I want a no-frills cryptocurrency converter that lets a user type an amount, pick a “from” coin, pick a “to” coin, and immediately see the converted value. Accuracy and a clean, intuitive interface matter more to me than fancy graphics. Core expectations • A small but solid list of coins to start (Bitcoin, Ethereum and Litecoin are the obvious first picks—feel free to suggest others if the same codebase makes it easy). • Live price data pulled from a reliable public API so rates stay current; caching or manual-refresh options are fine as long as the numbers stay trustworthy. • Clear separation of concerns in the code so I can drop the converter into a web page today and later adapt it for a mobile or desktop shell without rewriting the logic. Deliverable A working converter with readable, well-commented source, a brief README explaining how to swap in new coins or point to a different pricing API, and any build/hosting instructions needed to get it online quickly. If you already have a lightweight framework or favorite library for talking to exchanges—axios, fetch, WebSocket, you name it—bring it on. I’m aiming for simplicity, correctness and portability.