JPY and more
• Gold (1g, 1kg, 1 oz) as well as Turkish gold coins
• Silver (1g, 1kg) – ideal for precious metal comparisons
• Smart shopping cart: Collect and calculate your purchases
• Persistent cart: Your selection is saved even after restarting the app
• Undo function: Restore accidentally deleted items
• Adjustable dealer margin: 1–5 % for realistic purchase prices
• Integrated Zakat calculator (2.5 % of total value)
• Share function: Share your cart results directly

🌍 MULTILINGUAL
• Fully available in German, English, Turkish, French and Spanish
• Switch language at any time in settings

🌙 MODERN INTERFACE
• Dark Mode & Light Mode (automatic based on system setting or manual)
• Material Design 3 for intuitive navigation
• Pull-to-refresh for manual updates
• Adjustable haptic feedback (off / light / full)
• Responsive design for all screen sizes

🔒 PRIVACY & SECURITY
• 100% GDPR compliant: All data stays locally on your device
• No cloud, no account, no personal data collected
• Encrypted HTTPS connections to our servers
• No adverts, no trackers

📡 DATA SOURCES
• Currencies: European Central Bank (ECB) via Frankfurter API
• Gold & Silver: GoldAPI.io with intelligent 24h cache
• Updates: Weekdays between 15:00–16:00 CET (ECB publication)


🎯 PERFECT FOR

• Travellers: Quickly convert prices on holiday
• Forex enthusiasts: Keep track of rate movements
• Gold & Silver investors: Compare and calculate prices
• Muslims: Easily calculate Zakat on precious metals
• Expats & international families: Favourite your home and target currencies
• Business professionals: Professional currency conversion
• Savers: Calculate precious metals as an investment


🚀 PLANNED FEATURES

• Gold price chart with historical price development
• Export function for cart calculations
• Platinum & Palladium
• Push notifications for significant rate changes
• Home screen widget


💡 WHY KARATEXCHANGE?

While other apps are overloaded with adverts or require expensive subscriptions, KaratExchange offers a clean, focused solution. We concentrate on what matters: precise data, fast performance and complete privacy.

The app was built by developers who themselves juggle multiple currencies and track gold prices daily. Every feature was developed from a real need – and is offered completely free of charge.


📞 SUPPORT & FEEDBACK

Questions, requests or feedback? We'd love to hear from you!
E-mail: dartlogic.dev@gmail.com
GitHub: github.com/dartlogicdev/currency-gold-application

Download for free and keep your finances under control! 💰