Open this page on both phones. Make one the counter tile, the other the customer.
K
Kaffehuset
Nørrebrogade 42
Tap for kvittering
Hold din telefon her.
…eller scan
KVITTO
Demo setup
Set this on the tile phone, then send the link to the second phone so both match.
KVITTO
Running it with two phones
On the tile phone, set the café, items and stamp count under Change café, item and stamp count, then save.
Send the address-bar link to the second phone, or scan the QR on the tile screen. The settings travel with the link.
Phone one: This phone is the tile. Lay it flat on the desk.
Phone two: This phone is the customer. Hold it to the tile and tap the screen once.
The card shows nine of ten, the tenth stamp lands, the reward fires, then the receipt, Wallet and the review prompt.
Phones can't do a real NFC handshake through a browser, so the tap is a screen tap. Save as PDF uses the phone's own print sheet; save as image draws a real PNG. The email step is staged — nothing leaves the phone.