What's the link to the ratings page on iTunes for my app?
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"???"]];
What's the link to the ratings page on iTunes for my app?
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"???"]];
This other question has an appropriate answer. Note that the type=Purple+Software part is literal and not the name of your company. The only thing you need to change is the app id. This example is a little strange in that the string is broken up into several strings, I would just use one for the format to substitute the app id.
The end result looks like this:
itms-apps://ax.itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?type=Purple+Software&id=123456789