Sales Ordering Mobile app using Google Web App

Looking to get create a Mobile App - It is customer facing app should work on Website, Android, Iphone Price will be filter based on the category of the Dealer. 1. Sales Order processing - Show product image and option to add qty and add to card 2. Collection Shipping details [login to view URL] code or offer code apply - Show all offer and apply code - All Promotion code will be listed in the Sheet 4. Payment processing 5. Send email notification to sales team email ids. 6. update order data in sales order sheet. 7. Few Other forms option need to be added - Registration for form, Special Pricing request for big projects. 8. Using the Same Mobile App our sales team should be able to order on customer behalf - Sales team enter the Registered email id of customer (that need to be verified).