First Stage

Develop frontend iphone application that is able to perform following use cases :

1). Create/Add/Delete/Update product catalog ( one row product (no hierarchy) definition with max 20 attributes)
2). Create/Add/Delete/Update discount ( one row discount operator definition and id)
3). Create/Add/Delete/Update account information ( Company Name, VAT, address ids, payments ids, discount,product)
4). Create/Add/Delete/Update contact details (address, zip, email, telephone, sms etc).
5). Create/Add/Delete/Update payment information (accounts, payments issues, received)
6). Create/Add/Delete/Update inventory of products for account
7). Create/Add/Delete/Update invoice (use case of 1 - 6 should be used during invoice creation)
8). Specify interface for backend (WSDL)

Simple look& fill of application. Simplicity of creation of invoices is a must.

Second Stage Develop backend on amazon webservices