I recommend "View Ranger". App is free, and basic maps are also free. You can buy more detailed maps if you like. You can also search their user database for hikes/routes. You will find both the Main Trail and Mountaineer's Route. You can download maps to your phone and use without cell/WiFi coverage. The also have a "MyViewRanger" site (free to join) where you can manage your routes and tracks. Upload gpx files to their site, edit the gpx files, etc.....
Main site: http://www.viewranger.com/en-us
After you register for "myviewranger" you can download routes, etc.....
Highly recommended.

I use it with iPhone, but they also support android. Not sure how it works with android, but guess is works the same.

Last edited by John Sims; 05/04/14 05:02 PM. Reason: iphone comment