Check If App Is Running On An iPad

Check the userInterfaceIdiom property of the device to get the information you need:

- (BOOL)isDeviceiPad
{
BOOL iPadDevice = NO;

// Is userInterfaceIdiom available?
if ([[UIDevice currentDevice] respondsToSelector:@selector(userInterfaceIdiom)])
{
// Is device an iPad?
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad)
iPadDevice = YES;
}

return iPadDevice;
}

As noted in the comments below, Apple provides a macro to accomplish the same task. Here is the full definition from the UIDevice.h header file:

#define UI_USER_INTERFACE_IDIOM() ([[UIDevice currentDevice] respondsToSelector:@selector(userInterfaceIdiom)] ? [[UIDevice currentDevice] userInterfaceIdiom] : UIUserInterfaceIdiomPhone)