I need a lightweight tool that lets me enter an amount in one cryptocurrency, choose another, and instantly see the live-rate conversion. Accuracy and speed come first; design can stay minimal. Feel free to pick the language, framework, and price-feed API you trust, provided the finished solution runs on a standard desktop environment with no complicated setup. Deliverables • A runnable script, CLI program, or small web page that performs real-time conversions. • Clear setup instructions and a short README explaining the chosen API and any rate-limit considerations. • Conversions must refresh on demand, handle at least three widely traded coins, and display a timestamp so I know when the quote was fetched. Once those points are met, I’ll test it against a public price tracker and sign off.