Coinbase is an app that lets you buy and sell all sorts of cryptocurrencies, like bitcoin, ethereum, litecoin and about 50 others. You can also use Coinbase Login to convert one cryptocurrency to another, or to send and receive cryptocurrency to and from other people. Like stock trading apps you may already be familiar with, Coinbase shows you the current price and trends for cryptocurrencies, a look at your portfolio of holdings, and news stories about the industry. Coinbase is an app that lets you buy and sell all sorts of cryptocurrencies, like bitcoin, ethereum, litecoin and about 50 others. You can also use Coinbase to convert one cryptocurrency to another, or to send and receive cryptocurrency to and from other people. Like stock trading apps you may already be familiar with, Coinbase shows you the current price and trends for cryptocurrencies, a look at your portfolio of holdings and news stories about the industry.