Walmart is getting the jump on Amazon to make checkout lanes obsolete as the world's largest retailer is rolling out a mobile app that enables to scan and pay for items without the need to wait in line, according to multiple media reports. 

Amazon tested its own self-checkout option, Amazon Go, at a single location in Seattle last year that was only available to company employees. At the time, Amazon planned to open the Amazon Go storefront to the public some time this year.

Meantime, Walmart is rolling out its Scan & Go app to more than a dozen stores in Arkansas, Florida, Georgia, Kentucky, South Dakota and Texas.

Shoppers without a smartphone can get in on the action as well, as Walmart will provide them with handheld scanners.

Consumers who do not wish to link a payment account to the Scan & Go app can finish their shopping and visit a self-checkout register where they scan a barcode to pay for their items.