Digital card
The card in the members app and the wallet pass. Tap Add a stamp to fill the next one. The tenth pops.
Variation
0 / 10
In the real app the QR rotates every 60 seconds, so a screenshot of someone else's card stops working. The countdown here is a mock. Stamps count on coffee only; a bánh mì still records the visit.
Wallet pass (front)
Miss Saigon cà phê
STAMPS7 / 10
Member
[Name]
Reward
10th cà phê on us
MS-000123
Paper card
US business-card size, 3.5 × 2 in. The paper card is the backup for a dead phone or the launch rush. When a customer joins, staff import the stamps once.