It can cost you thousands of pounds if you get the pros in to create it for you. But if you are looking for a basic iPhone app you can use an iphone app builder online.
The majority of these online iPhone App Builder sites are easy to navigate and there is no need for programming. The good think is you can create and fiddle around with an app and you will not have to make any payment until you decide to take things further.
It may be a free app you are creating to give away or you can start to earn by the many millions of iphone users the world over.
Try one of the iPhone app builders today and create the perfect app for your business.