This is for the desktop/tablet browser planner only, nothing to do with the iOS or Android Esri Events app. Hopefully it is useful to you.
Put these links on your Notes on your smart device and then when you click on them they can show up quickly:
UC2015 Agenda page = http://www.esri.com/events/user-conference/agenda
Online Agenda Planner = https://esrievents.gatherdigital.com/apps/1949/gatherings/2046
To choose the sessions and save them, login to the Online Agenda Planner (Planner), click on the Menu button (top left) and go to Agenda. Search for a topic (like 'arcgis pro') or go through each day. Click on a session to see the details. Then click on the Star on top to save. This will save it to My Schedule.
Go to My Schedule under the left menu in the Planner and click on each day. Hit Ctrl-P in Google Chrome and you can Preview of the page showing your sessions for the day in a simple list format. Print that out and it's more useful than any mobile device.
If you are ambitious, save each day's schedule view as a web page (Ctrl-S in the browser). Open that up and you can copy and paste THE ACTUAL TEXT into the file/format of your choice.