I will mobile booking and appoiment saas app

Its an booking and appointment mobile app. Customers must register, log in their backend. Fron their backend their can setup their mobile app. Booking or appoitments. Modify their mobile app. When done Then push it to the iOS and andriod store. So client off the customer can doe load the mobile app. And use it. Client that download the mobile app off that user. Can setup their profile. And book or add appointment off that customer. After booking or appoitment their can do the payment or pay later. Their must be also an super admin ( my backend ) to manage the hole frondend and customers etc etc.