How to link to apps on the app store
I am creating a free version of my iPhone game. I want to have a button inside the free version that takes people to the paid version in the app store. If I use a standard link
http://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=300136119&mt=8
the iPhone opens Safari first, and then the app store. I have used other apps that open the app store directly, so I know it is possible.
Any ideas? What is the URL Scheme for the app store?