Most comparisons on this topic come from vendors who end up recommending their own product. So you won't find a winner here. Instead you get four card types side by side, the criteria, questions for any sales call and a short test you can run yourself.
Plainly said: NFCeez makes one of these cards, so this guide is not neutral.
What must the best loyalty card do?
The best loyalty card has to be with the guest at the moment they pay, and your team must be able to stamp it in seconds under pressure. Everything else comes after that. These seven points separate a useful card from an expensive toy:
- It's with them. A card left at home earns no stamp.
- Joining is quick. No app, no password. Every step before the first reward loses guests.
- Stamping doesn't disturb service. Test it at rush hour, not in a demo.
- Fraud shows up. Your team can see who stamped when.
- You can see whether it works. How many guests come a second time?
- The data is clean. Clear rules for email addresses and marketing.
- You can leave. What happens to collected stamps if you switch?
Paper, Wallet, own app or till add-on: what's the difference?
The biggest difference is what the guest has to do and what you learn afterwards. Paper is simplest and tells you nothing. An app tells you most and is the biggest hurdle. A Wallet card and a till add-on sit in between.
| Paper | Wallet card | Own app | Till add-on | |
|---|---|---|---|---|
| What the guest does | Keeps the card | Signs up briefly, saves the card | Installs the app, creates an account | Gives a number, card or code at the till |
| With them when paying? | Often not | On the phone | If the app is still installed | Depends on the setup |
| What you learn | Nothing | Returns, stamps, rewards | The most | Also spending, depending on the till |
| Fraud protection | Weak, stamps can be copied | Good, every scan counts | Good | Good, tied to the receipt |
| Messages to guests | Not possible | Possible through the card | Possible through the app, with permission | Only if the provider offers it |
| Cost, in general | Printing | Monthly subscription | Development and ongoing upkeep, usually highest | Add-on to the till fee |
| Lock-in | None | To the provider | To developers and app stores | To the till provider |
A Wallet card sits where the phone also keeps tickets and boarding passes. Apple describes store cards for loyalty and discount cards that can show the current balance. Google points to fast access and visible points on the phone. On Apple, an update can also trigger a message, and Apple advises keeping that for what is truly time-sensitive. More in loyalty cards in Apple Wallet and Google Wallet.
Which loyalty card fits which business?
For many independent cafés a Wallet card fits, because it needs no app and still gives you figures. That isn't a rule for everyone. Four made-up examples:
- Bäckerei Hafenkorn, many older regulars who don't do much on their phones: paper can be the right choice. Short rules, a clear stamp, done.
- Café Morgenrot, one location, guests come several times a week: a Wallet card. Nothing to install, and you see who comes back.
- Bar Kobalt, full in the evenings, quiet on weekdays: a Wallet card with double stamps on quiet days, see how to fill quiet days.
- A chain with many branches and its own mobile ordering: an own app or till add-on can make sense, because the budget and the reason for an app are there.
If your till already has a loyalty module that fits how you work, try that first. Just ask whether guests need a card or app for it, and what happens to stamps if you change tills.
What do the figures and research really say?
We found no independent figures specifically on loyalty cards in cafés, only hints from neighbouring areas. Anyone selling you something else should name the source.
- Phones at the till: according to Bitkom 2025, 64 percent of people aged 16 and over in Germany pay with a phone or watch at least now and then, and 29 percent of those aged 65 and over. That shows payment habits, nothing about stamp cards. It also shows why older guests may prefer paper.
- Digital customer cards: according to Bitkom 2025, 66 percent of people with grocery retailer apps use digital customer cards or loyalty programmes there. That's supermarkets and app users only, not cafés.
- A head start on the card: Nunes and Drèze showed in the Journal of Consumer Research in 2006 that people are more likely to finish a task, and finish faster, when two of ten steps are already done rather than none of eight. The test used a car wash, not a café. It's worth trying, but nobody can promise a result.
What does a loyalty card cost day to day?
The card itself is rarely the biggest cost, the rewards are. With paper you pay for printing, with Wallet solutions usually a monthly subscription, with your own app development and permanent upkeep, and with a till add-on a surcharge. On top come free items and your team's time. Ask about every fee, including per card or per message.
An example with made-up numbers: Café Morgenrot sells coffee for 4 euros, and the ingredients cost 1 euro. With a 10-stamp card, the reward costs 1 euro of goods for every 10 coffees sold. Your real numbers show how much you can give. How many stamps make sense is in planning a loyalty programme.
What about data protection?
As soon as you collect email addresses, rules apply, and in Germany email marketing generally needs prior explicit consent under section 7 of the Unfair Competition Act (UWG). Paragraph 3 holds a narrow exception for existing customers with four conditions. So keep signing up for the card separate from agreeing to marketing. If a provider processes data for you, you need a contract under Article 28 GDPR. The details are in loyalty programmes and GDPR. If unsure, ask your local chamber of commerce (IHK).
What should you ask any provider?
- Does the guest have to install an app, or create an account or password?
- Does the card work on iPhone and Android, and what happens without a Wallet?
- How many seconds does a stamp take at the till at rush hour? Show me.
- What can I change without guests losing stamps?
- Who can see which team member stamped when?
- What figures do I get, and do they count returning guests or only sign-ups?
- What does it cost in total, including per card, message or location?
- Where is the data stored, and is there a contract under Article 28 GDPR?
- What happens to my guests' cards if I cancel?
How do you know the card is working?
The card is working when guests return more often, not when many sign up. After 90 days, look at one simple share: how many signed-up guests came at least twice? A made-up example: 200 sign-ups and 80 guests with two or more stamps is 40 percent. No industry figure tells you whether that's good. Comparing it with your own earlier months does. How to work out a regular's value is in what a regular is worth.
What does a Wallet card look like on a normal café day?
Here is how it works in NFCeez, which we make. You design the card once in the app: colours, stamp symbol, logo and up to three rewards, each at its own stamp. Guests tap the stamp card on your Smart Page, confirm their email with a code and add the card to Apple Wallet or Google Wallet. Anyone without a Wallet keeps it in the browser. When they pay, your team scans the card in the app, picks the number of stamps and confirms. Every stamp is logged with the time and the team member. On a quiet day you switch on a Boost with double stamps, and the app shows how many of your members came at least twice. The digital stamp card page shows what it looks like.
The limits: NFCeez isn't a till, takes no payments and isn't connected to your till. Stamps come from a scan, not automatically from the receipt, and signing up by email is one small step more than a paper card. You still need your till. In Germany, anyone recording sales electronically must use a TSE security device under section 146a of the Fiscal Code and the KassenSichV.
How can you test this week?
Tomorrow morning, ask ten regulars whether they'd save a card in their Wallet or prefer paper. Then take two offers, put the same nine questions to both, and have someone on your team stamp at rush hour. If it disturbs service for longer than a stamp on paper, you have your answer.
How NFCeez does thisA card that's there when they pay.Guests add the card to Apple Wallet or Google Wallet with a code sent by email. Your team stamps by scan, and you see who comes back.See how it works- Apple Developer: Apple Wallet
- Apple Developer: Wallet Developer Guide, Updating a Pass
- Google for Developers: Loyalty cards in Google Wallet
- Bitkom: Auch immer mehr Ältere zahlen mit Smartphone oder Smartwatch (2025)
- Bitkom: Apps von Lebensmittelhändlern werden immer beliebter (2025)
- Nunes and Drèze: The Endowed Progress Effect, Journal of Consumer Research, 2006
- § 7 UWG
- Artikel 28 DSGVO
- § 146a Abgabenordnung
- Kassensicherungsverordnung (KassenSichV)



