Share the event page and print the poster code
Every published event has one address, shabanga.com/e/your-event, and that is what you share: text it, post it, put it in the bio. It opens as a web page with the flyer, the date and the tickets, and it buys without an account.
For a flyer or a poster, the Event QR is a code that lands on the same event page. Every scan opens the page in the browser, and the page offers the app to anyone who wants it. That is on purpose: a scan should never fail because the person does not have the app.
Print from the dashboard, where the QR panel downloads a PNG or SVG. The app shows the code and shares it; it does not save a file.
The address does not change when you edit the event, so a printed code keeps working after a date or venue change.
