This page serves as a privacy policy for the Google Play store entry for this app.
The app itself collects no information beyond the registration of which conferences it's registered to talk to.
No analytics of app usage are collected, beyond those collected by the Play Store outside our control and subject to the Google privacy policy (which may include crash dumps). The app does not and will not contain ads of any form.
Camera permissions are used to temporarily scan the camera input in order to identify barcodes. Barcodes are identified locally on the device using the Google ML Kit barcode APIs. Barcode identification happens on the device, no photographic data is transmitted across the network.
The contents of scanned barcodes will be transmitted to the server of the registered conference. At the server they are likely logged and possibly analyzed, specific to the privacy policy of the individual conference instance. Beyond the barcode itself, the only data stored server side is the free-text note written when scanning a badge.