It is an app that puts a coupon stamp when you drink coffee. Coffee shops use in-store apps. When the QR code corresponding to the number of coffees ordered is created and displayed in the store app, the user earns coupons by 'Get Coupon'. 'Use coupon' shows the number of coupons accumulated in the coffee shop and the distance from the current location. You can visit the coffee shop where the coupons have been accumulated. If you collect 10 or more, you can pay with a coupon.
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