Mobile apps have evolved significantly since their early days. Early mobile event apps were simply "show guides" that allowed for passive viewing of information with long development cycles. However, with the rise of smartphones and app stores, mobile apps became more engaging through features like user generated content, video, and improved usability. Today, most meetings and events now use mobile apps to provide an interactive experience for attendees, extend the life of the event, and increase sponsorship revenue. Event organizers must choose apps carefully based on objectives and audience to maximize uptake, which averages around 30% of attendees. The future of mobile apps includes technologies like Internet Protocol Services, near field communication, and gamification.