@trtobe: you could ask the supermarkets. Doesn't hurt. Perhaps you would have better luck promoting this idea with grocery stores that have loyalty cards? Loyal

@trtobe: you could ask the supermarkets. Doesn't hurt. Perhaps you would have better luck promoting this idea with grocery stores that have loyalty cards? Loyalty cards I suppose are already used to track specific users and what they purchase. I think working with the supermarkets are better because it results in a more frictionless experience.