When you publish your survey to the Feedbackly iPad app, you will likely want to lock the iPad so that customers cannot exit the app. This is very easy to set up and only takes a few minutes. Using the guided access feature in iOS, you can disable every shortcut that is used to exit apps, including the home button.

Guided Access:

Step 1: Download the Feedbackly App

Step 2: Publish your survey to the app (Find instructions on how to do that here)

Step 3: In the iOS Settings menu, select General

Step 4: Select Accessibility

Step 5: Turn on guided access

Step 6: Open the Feedbackly app

Step 7: Triple click the home button

Step 8: Click 'start', set your passcode and you're done!

If you want to exit the app, just triple click the home button and type in your passcode.