For business, finding the right iPhone application development company can be a key factor to adapting their product to the marketplace and for the right audience. How much does an iphone app cost to develop? Really, it all depends on the scope of work, what is entailed and time. The cost for a reputable, US based iPhone application development company ranges on average from $100-$200 per hour for a well defined polished iPhone app. Below are just a few approximations based on average man hours to complete.