Trust Wallet is one of the most popular mobile crypto wallet.
Trust Wallet lets their user enter a FIO Handle instead of public address when sending tokens.
Token Send Screen
No additional UI elements are required, the wallet simply recognizes the unique format of FIO Handles (username@domain) and looks-up the public address usinsg a simple REST API call
Token Send Confirmation Screen
Both FIO Handle and public address are displayed on Send Confirmation screen