This document describes a mobile app system that allows exhibitors at an expo or trade show to upload information like catalogs and presentations, display QR codes to be scanned by visitors, and then receive reports with visitor lead data. It also allows visitors to scan exhibitor tags to get exhibitor information and exhibitors to scan visitor tags to get visitor lead reports. The system further enables exhibitors to set VIP invitations targeted to visitors by business criteria and budget, and send personalized news updates to followers based on which exhibitors they scanned at the show.