How do I restrict my app for only iPhone 6 and 6 Plus?

I know it's probably way too late, and probably doesn't answer the question anyway, but I figured 'what the heck' – it's a nice bit of code to determine ranges of devices, where in cases you may want different functionality.

#import <sys/sysctl.h>-(BOOL)isANewerDevice{    size_t size;    sysctlbyname("hw.machine", NULL, &size, NULL, 0);    char *machine = malloc(size);    sysctlbyname("hw.machine", machine, &size, NULL, 0);    NSString *platform = [NSString stringWithCString:machine encoding:NSUTF8StringEncoding];    free(machine);    NSString * ending = [platform substringFromIndex:[platform length]-3];    double convertedNumber = [[ending stringByReplacingOccurrencesOfString:@"," withString:@"."] doubleValue];//Devices listed here: https://stackoverflow.com/questions/19584208/identify-new-iphone-model-on-xcode-5-5c-5s    if ([platform containsString:@"iPhone"]) {        if (convertedNumber >= 7.1) { // 6 and above            return YES;        }else{            return NO; //less than a 6 (ie 5S and below)        }    }else if ([platform containsString:@"iPad"]){        if (convertedNumber >= 5.3) { //iPad Air 2 and above            return YES;        }else{            return NO; //iPad Mini 3 and below        }    }    //Failsafe    return NO;}

The link that's commented in the code: Identify new iPhone model on xcode (5, 5c, 5s)

Note. Due to having containsString, this will crash on iOS versions less than 8. To support <8.0, try using the following code to retro-fit this function https://stackoverflow.com/a/26416172/1197723

Have fun!