Independent convenience stores are the big winners from Shop Scan Save, the app that pings its 16,000 users daily rewards and offers to cash in at PayPoint stores.

Mobilize, which created the app, said 75% of purchases were being made at indies – the result of the number of offers on top-up groceries – such as milk and butter – and treats including chocolate and crisps.

The developer also said that 63% of savings, which can be redeemed at over 23,000 stores in the UK, had been made by men.