This site is a small single page application on VueJS. Cryptocurrency rates are obtained from the CoinCap.io API. Balances are stored in your browser's localStorage. Your balance therefore stays private and is not sent or stored on any server.
Fiat currency conversion rates are obtained from exchangeratesapi.io.
Enter the amount you have of each cryptocurrency in each row and click save to save it to your browser storage.
Feel free to donate if you wish to contribute to cover domain costs and future improvements.