Stempeljakten (The Stamp Hunt) was an app for Circle K stations in Norway.
Costumers downloads the app and then scan a QR code at the station they visits.
A question pops up, and if the answer is right, they will get a stamp. When they have collected 3 stamps they get a free coke or a ice cream.
It wasw also weekly prices that they can win, like a hammock.
