Cash app is a peer to peer payment app that was launched in 2013 by Square Inc, it allows users to send and receive money online. In the Cash app instead of an account number, you are known on the network by your email address or phone number. You can also create a unique identifier known as a $Cashtag. Users can link Cash App to an existing bank account and use that to transfer money to and from the Cash App account. With Cash App, you can send money from a debit card and spend your Cash App balance directly from that. Users can also receive direct deposits (like a paycheck), to their accounts.