IOS App for Product Search App

We need to port our product search website into an IOS App. We're looking for someone for much experience in IOS App, as we need a good, very stable and responsive APP. Please send us some references too of previous work. We have the following basic requirements: - Using of latest XCode - App should be running on IOS6 and 7 - Important: Use ARC and AutoLayout - Clean and structured code with comments (English) - We will provide all Images/Design (as PSD or Image as preferred) - We will provide API Calls (HTTPS POST calls delivering XML data) The APP contains 5 different screens: 1) Country selection: Select a country where you want to search for products. In the first phase we have 5 different countries. Just show a list with these 5 country (Flag icon + Name of Country). Store the selection on device and do not show on next APP start. At bottom of the screen show a button to open the APP Information (see screen 5) 2) Search Results: We need a fixed header on top, with logo, keyword and Icon/name of selected country (from Screen 1). When clicking on the Country go back to screen 1, so user can change the country. When a keyword is entered send the request to our server. We return an XML with search results. The XML contains an image, title and price. Show the results in Pinterest Style View, as we have images with different aspects. We want to use three columns here. 3) Detailscreen: When a product was selected open an layer over result list and show details of selected product. Beside the full title, image and price we also have a description text and a URL to the shop offering the product. On top right of this layer there is a close button. For all infos on detail page a new xml call is needed, to get all informations (like full images, description, etc) 4) Visit Shop When button for "visit shop" on detailpage was clicked open the URL in a browser control, but keep in the App and do not pass directly to Safari. We need a WebControl (UIWebview) as Twitter uses too. 5) App Info Can be reached from Country selection. Just show static HTML content from a fixed URL.