Cash App (previously known as Square Cash) is a mobile payment service developed by Square, Inc., allowing users to transfer money to one another via a mobile phone app. One of its distinguishing advantages is that it enables customers to convert cash (USD, EUR, GBP, etc.) to bitcoins. There is a database and transfer structure, much like any other transfers system, where all registered users, account balances, and transaction history are recorded. In addition, an exact transaction log is established for each transaction, which registers the cash app transaction and communicates with the servers on the appropriate steps.