Customers can check the price of their shopping against rivals by using store or online delivery receipts and will get a voucher if Asda is not 10% cheaper.

The free app, developed in collaboration with Asda’s parent company Wal-Mart, includes a barcode scanner so that shoppers can scan product items and add them to their shopping basket using an iPhone.

Asda is also developing an Android app and already has a mobile optimised website.

Kate Cuthbertson, Asda’s head of mobile strategy says the supermarket’s mobile strategy “is moving at pace” adding that there are more developments planned in the New Year.