to check before hiring an iPhone app development company is to check their credentials and their previous work for the other clients. You should make sure that the company that you are selecting has good experience in creating the apps as well as designed that are already published within the Apple store. Search in their websites to know well about the apps that have been already developed by them. Also, try to ask few screenshots of different apps that were developed by them.

Developing application generally has two phases: one just creating an application and next coming up with a plan to create an application.