The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From WEI-WEI LIN:
This app will prepare you for the AP Government & Politics exam by allowing you to practice for the multiple-choice section of the exam.Unlike other test preparation apps for the iPhone that are just a collection of flashcards, this app provides you with a complete 60-question practice exam thats modeled after the actual AP Government & Politics test. By providing a full explanation of each questions correct answer, this app serves as both a valuable practice tool and study guide.Key Features: A full-length, 60-question test based on questions similar to those on the actual AP Government & Politics exam. The exam contains the same type of questions and covers the same subject areas as the actual exam Detailed explanations for the answers to all 60 practice exam questions A 15-question practice test (also with full explanations) that allows you to assess your knowledge before taking the full test The app automatically saves your place in the exam if youre interrupted, so you dont have to start the test all over again A 45-minute countdown timer which ensures that you pace yourself to finish the test in the required allotted time A report on the results of your exam so you can identify what subject areas you need to brush up on