Apple iPhone OS 3.1 - Manual (Page 169)

Info Screen
Tap any application in a list to see more information, such as the application’s price,
screenshots, ratings, and other information.
If you’ve already installed the application, “Installed” appears instead of the price on
the Info screen.
Email a link to the application’s Info page in iTunes: Tap “Tell a Friend” near the
bottom of the Info screen.
View screenshots: Swipe left or right over a screenshot to view additional screenshot
pages. Double-tap to zoom in.
Get ratings and read reviews: Tap Ratings near the bottom of the Info screen.
Report a problem: Tap “Report a Problem” near the bottom of the Info screen. Select a
problem from the list or type optional comments, then tap Report.
169 Chapter 21 App Store