We are having an experience of 5 years in particularly iPhone development. We have worked with more than 100 clients in my work tenure & also uploaded more than 500 applications on App Store.
We will provide you full support throughout the development. We will also provide you a BETA version of this application which you can test in your iPhone device. Once you approve the app, we will upload it on Apple store without any cost. We will also provide the source code of the application.
We presenting you a ballpark estimate here after taking overview of your requirement. If you can provide me the website of your application, then it would help us to provide you a more realistic estimate.