While handing out your iPads to customers to collect feedback, it is advisable to lock the home button. This prevents customers from navigating to other apps or settings on your device.
You can use the Guided Access mode feature in iOS to facilitate this. This short article explains how you can enable this feature.
First, enable Guided Access from your device settings.
Then, open the Elegant Surveys app and press the home button three times. This prompts a lock code that to be entered that can be used to exit Guided Access mode when you are done.
To exit, simply press the Home Button three times and enter the passcode that you had setup earlier.
If you need additional help, contact firstname.lastname@example.org