CEX.IO allows users to sign up for an account, deposit fiat currencies, and use them to buy various cryptocurrencies. The platform offers features such as staking, spot trading, crypto-backed loans, margin trading, and institutional tools. Transaction fees are based on trading volume, and deposit fees vary depending on the payment method. CEX.IO also provides mobile applications for Android and iOS, offering price alerts, order notifications, and 24/7 support. The CEX.IO wallet allows users to securely buy, sell, and track their cryptocurrency portfolios.