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 Rijul Gupta:
A comprehensive Physics App is finally here! This app will help you ace the AP Mechanic Physics C test in May, or just study for a college level Physics class. Although geared toward the AP test, it covers anything one needs to know about Mechanical Physics. This app includes a full AP Physics practice test with 35 multiple choice questions and 3 free response questions, with answers so you can grade them. The test is correctly timed and allows you to mark and review the questions. The app grades your multiple choice questions automatically and uses your inputed free response score to give you a percent grade as well as a 1-5 AP grade. At the end of the test, the app allows you not only to see the questions you missed, but the right answers as well as an explanation. Also included is a full study guide to Mechanical Physics that covers every topic:
-Simple Harmonic Motion
-Free Response Questions If you want to learn mechanical physics, this app is for you!