When at an event - you'll want to make sure that the only app being used is the Greenhouse events app.
Apple refers to this as "Guided Access" - when you enable "Guided Access" for your iPad - the only app that will be available is the Events app.
Set up "Guided Access"
Tap Settings > General > Accessibility > Guided Access to set up Guided Access.
- Turn Guided Access on or off
- Set a passcode that controls the use of Guided Access and prevents someone from leaving an active session
- Set whether the device can go to sleep during a session
- Start a Guided Access session
Start a "Guided Access" session
- Open the app you want to use.
- Triple-click the Home button.
- Adjust settings for the session, and then tap Start.
- Control apps, screen sensitivity, and motion sensitivity
End a "Guided Access" session
If you're using Touch ID on your iOS device, you can use it to end a Guided Access session.
- First, go to Settings > General > Accessibility > Guided Access > Passcode Settings and turn on Touch ID.
- Now, when you're using Guided Access, you can end the session by following these steps:
- Press the Home button once.
- Use Touch ID.
If you're not using Touch ID on your device, follow these steps to end a Guided Access session:
- Triple-click the Home button.
- Enter the Guided Access passcode.
For more information you can view Apple's documentation here:
Use Guided Access with iPhone, iPad, and iPod touch