My iPad was notified to download the update for the iOS version yesterday (4/29/15) (I still had last year's app installed). Search for "Esri Events" on the app store since it is there. I don't have an android so can't answer for that app.
The UC agenda is not available for it yet, but you can explore with the next upcoming conference that is on with the app. Looks to be much better user interface than last year. So, I'm looking forward to using it.