As part of version 3.8.4, I added the ability to print PDF reports straight from your iOS device to an AirPrint-enabled printer. Once a PDF file has been generated, simply tap the button at the top right of the screen and select Print.
See http://support.apple.com/kb/ht4356 for more details on AirPrint. Also its worth mentioning that it is possible to get this working with a non-AirPrint printer. I managed that using some 3rd party Mac software called handyPrint.
Let me know how you get on!