test

NSString *urlStr = [NSString stringWithFormat:@"itms-apps://itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?type=Purple+Software&id=%@&pageNumber=0&sortOrdering=2&mt=8", APPID];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlStr]];

NSString *urlStr = [NSString stringWithFormat:@"itms-apps://itunes.apple.com/app/id%@", APPID];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlStr]];