I have a clover checkout station.
When the person checks out, I would like to put a page there that ask for their phone number. After the user enters this info, I would like make an api call to confirm that it is a valid cell number and prompt the user if the number was incorrect. I will be doing a few other things with the number, like sending an SMS etc.
Coding is not a problem, but I am not clear on what options I have. Do I need to create a whole new app that handles the checkout process? I just need some high level explanations.