Design an iOS App Mockup

We need an iOS mockup for our app idea. We are creating an app that lets users upload listings of items they wish to sell. Very much like Craigslist/Gumtree. Users upload pictures of their unwanted things (like a bike for example) they take a photo of it and say a few words about it. Other users view these listings and can contact the seller directly if interested. The app design must: -Be congruent with itself. -Have a version that fits the iPhone 4 & 5 screens -Include all pages/screens of the app -Be convenient and accessible -Be original works, copyright and royalty free -Look great of course. If you design extra screens for the iPad and/or Android devices, it would be a massive bonus! (But it's not necessary. No not sacrifice quality for quantity) Attached: -Hand drawn mockups of the app screens. -Two mockups of a listing page. These are guidelines, do not copy them fully. All of the hand drawn pages we want done, including all of these; -View Listings [A screen that displays all of the listings, Must include Picture, Title, Description] -View Listings->Individual Listing Page [A screen for an individual listing, Must have Pictures (up to 20) Title, Description, contact details (name, home phone, mobile phone, address, best contact time) a report button, add to saved listings button] -View Listings->Individual Listing Page->Report [The report screen/pop-up that asks the user why they are reporting the listing, and a confirmation screen] -View Listings->Search [When the search bar is tapped, how the screen looks, must still include the sort button] -View Listings->Sort [A scrollable screen that lets users sort the category of listings, location of listings (Auckland, Christchurch, Wellington, Nelson etc...Dummy text is fine), price range of listings (min->max, max->min), date listing was uploaded (new->old, old->new)] -View Listings->Sort->Categories [A scrollable screen that lets users sort what category listings they want to see, they could be a list of (cars, electronics, books etc...) that have toggles/ticks when tapped] -Startup screen [The screen that is displayed when the app is loading up] -Favourite/Saved Listings [A view of all the listings that the user has saved, and if the user has none, a screen displaying that the user has no saved listings] -Sign up/log in screen [With a skip button] -Add listing (step 1) [The first of 2 steps a user takes to upload a listing, must include, Title, Description, Location, Contact(Name Location Phone, Email, Best time to contact] -Add listing (step 2) [upload pictures] -Add listing [confirmation screen(of all users inputs)] -Terms &Conditions [Dummy text] -About page [Dummy text and images with left aligned picture & right aligned text then right aligned picture with left aligned text for some part of it] -Account page [Users email, contact, password changing section and users current active listings] All of the design files are needed with this project. We need the PSD files (with layers). Use dummy text as a placeholder. We have no logo at the moment but our company name is likely to be Sturwood. If you need ANY clarification, please ask. IMPORTANT: The app screens can be scrollable! Do not try to fit everything on the iPhone's height if it won't fit. Just send along an extra tall screen to show what's below the iPhone's view. May the odds be forever in your favour!