TicketSource Express is a free Android app developed by TicketSource. It is an on-the-door barcode scanning and validation app designed to work with e-tickets, mobile tickets, and thermal tickets. The app is a companion to the TicketSource website, which is the UK's most comprehensive solution for all of your online ticket sales needs.

With TicketSource Express, event organizers can easily manage registration and sell tickets for their events. The app provides an easy-to-use, self-service website for event organizers to sell tickets to events, regardless of the size of the event.

TicketSource Express requires a camera with autofocus to correctly decode the barcodes on customer's tickets. The app is essential for on-the-door validation and scanning of tickets, making it an indispensable tool for event organizers using TicketSource.