Did you know that the NGS 2013 Conference App is available for use on your laptop computer? As long as you have an Internet connection, you can use the app on any computer with a browser. Check it out at http://m.core-apps.com/ngs2013.
Your printed conference schedule contains black and white maps. I think the color maps in the conference app on a laptop are far more legible.
For native smart phone apps, check out http://www.ngsgenealogy.org/cs/maximize_your_experience.