@Dhennrich, do you have a merchant account? Are you processing credit card payments now, just not on the iPhone?
If you do not, you have a lot to accomplish before you can even begin thinking about coding a mobile app. Each payment processor will have their own protocols to work with.
You might want to google “Square Up” and get their app, if you just need to take credit card payments on your mobile device. There is no tie in to a back end, you swipe cards, or hand enter information, they do all the credit card work and you get money in your account. They DO NOT have a public facing API that I’m aware of to write your own apps!
You might also want to investigate paypal as an option. They do have publicly facing API so you could roll your own app with Paypal. But again, you’ve got to do a lot of research and learning about their protocols before you can start figuring out the Corona side of things.
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