This app can be used by exhibitors and sponsors at trade shows, exhibitions, conferences, and other events, if these events use the pretix ticketing system.
If you have an access code for this app, you can log in and start scanning badges of other attendees. You will see their contact information and can take a note on the conversation you had with them. You can later download all contact info and your notes from a events ticketing website to use for your marketing efforts.