How your cards work

Your cards live in this browser

The first time you scan a shop's QR, Corner quietly sets up a guest wallet for you. No name, email or phone number is needed.

Your stamps, points and rewards are stored safely on Corner's server. This browser holds the key that says the wallet is yours.

When you could lose them

If you clear your browser's data, switch phones, or open Corner in a different browser, that key isn't there anymore. Your stamps still exist, but we can't tell they're yours.

Because we don't collect your details, we can't look you up and restore them for you, and shops can't add lost stamps back.

Keep them with a card key

A card key is a short code (like 7K2QF-M9X4P) with a QR. Save it as a screenshot. On a new phone, open the QR with your camera or go to Move to this phone and type the code. Your cards move over.

The key works once per move; anyone who has it can take your cards, so keep it private. Lost it? Make a new one in Profile and the old one stops working.

Or sign in to keep them anywhere

Sign in with your email (a 6-digit code, no password) and your cards follow you to any phone or browser. This is the most reliable way to never lose a stamp.

Signing in uses your email only to sign you in and to send reminders you ask for.

What shops can see

Shops see a member number, your visits and your stamps. They don't see your name, email or mobile number.

You can choose to share your name and contact with a shop, one shop at a time, from that shop's page. It's always off unless you turn it on, even after you sign in, and you can turn it off anytime.

Get the app

Add Corner to your Home Screen for one-tap access. On iPhone, the Home Screen app keeps its own storage, so bring your cards with your card key or by signing in.