Check-ins are GPS verified. We are not doing a hardware solution like Shopkick, but we also aren't allowing SMS checkins like foursquare. We've gone for a middl

Check-ins are GPS verified. We are not doing a hardware solution like Shopkick, but we also aren't allowing SMS checkins like foursquare. We've gone for a middle ground. No GPS coordinates that fit in the lat/long we've set as acceptable around the venue then no check-in. Merchants are charged based on check-ins.