UIDevice+DeviceHardware.h

//
//  UIDevice+DeviceHardware.h
//
//  Used to determine EXACT version of device software is running on.

#import <Foundation/Foundation.h>
#include <sys/types.h>
#include <sys/sysctl.h>

typedef enum {
    UIDeviceHardwareiPhone1,
    UIDeviceHardwareiPhone3G,
    UIDeviceHardwareiPhone3GS,
    UIDeviceHardwareiPhone4,
    UIDeviceHardwareiPhone4S,
    UIDeviceHardwareiPhone5,
    UIDeviceHardwareiPod1,
    UIDeviceHardwareiPod2,
    UIDeviceHardwareiPod3,
    UIDeviceHardwareiPod4,
    UIDeviceHardwareiPod5,
    UIDeviceHardwareiPad1,
    UIDeviceHardwareiPad2,
    UIDeviceHardwareiPadMini,
    UIDeviceHardwareiPad3,
    UIDeviceHardwareiPad4,
    UIDeviceHardwareSimulator,
    UIDeviceHardwareUnknown
} UIDeviceHardware;

@interface UIDevice (DeviceHardware)

- (UIDeviceHardware)hardware;
- (NSString *)hardwareString;

@end

UIDevice+DeviceHardware.m

//
//  UIDevice+DeviceHardware.m
//
//  Used to determine EXACT version of device software is running on.

#import "UIDevice+DeviceHardware.h"

@implementation UIDevice (DeviceHardware)

- (NSString *)fetchDeviceHardware
{
    size_t size;
    sysctlbyname("hw.machine", NULL, &size, NULL, 0);
    char *machine = (char *) malloc(size);
    sysctlbyname("hw.machine", machine, &size, NULL, 0);
    NSString *hardware = [NSString stringWithUTF8String:machine];
    free(machine);
    return hardware;
}

- (UIDeviceHardware)hardware
{
    NSString *platform = [self fetchDeviceHardware];
    if ([platform isEqualToString:@"iPhone1,1"])    return UIDeviceHardwareiPhone1;
    if ([platform isEqualToString:@"iPhone1,2"])    return UIDeviceHardwareiPhone3G;
    if ([platform isEqualToString:@"iPhone2,1"])    return UIDeviceHardwareiPhone3GS;
    if ([platform isEqualToString:@"iPhone3,1"])    return UIDeviceHardwareiPhone4;
    if ([platform isEqualToString:@"iPhone3,3"])    return UIDeviceHardwareiPhone4S;
    if ([platform isEqualToString:@"iPhone4,1"])    return UIDeviceHardwareiPhone4S;
    if ([platform isEqualToString:@"iPhone5,1"])    return UIDeviceHardwareiPhone5;
    if ([platform isEqualToString:@"iPhone5,2"])    return UIDeviceHardwareiPhone5;
    if ([platform isEqualToString:@"iPod1,1"])      return UIDeviceHardwareiPod1;
    if ([platform isEqualToString:@"iPod2,1"])      return UIDeviceHardwareiPod2;
    if ([platform isEqualToString:@"iPod3,1"])      return UIDeviceHardwareiPod3;
    if ([platform isEqualToString:@"iPod4,1"])      return UIDeviceHardwareiPod4;
    if ([platform isEqualToString:@"iPod5,1"])      return UIDeviceHardwareiPod5;
    if ([platform isEqualToString:@"iPad1,1"])      return UIDeviceHardwareiPad1;
    if ([platform isEqualToString:@"iPad2,1"])      return UIDeviceHardwareiPad2;
    if ([platform isEqualToString:@"iPad2,2"])      return UIDeviceHardwareiPad2;
    if ([platform isEqualToString:@"iPad2,3"])      return UIDeviceHardwareiPad2;
    if ([platform isEqualToString:@"iPad2,5"])      return UIDeviceHardwareiPadMini;
    if ([platform isEqualToString:@"iPad2,6"])      return UIDeviceHardwareiPadMini;
    if ([platform isEqualToString:@"iPad2,7"])      return UIDeviceHardwareiPadMini;
    if ([platform isEqualToString:@"iPad3,1"])      return UIDeviceHardwareiPad3;
    if ([platform isEqualToString:@"iPad3,2"])      return UIDeviceHardwareiPad3;
    if ([platform isEqualToString:@"iPad3,3"])      return UIDeviceHardwareiPad3;
    if ([platform isEqualToString:@"iPad3,4"])      return UIDeviceHardwareiPad4;
    if ([platform isEqualToString:@"iPad3,5"])      return UIDeviceHardwareiPad4;
    if ([platform isEqualToString:@"iPad3,6"])      return UIDeviceHardwareiPad4;
    if ([platform isEqualToString:@"i386"])         return UIDeviceHardwareSimulator;
    if ([platform isEqualToString:@"x86_64"])       return UIDeviceHardwareSimulator;
    return UIDeviceHardwareUnknown;
}

