Good news for iPhone users. Now you can create custom badges for Apps on your iPhone by using a new jailbreak tweak named as AppTag. Simply install this tweak on your jailbroken iPhone and create custom badges for Apps without using computer. You should note that this tweak will not add any new icons to the home screen of your iPhone. Simply go to Settings app of your iPhone to configure this tweak.
You can download AppTag tweak from Cydia for free of cost. You will need to have jailbroken iPhone to install this tweak. If you don’t have jailbroken iPhone then follow the steps posted here to jailbreak your iPhone on iOS 4.2.1 with Redsn0w. You can watch the video embedded below to see it in action.