Hello. Unfortunately Wix does not allow for much custom functionality, but I would love to help you. I can build your appointment scheduling application to specification in a short amount of time. It will be mobile-friendly, and I can make appointment confirmations, notifications, calendars, variations, anything you need. Please contact me with further details and I can give you a more structured proposal. I hope to hear from you soon. The milestones I've written are just provisional and are open to discussion as well of course.