If your room displays are left out in the open, you may worry about people closing the app to play Fruit Ninja or watch Netflix. Fortunately, both iPad and Android have a "kiosk mode" that solves this problem. With a simple device-level setting enabled, you can prevent wandering coworkers from easily closing a specific app.
Pinning is available for tablets running Android 5.0 and higher and locks a selected app to the display.
Guided Access mode limits your iPad to running one app at a time.
Parental controls on the Kindle Fire restrict access to certain apps, including the Amazon app store. To lock the Kindle Fire down further, 3rd-party apps offer additional controls.