London's
Stamp Cards,
All in One Place🍪
Forget paper stamp cards. Collect digital stamps at London's cafés, restaurants, and shops with CouKey, and earn rewards.
Simple. Powerful. Instant.
Getting started with CouKey is simple — whether you're a customer or a business owner.
Download the App
Get CouKey free on iOS and Android.
Visit a Store
Find participating cafés, restaurants, and shops near you.
Scan QR Code
Show your QR code at checkout to collect stamps instantly.
Earn Rewards
Complete your card and receive free coupons and rewards.
Everything You Need
CouKey comes packed with features to make loyalty simple for customers and powerful for businesses.
Digital Stamp Cards
No more losing paper cards. Collect stamps digitally on your smartphone.
QR Code Scanning
Quick and easy — scan a QR code to collect stamps in just one second.
Coupons & Rewards
Complete your card and coupons are issued automatically. Free drinks, discounts, and more!
Multi-Store Events
Join stamp events across multiple stores and earn special rewards.
Store Discovery
Find participating stores near you on an interactive map.
Real-Time Notifications
Never miss a stamp, coupon, or event — you'll be notified instantly.
Grow Your Business with CouKey
Boost customer loyalty and drive repeat visits with digital stamp cards — no cost, no hassle.
- Eliminate paper stamp card printing costs
- Real-time customer return rate tracking
- Role-based staff management (Owner, Manager, Staff)
- Flexible stamp policy configuration
- Collaborate with nearby stores via multi-store events
- Completely free — no monthly subscription fees
Ready to Get
Started?
Whether you're a customer looking for rewards or a business owner ready to boost loyalty — CouKey makes it effortless.