From Electronic Funds Source LLC:
EFS Mobile Driver Source is the source that allows our customers drivers convenient access to their EFS card management functions while on the go. This app allows drivers to manage their cards anytime and anywhere from their mobile device. From getting real time card balances, to checking the card load history, to managing their EFS SmartFunds, this convenient, secure mobile app provides unprecedented EFS card access and control.Innovative truck stop fuel location finder! While the app is free for the public to download, users must be a current EFS customer with a valid and active EFS card number and password in order to use this app.