Write an iPhone application

Hi I need a iphone Project with backend Some of functionality are outlined as follows Employee ----------------------------- 1. Custom login 2. Work calender w/ apoinments(Google cal?) 3. PDF storage ( blank invoice, receipts, estimates) ability to print them. 4. Access to customer information (name, phone number, address, email) 5. Ability to pin a invoice to a customer profile 6. Ability to swipe / punch customers debt card to pay their invoice. (Sending receipt to my email and customers) 7. Ability to send invoices via email to customers. 8. TIME clock (allows them to punch in and out for break then back in) would like to have these saved to our site from the app so we can look back on them. 9. Ability to create invoices Admin ------------------------------ 1. Ability to add / edit calender 2. Ability to upload new PDF to storage 3. Ability to add and edit customers 4. Ability to create and remove accounts Basically i want to go paper less with my business