Prevent guests from leaving the app with Guided Access
Did you know that iOS has a built-in feature you can turn on that prevents your guests from leaving the app? It's called Guided Access.
Learn how to enable guided access in Settings -> Accessibility, and how to activate it on your device: https://support.apple.com/en-us/HT202612
Once you've enabled Guided Access, launch the Booth.Events app and then activate Guided Acess -- usually with a triple-click of the power button.