Priced per stamp = one visit stamped. Customers and cards are unlimited on every plan.
Start free. The free plan is a real program, not a trial: 200 stamps per month and one shop. No card.
200 stamps/month · 1 shop · Get a key
2,000 stamps/month · 1 shop · same poster, same cards.
10,000 stamps/month · up to 3 shops.
Card checkout by Stripe. When the free limit is reached the API says so and links here; stamping pauses but cards and customers are never deleted.