A digital stamp card that lives in Google Wallet today — Apple Wallet support coming soon. Run double-stamp weekends, bonus rewards, and flash offers — all from your phone. Your customers see it the moment you save it.
The stamp card
No paper. No app downloads for your customers. Just a QR code on your counter and a card in their wallet.
Print your counter QR
Generate your poster from the dashboard, print once, stick it next to the till.
Customer scans to join
First visit: they scan, create their wallet card in seconds. No app store.
Stamp on every visit
You scan their card. The stamp pushes to their wallet so they remember to come back.
Static QR
Print once, mount on the counter. Rotates internally — no reprints.
Wallet-native
Updates push to your customers' lock screen the moment they earn a stamp.
Shared customers
One card for the whole neighborhood. Discovery built in.
Instant promotions
Launch double stamps or a flash reward in under a minute.
Promotion engine
Three ways to nudge your regulars. Set up in under a minute, live the moment we approve it.
Each scan counts as 2× during the window. Best for filling quiet shifts.
A separate one-time reward for visiting during the period — independent of the main card.
Offer an automatic perk around the customer's birthday without extra staff work.
What you can run
Mix and match. Stack a happy hour on top of your stamp card. Send a coupon by birthday. The wallet handles the rest.
Stamp card
Buy 9, get the 10th free. The classic, with the math done for you.
Birthday gift
Free pastry in their birthday week — automatic, no list to keep.
Happy hour
Double stamps on slow days. Pick the weekday and time window.
Bonus reward
A separate freebie this week, on top of the main stamp card.
Referral
Customer shares a link. Friend joins, both get a stamp.
Pricing
We're rolling out with a handful of pilot partners. Get on early and lock in the founding rate.
Pilot
Free during the pilot. Forever-free for first 25 partners.
€0
Solo
One location, one program, unlimited customers.
€19/mo
Multi-location
Up to 5 locations and unlimited promotions.
€49/mo
Get the app
No App Store, no downloads. Tap a button on iPhone or Android and your stamp wallet lives one tap away — even offline.
On iPhone — Safari
Tap Share, then Add to Home Screen.
On Android — Chrome
Tap menu (⋮), then Install app.
Part of the Yayando ecosystem
Karta is part of the Yayando network — the local discovery platform for cafés, bakeries, restaurants and shops. Your business is automatically listed so nearby customers can find you, follow you, and start collecting stamps.
Auto-listed
Verified Karta partners appear on Yayando with a badge.
Nearby discovery
Customers find you by location, category and active offers.
One profile
Manage hours, photos and promotions from one dashboard.
Cross-promotion
Featured in Yayando's neighborhood guides and newsletters.
Free during the pilot. Setup in 10 minutes. Cancel any time.
No credit card required.