Create a XMPP chat app for iOS

Hello fellow developers, We are two developers for iOS that need help (aka subcontract) a part of a bigger project, so we can dedicate our time in the parts of the project we are more familiar with... So we basically need an app wich is a XMPP-Compatible chat that will be used in a circle of people (company). We will set up the servers (Openfire), so we need an app that con connect with them. We have researched and there are LOTS of opensource projects for the specs that we need for iOS platforms, so we need someone to ADAPT AND CLEAN UP one of them. App will have 5 screens plus two preference screens. VERY VERY IMPORTANT, SEE ATTACHED WIREFRAMES!!!! WE WANT APP NAVIGATION EXACLY AS WIREFRAMES!!! Navigation considerations: 1- Initial screen: Has 'Login' and 'Create account' buttons. 1b- New account: Has 'Username', 'Password' and 'Re-type password' fields, and 'New account' button 2- Login screen: Has 'Username' and 'Password' fields, plus 'Login' button 3- Contact list tab: Has 'Contacts list' (have to be added manually, no need to search agenda... bla bla bla), 'General prefs' button, and 'Add' button 3b- Add contact screen: Has 'Username' field, 'Search' button and 'Invite' button 4- Open chats tab: Current open conversations with a delete conversation button 5- Chat screen: Has history of conversation with the contact (ala Whatsapp-style) and a 'Contact prefs' button 6- In Contact settings screen: Block, Delete 6- Settings tab: Sound (vibrate / 0-10), Status (online / offline), Exit VERY VERY IMPORTANT, SEE ATTACHED WIREFRAMES!!!! WE WANT APP NAVIGATION EXACLY AS WIREFRAMES!!! Technical considerations: - We need the app(s) to save previous conversations with each contact - We need the app(s) to connect only to our designated server (specified in the code, on a variable) - Search contact must match username 100% (and beeing only within our server) Bid considerations: - We need the complete code of each platform prepared to run on Xcode, running on a private repository to work together with us - We basically need the program, no need of fancy design or other cosmetic things although we will consider a "sober-serious-company look & feel" - We will not look after the price especially, but beeing solvent on XMPP - The app is simple for someone who has work previously with XMPP, but it is if you have not (our case) IF WANTED WE CAN PROVIDE UNIFINISHED BASIC CODE VERY VERY IMPORTANT, SEE ATTACHED WIREFRAMES!!!! WE WANT APP NAVIGATION EXACLY AS WIREFRAMES!!! Thanks in anticipation!!