You will need:
The functionality needed for these installation steps, "QR provisioning", is part of Android 7, however there are devices on which it doesn't work.
There is some limited information about availability of QR provisioning on specific devices:
Please let me know what device you use if you succeed or fail so that I can compile a list of supported devices.
The device needs to be cleared to its factory state so that Homer Player can be installed as a priviliged app. This will allow it to activate the full kiosk mode.
Factory reset deletes all contacts, photos, music and other data from
the device.
Make sure you copy all the important data to other devices before proceeding.
When the factory reset process finishes you are presented with the device "Welcome" screen.
If tapping the "Welcome" screen doesn't have any effect it is likely your
device doesn't support "QR provisioning".
Please e-mail me, I may be able to help.
Now you can enable and disable the full kiosk mode at will.