While event apps are ubiquitous at events, they are typically only used as a paper program replacement, or a scheduling aid. But they can be a lot more.
If you have the time and the budget, you can take your event app beyond their foundational uses. Most event apps have capabilities such as polling, scheduling, networking, and communication tools.
More information: http://www.eventmanagerblog.com/methods-re-purposing-event-app