How digital loyalty cards appear on your customers' phones without them needing to download an app — and why this completely changes the relationship with your brand.
The End of Physical Loyalty Cards
How many times have you heard a customer say "I forgot my card at home"? Physical loyalty cards have a fundamental problem: they depend on the customer remembering to bring them. Studies show that over 60% of physical loyalty cards are used only once before being forgotten in a drawer or wallet.
Digital cards for Apple Wallet and Google Pay eliminate this problem. They are always on the customer's phone — the one object people never forget. And best of all: the customer does not need to download any app. Zero friction.
How It Works Technically: PKPass and Google Wallet API
Before diving into the benefits, it is worth understanding the technology behind it.
Apple Wallet — PKPass Protocol
Apple uses the PKPass format, which is essentially a compressed file package (.pkpass) containing:
- pass.json — all card information (customer name, points, loyalty tier, barcode)
- Images — brand logo, icon and background image
- Digital signature — an Apple certificate ensuring the card is legitimate
- Manifest — an integrity verification file
When the card needs to be updated (e.g. the customer's points have changed), the server sends a silent push notification to the device, which automatically downloads the updated version.
Google Wallet — Google Wallet API
Google uses a JSON Web Token (JWT) based approach. The card is defined as a JSON object that includes a class (card template) and an object (customer-specific data). Updates are made via REST API calls directly to Google's servers — the card on the customer's phone updates automatically.
The Customer Journey: From Zero to Card in 10 Seconds
The customer experience is extraordinarily simple:
- Receives a link — via SMS, email, QR code at the counter, or even WhatsApp
- Taps the link — the phone automatically recognises the card format
- Confirms "Add to Wallet" — a single tap
- Card installed — it appears in Apple Wallet or Google Pay, ready to use
There are no lengthy forms, no apps to download, no passwords to create. In 10 seconds, the customer has the loyalty card on their phone — and there it stays, permanently.
Did you know? The retention rate for digital wallet cards is 8 times higher than for physical cards. A physical card is forgotten; a card on the phone is always present.
The 5 Benefits That Change the Game
1. Geo-Fencing: Notification When the Customer Passes Near the Store
This is arguably the most powerful feature. You can configure a geographical zone (geo-fence) around your store. When a customer with the digital card passes through that zone, they automatically receive a notification on their lock screen: "You have 50 points to use! Stop by the store today."
Imagine the impact: the customer is walking down the street, receives the notification, and decides to come in. Without this technology, they would have walked right past without thinking about your brand.
2. Automatic Real-Time Updates
Whenever the customer makes a purchase, the points balance updates automatically on the card. No need to open an app, no need to ask the staff member "how many points do I have?". The customer looks at their Wallet and sees everything up to date.
3. Segmented Push Notifications
You can send push notifications segmented by purchase behaviour:
- Customers inactive for 30 days — "We miss you! 20% off your next visit"
- Customers close to the next tier — "You are just 15 points away from Gold level!"
- Birthdays — "Happy birthday! We have a gift waiting for you in store"
- Relevant launches — based on the customer's purchase history
4. No Printing or Distribution Costs
Physical cards require design, printing, reprinting when conditions change, and distribution. Digital cards are created once and distributed instantly at virtually zero cost.
5. Real-Time Data and Analytics
You know exactly how many customers have the card installed, how many removed it, which notifications drove the most visits, and what the purchasing pattern is for each segment.
Real Scenario: The Birthday Offer
Let us look at a concrete example. A chain of cafes in Lisbon implemented digital cards with the following automation:
- 7 days before the customer's birthday, the card updates to show "Birthday Gift Available"
- On the birthday, the customer receives a push notification: "Happy birthday! Your coffee and pastel de nata are on us today"
- When the customer passes near any of the chain's stores, they receive a reminder on screen
The result? Customers who received the digital birthday offer were 4 times more likely to visit the store during their birthday week, compared with customers who received only a generic email. And 68% of those customers brought at least one other person — meaning the free offer generated additional revenue.
Cost Comparison: Physical vs. Digital
For a base of 5,000 loyalty customers:
- Physical cards: Design (€300–500) + Printing (€0.30–0.80/unit = €1,500–4,000) + Annual reprinting + Manual distribution = €2,500–6,000/year
- Digital cards: Platform setup (included) + Monthly platform subscription (€50–200/month) + Automatic distribution = €600–2,400/year
Beyond the lower cost, digital cards offer features (geo-fencing, push notifications, real-time updates) that are simply impossible with physical cards.
How to Implement in 4 Steps
Step 1: Card Design
Define the card's visual identity with your brand — logo, colours, and what information the customer sees (points, tier, active offers). Less is more: the card should be clean and easy to read.
Step 2: Platform Configuration
Use a platform such as Holla Cards to create and manage the cards. The platform handles all the technical aspects — Apple certificates, Google Wallet API integration, push notification server.
Step 3: Multichannel Distribution
Distribute the card through the channels where your customers already are:
- QR code at the counter or table — the customer scans with their camera and adds to wallet
- SMS after first purchase — SMS open rate exceeds 95%
- Welcome email — with a direct "Add to Wallet" button
- Social media — shareable link in stories or bio
Step 4: Campaign Automation
Set up the automations that will work for you 24 hours a day: welcome message, unused points reminder, birthday offer, inactive customer reactivation, and segmented seasonal promotions.
Practical tip: Start with just two automations — welcome and birthday. These generate the greatest immediate impact with the least configuration effort. Then expand gradually based on the data you collect.
Who Is It Right For?
Digital loyalty cards work especially well for:
- Restaurants and cafes — frequent visits, low-to-medium average ticket
- Specialist retail — clothing, cosmetics, sports shops
- Beauty services — hairdressers, spas, barber shops
- Gyms and studios — frequency-based loyalty
- Clinics and practices — loyalty through regular appointments
If your business depends on customers returning regularly, digital wallet cards are one of the most effective and affordable ways to increase retention.
The Next Step
The transition from physical to digital cards is not a question of "if", but of "when". Portuguese consumers are already accustomed to using their phone for payments, boarding passes and event tickets. The loyalty card is the logical next step.
The question is simple: do you want your customers to remember your brand only when they open their wallet, or do you want to be present on the screen they check more than 100 times a day?
