FYI ....Seen This on the Tiffin forum earlier today, good thru tommorrow 4/30/2012. Looked at a few, lots of good info, It seemed like more info on the individual app
Chimani is giving away 1 million free copies of their National Parks Apps. They have them for iPhone and Android till 30 Apr as part of a National Parks week promotion. Check it out
http://www.chimani.com/