The check in app is browser based and works on any device with a browser and a camera.
To use the IPad for check-in , open the browser, type in the URL for the check in app:
use the following URL
or the respective cluster name with /o/ behind it
Log in entering your user name and password.
Select your event.
Select "Scan QR Code" to scan your participants QR codes using the iPad camera.
Or search for a participant using the search bar to check them in Manually.