I hated the last event app I used.
Every time I opened it, I had to sign in all over again. It didn't save my login information, so I had to manually type in my email address and password multiple times a day.
Then, to make matters worse, the app didn't have all the information I needed. It didn't include the event emails detailing lunch options (I had to dig through my inbox), nor did it have session surveys or a map of the conference center.
Have you ever used an app like that?