Here’s how we check that:
// if we're an iPad
if ([[UIDevice currentDevice]userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
// do some iPad or iPad Mini specific stuff
} else {
// we're on iPhone or iPod Touch
}
Alternatively you can check the same method for UIUserInterfaceIdiomPhone instead, which is returned when you’re on an iPhone or iPod touch.

Jay is founder of WP Hosting, a boutique style managed WordPress hosting and support service. He has been working with Plesk since version 9 and is a qualified Parallels Automation Professional. In his spare time he likes to develop iOS apps and WordPress plugins, or drawing on tablet devices.
He blogs about his coding journey at http://wpguru.co.uk and http://pinkstone.co.uk.