Ideally you can maintain a reliable connection during your event, but offline functionality is supported for the HALO and Classic apps -- just in case.
Your iPad App Can Be Used Offline
Aside from the requirements below, the app can be used offline.
Any emails, text messages, uploads, and participant data that can't be uploaded immediately will automatically be added to the app's offline queue while you're still offline.
Everything will start uploading and sending out to contacts as soon as you reconnect to a reliable network with the app open or running in the background.
WiFi Requirements
An Internet connection will be required to log into your app and to sync any settings you have adjusted from your online dashboard.
The log out button will not be available when you're disconnected from the internet to avoid an accidental sign-out, and the app will keep you logged in for at least 30 days from your last use.
Printing
Printing requires a WiFi connection but not an Internet connection.