An e-wallet allows users to store payment information like credit cards and make purchases online without reentering their details. Most e-wallets are software programs that run on computers, but they will soon be integrated into mobile devices. While e-wallets make online shopping more convenient, some have compatibility issues or security concerns if a user's device crashes or is hacked. Newer e-wallets aim to address these problems with features like password protection and compatibility with different browsers and security standards.