When traveling light with carryons I hate to have too much paper for my trips. I use the Send To Kindle app and keep a copy of plans and dates on it.
The boarding pass was sent as a back up in cases something happened.
This was done on my iPad, I keep itineraries and spread sheets here just in case.
It is a simple and secure way to handle paper which can get out of control.
All the documents appear in the library of my Kindle app. You can send man types of files to your Kindle. Can be done from desktop computer or i devices.