My event is coming up in a few days, is there enough time to make an app for it?
Definitely. You can make an event app for you in as little as 1 business day once you have all of the information available. This is a great advantage over most app makers who generally require 3-4 months to program the apps from scratch and wait for approval from the app stores.
Nonetheless, it is always best to start early to build the app to leave yourself time to promote your event, and make sure the attendees get the most out of it to its full extent.