ACI Worldwide said that its payments technology will be used by U.K. supermarket chain Co-op Group Ltd. when it expands a mobile app-based cashless trial to 30 of its stores in England, Scotland and Wales by late August. 

The expanded trial will allow customers to scan their purchases on a mobile app while shopping down the aisle at the grocery stores. The mobile scanning technology works alongside the chain's cashiers and cashierless checkout as a means to help speed the shopping process during high volume traffic periods during the day. 

The mobile scanning app allows the cost of the purchase to be deducted from a customer's Apple Pay or Google Pay account, according to the supermarket. 

The co-op developed the mobile app using a mobile SDK developed by ACI and is a long-standing customer that has used ACI's UP Merchant Payments solution for card processing and secure payments data, Dan Ring, a spokesman for ACI, said via email. 

ACI also runs a cloud-based wallet service for the Co-op's loyalty program.