Fidelio

Fidelio lets cafés, salons, restaurants and other small businesses run a loyalty program from a phone. Create customers and issue loyalty cards — stamps, points, time-limited challenges or deliveries — or memberships with an expiry date and a number of visits.

Customers add their card by scanning a QR code or over NFC, and keep it in the free Fidelio Wallet app on Android or iOS. At the counter, the business scans a short-lived, cryptographically signed code from the customer's phone, so a screenshot can't be reused.

Everything is stored on the business phone: no server, no account and no monthly fee. A daily automatic backup goes to a USB stick.

Up to 10 cards are free. A paid activation licence unlocks unlimited cards. The source code is published under the AGPL-3.0.