- (NSString *)hardwareString
{
    NSString *platform = [self fetchDeviceHardware];
    if ([platform isEqualToString:@"iPhone1,1"])    return @"iPhone 1G";
    if ([platform isEqualToString:@"iPhone1,2"])    return @"iPhone 3G";
    if ([platform isEqualToString:@"iPhone2,1"])    return @"iPhone 3GS";
    if ([platform isEqualToString:@"iPhone3,1"])    return @"iPhone 4 (GSM)";
    if ([platform isEqualToString:@"iPhone3,3"])    return @"iPhone 4 (CDMA)";
    if ([platform isEqualToString:@"iPhone4,1"])    return @"iPhone 4S";
    if ([platform isEqualToString:@"iPhone5,1"])    return @"iPhone 5 (GSM)";
    if ([platform isEqualToString:@"iPhone5,2"])    return @"iPhone 5 (GSM+CDMA)";
    if ([platform isEqualToString:@"iPod1,1"])      return @"iPod Touch 1G";
    if ([platform isEqualToString:@"iPod2,1"])      return @"iPod Touch 2G";
    if ([platform isEqualToString:@"iPod3,1"])      return @"iPod Touch 3G";
    if ([platform isEqualToString:@"iPod4,1"])      return @"iPod Touch 4G";
    if ([platform isEqualToString:@"iPod5,1"])      return @"iPod Touch 5G";
    if ([platform isEqualToString:@"iPad1,1"])      return @"iPad";
    if ([platform isEqualToString:@"iPad2,1"])      return @"iPad 2 (WiFi)";
    if ([platform isEqualToString:@"iPad2,2"])      return @"iPad 2 (GSM)";
    if ([platform isEqualToString:@"iPad2,3"])      return @"iPad 2 (CDMA)";
    if ([platform isEqualToString:@"iPad2,5"])      return @"iPad Mini";
    if ([platform isEqualToString:@"iPad2,6"])      return @"iPad Mini (GSM)";
    if ([platform isEqualToString:@"iPad2,7"])      return @"iPad Mini (GSM+CDMA)";
    if ([platform isEqualToString:@"iPad3,1"])      return @"iPad 3";
    if ([platform isEqualToString:@"iPad3,2"])      return @"iPad 3 (GSM+CDMA)";
    if ([platform isEqualToString:@"iPad3,3"])      return @"iPad 3 (GSM)";
    if ([platform isEqualToString:@"iPad3,4"])      return @"iPad 4";
    if ([platform isEqualToString:@"iPad3,5"])      return @"iPad 4 (GSM)";
    if ([platform isEqualToString:@"iPad3,6"])      return @"iPad 4 (GSM+CDMA)";
    if ([platform isEqualToString:@"i386"])         return @"Simulator";
    if ([platform isEqualToString:@"x86_64"])       return @"Simulator";
    return platform;
}

@end

usage.txt

UIDeviceHardware hardware = [UIDevice currentDevice].hardware;