I'd say that it's possible on a Mac, but not on an iOS device. You can't develop iOS apps on an iOS device, for starters. Just that is an additional encumbrance

I'd say that it's possible on a Mac, but not on an iOS device. You can't develop iOS apps on an iOS device, for starters. Just that is an additional encumbrance. Last time I checked, you also need some dev account with Apple to upload apps to your iOS device. (Remember, these rules are subject to interpretation, in court in the extreme case.)