I don\'t want my app to run on an iPhone or iPod with any OS prior to 3.0. I was under the impression that the App store would take care of it for me, but I don\'t think that i
You can check for
float version = [[[UIDevice currentDevice] systemVersion] floatValue];
and then display a UIAlertView. But the App won't even start, because OS requirement you set in your project settings.
But remember: The User will be still able to download it.