Simple Data Driven App

I am planning a very simple iphone app which does the following 1) [screen 1 - Login ] Validates the login ( i already have a web service ready) 2) [screen 2 - Product Listing ] Display list of products for that user (I also have a web service ready for this) 3) [screen 3 - Product Details/Edit] user can click on [screen 2] product and come this screen where he can edit product name/type- On the same screen he can click a button [view sales] to view product sales. 4) [screen 4 - Product Sales Listing] This screen appears after user clicks [view sales]. This screen will list all the sales for that product. Here user can click any sale [table cell] to claim this sale [claim] and can go to screen [ 5] 5) [screen 5 - Claim] - Here user can see sales data and confirm its claim. 6) [screen 6 - Claim confirm] - here you can see a message that your claim has sent. 7) [screen 7- Claim History] ) This will show a history of your claims via web service ( ( i already have a web service ready) ) 8) [Sign out]