What a stamp card is actually for
A loyalty card is not a discount. It is a reason to come back on a Tuesday, and the difference between those two ideas is most of your margin.

How small shops actually get customers back: what works on a counter, what a wallet card changes, and what the numbers look like when it does.
A loyalty card is not a discount. It is a reason to come back on a Tuesday, and the difference between those two ideas is most of your margin.

Six is too few, twelve is too many, and the right answer depends on how often people already come in rather than on what the reward costs you.
An app nobody downloads is not a loyalty program. Apple and Google Wallet are already on the phone, and that changes what you can ask for.
A push notification gets about four words of attention before a thumb decides. Here is what to put in them, and what to leave out entirely.
Most shops are busy when they do not need help and empty when they do. Retention is mostly about moving demand, not adding it.
The counter QR code is the whole acquisition funnel for a shop loyalty program. Most of them fail for reasons that take a minute to fix.
They are not interchangeable. One is for things that are true right now, the other for things worth reading. Sending the wrong one costs you the channel.