Add a feature to exisiting simple iphone app

Add a feature to exisiting iphone app Please bid only after reading the description carefully. We have a simple iphone app which has been built for people with less reading abilities. so they can dial a call using the contact's photo. This is how the app works. -App Main screen has all the contacts displayed as shown in the image1.png. -Contacts are arranged on the main screen by drag and drop. -Contacts are added by tapping on to the blue color 'Plus' Icon shown in the image1.png. -Add Contact window is shown in image2.png. Please note, This app and phone Address book have no any connection. -When tapped on a contact, the single contact window ([login to view URL]) will appear. So the user can make a local call or a facetime call. The adjustment that we need is We need to make the contact at the top right corner on the main screen (see [login to view URL]) to be an special contact. That mean, this contact cannot be moved, edited or deleted without a master password being provided. Currently the app does not have any password system. So you need to impliment a master password system to handle the special contact matter. Thats it. Technical Details of the app. Programmed using Swift v 2.1 and build by Xcode v 7.2.1. Once we alwarded the project, we ill provide you the current application solurce code. Also please note, that this app has not yet been published in the app store.