John Lewis today launched its new iPhone app, following the retailer’s announcement last month that it will provide free wi-fi in all of its stores.

Created in partnership with Usablenet, Red Laser technology and The Drum’s top digital agency of 2011, Sapientnitro, the app lets users scan barcodes in-store to access product information, read and compare reviews and browse the full John Lewis catalogue.

Out of stock products can be ordered for collection or delivery using the app, and there is GPS functionality to locate the nearest John Lewis store.

Sean O’Conner, head of online delivery and customer experience at John Lewis, said the new app is part of the retailer’s joined-up multichannel approach, that it will complement rather than replace physical aspects of the John Lewis business.

“We recognise that up to a third of customers using our mobile website research shop information and even more research products online before buying,” said O’Conner.

“This app is designed to ensure they have everything they need to make an informed purchase, whether they are in-store, on the train to work, or at home on the sofa.”