How to Use Your Computer to Find iPhone Apps
Check out the detail screen from your computer.
To find out more about an app icon, a featured app, or a text link on any of the iTunes App Store screens, just click it. A detail screen like the one shown appears.
This screen should tell you most of what you need to know about the app, such as basic product information and a narrative description, what's new in this version, the language it's presented in, and the system requirements to run the app. Click the blue More link to the right of the Description and What’s New sections to expand them and see additional details.