Basic 3 screen Xamarin mobile application

This project is related to a simple promotion mobile application, you can find the screens of mobile application attached. We already have the Xamarin application with all UI but we need to change modify few icons and screens things to make it professional and finished UI and get it worked for Android and iPhone. App consist of three screens: 1st- The welcome screen where the user can select City and Category, with a button to get current city location automatically. 2nd- This screen should have an image slider on top and the list of promotions related to the city and categories selected. 3rd- This is detail screen of promotion selected from the 2nd screen, it will have the first image at the top with some share icons and a slider which on click will open the image on the full screen where the user can zoom in and out and share. After the UI is done we will provide the web services you required to integrate into the application. We will provide all images required. Budget for this app is approx $100-$150 for Xamarin and I hope that an expert can do this in a day or two.