SproutStart has a dedicated team of in-house Mobile Application developers (including iPhone, BlackBerry, Google Android, Palm Pre and Facebook apps). We work with your team collaboratively to develop apps from the ground up. Whether you know exactly what you want or you've never seen a mobile app before, we can handle things seamlessly.
The exact price of developing an application(s) depends on the intricacy of the project. For reference, a static most basic application could cost around $4,000, where a social networking application that has user interactions, etc. could easily cost $25,000.
Have a look at this informative article on 'How To Hire A Great iPhone Developer' - http://bit.ly/iPhonedevs