Here are the details from the makers of CRAM:
"We are giving Cram for Mac (usually $24.99) and Cram for iPhone (usually $3.99) FREE on August 2nd to those that download download upcoming iPhone/iPod touch game Goop (intro price of $0.99). Here are the specifics: http://simpleleapsoftware.com/
blog/back-to-school-deal-cram- for-mac-or-iphone-free/800/ "
It is a cool tool for studying.