Nothing you will ever build will work on iOS, because the minute you make money with it, Apple will kick you out.
Remember headphone jacks? Why do you think they got removed? Because all banking apps were using them, including paypal, square, hsbc and others - due to Apple not leaving any other option to build a credit card reader except by using an audio stream. And then even that got removed :)
Remember headphone jacks? Why do you think they got removed? Because all banking apps were using them, including paypal, square, hsbc and others - due to Apple not leaving any other option to build a credit card reader except by using an audio stream. And then even that got removed :)