christoph: plusfresque is a spanish supermarket chain.'re working with them through an eu sponsorship program to get foodloop working in all 70 of their stores. reporter: and what do the potential customers think of it all? >> yeah, i'd find it helpful, and it saves money, too. >> i used to throw food away, but now i'm careful to only buy as much as i can eat. >> no, i'm very picky when it comes to the best-before date. if it's even one day over, i wouldn't eat it. reporter: bernd sauer has now made it to the checkout. thanks to the foodloop discount, he's saved 2 euros on an overall bill of just under 9 euros. so, could he imagine using an app like this in future? bernd: yes. it's a good way of saving money and helping to ensure things don't get thrown away. reporter: but he'll have to wait a while. the app is still only a pilot project in germany. the major supermarket chains have yet to sign up. host: here in germany, several initiatives are trying to prevent the waste of food. the idea behind one of them is so simple that it sounds li