development of new Android, iOS and Windows mobile applications for our existing project iQpon.

I have an existing Android,iOS,Symbian application which you can find on stores. I am planning to do a full revamp of this application by adding additional features and update the overall application design and also app to be in native code for Android,iOS and Windows Mobile.I am looking for an efficient freelancer who can complete the work on time with high quality. I am expecting a fixed price bid for this project. Also, i would like to see a very high level design approach from the bidders . So what I expect from you: 1. First ,application which I want to revamp is live on Android and iOS stores,please install and get fee of the app. 2. Complete new design and design must be METRO style . 3. New funcionality to be added ; - Users registration and log with Facebook or Twitter account - Push messages, user can receive messages in inbox - Geo-location, user open interactive map and can see on map instant locations with offers( coupons) and click on flags he can see more info or open this offer, user can choose different range 100m, 2 km,5km 15km 200km or all, can filter offer by key words (car,pizza, DM etc..) - Each offer or coupon must have unique barcode and serial number - All user activity at app shoud be shown on their facebook wall ( if they did log with facebook account) - User can rate offer and leave comment - Possibility to put more than one image for offer. For more details required, bidders can contact me.