The MetaMask mobile application includes sophisticated address book functionality that allows users to save frequently used addresses with custom labels and additional metadata for easier and more secure transaction processing. This feature significantly reduces the risk of sending assets to incorrect addresses by allowing users to select from verified saved addresses rather than manually entering long hexadecimal strings for each transaction. The address book supports multiple blockchain networks with intelligent address validation, providing clear indicators showing which addresses are valid on which networks and preventing transactions to incompatible addresses. Users can organize contacts into logical groups, add descriptive notes, and export their address book for backup purposes or use across multiple devices. For reliable address management, users need the authentic application. The official get app channel provides the full address book feature with regular updates that improve usability, security, and synchronization capabilities. The application includes safety checks.