updating android app and iPhone app

I'm looking for a serious developer/developer team who delivers what he promises. The job is updating a android app and iOS app with a few new features but it is mostly UI changes. The skills needed is: MySQL PHP Android development iOS development The app uses GPS/WiFi to determine the users current position. The app also send/recieve data to a webserver/MySQL DB. If you have the mentioned skills, please provide me with information about hourly rates, and we can discuss the job in details. I can prowide you with excisting source code for both android/iPhone.