Read the contact information of customers using a qr code and verify them if in doubt with a test call. That way no long waiting times will occur.

Main application:
With the companion-app Ciao QR (or alternatively the webapp) customers can generate a qr code using their contact information when they're using the app for the first time. From than on every time they visit a restaurant, a bar or a concert they can show the same QR Code which then is scanned by the app Ciao SCAN. In addition to the contact information, the date and time of the scanning is stored on the device. This list can then be exported and e.g. daily backed up by sending it to an email address.

To view the full information in the contact list, tap on the time and name row.

Example:
An event organizer reads the customer information by scanning the qr code with the camera. The data is then stored in the customer list together with a timestamp. This way the event organizer can obey the rules and easily keep track of all their customers without causing long waiting times. The organizer the can in case of a reported case inform all customers that were there at the same time.

Privacy:
Ciao QR and Ciao SCAN don't require an (internet-)connection after downloading nor does the app require bluetooth. No data is transferred to any server meaning there is no way the developers are able to access any data. There's not even a tracking method to check how the app is used which means that we rely on your feedback! The qr code generated by the companion app Ciao QR is only stored on the device itself. The customer list created by Ciao SCAN is exclusively stored on the organizer's device. This data can then be exported as a table and combined with e.g. older data or data from other devices. This might be required if multiple scanning devices are used or the organizer regularly backs up the data.

For technical users:
The app generates a JSON object from the entered data and encodes it directly in the qr code, this is verifiable with any qr code scanner. The scanner app reads the code and stores the data in addition to a timestamp. The export function generates a csv locally on the device.