The free app lets users browse the complete Tommy Hilfiger collection product by product, or by using search filters that allows them to find items in a specific category or price range.
It also allows them to touch, pan and zoom images to view intricate product details.
Users simply click on their favourite items to add them to a cart, before checking out and filling in their shipping and billing information.
If an item is out-of-stock, shoppers can sign up for push notifications directly to their iPhones.
Kate Terry, executive vice president of global e-commerce at Tommy Hilfiger Group, said: "Our customers are already using iPhones and other web-enabled mobile devices to quickly connect and research products -- our iPhone application enables the natural next step of making a purchase.
"Creating a smooth and entertaining experience for shoppers to explore, search and buy from the brand is an important function of our web-based initiatives, so we are very excited to launch our Tommy Hilfiger for iPhone application."
The application was built using e-commerce software developed by the Art Technology Group (ATG).
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