Back button to leave application

Hello,
we use a monitoring application for our tablets that allows us to lock access to a selection of applications. When this mode is activated, the logical buttons of the operating system disappear, leaving only the back button accessible. We would like this button to close the application. Many applications close when the back button is pressed twice. Would it be possible to consider this possibility soon? Thank you very much.

International Society of Explosives Engineers?!
Wow, and welcome to the club!

The application is called __________ version ______ produced by __________.

Have you contacted the manufacturer of the application that disables the system provided functions on which the Survey Solutions Interviewer App relies? Have they provided any recommendation or a workaround?