What data does the card store about me?
The card is a random identifier and a stamp count; your account holds only an e-mail address, which places can’t see.
We don’t ask for your name, phone number or date of birth for the card. The card is a random serial number and a secret key; linked to it are the number of stamps, the redemptions and their times.
A place only sees its own cards: the stamp count, the history and — if you gave it one — the card’s nickname. It doesn’t see who you are, or at which other places you collect stamps.
Your card is linked to your guest account. The account needs only your e-mail address (Apple’s private relay address works too), no password. We also store your language and — if you choose to enter it — your birth month (without day and year). Places can’t see these. You can download your data and delete your account on the Account page.