I need a very basic operating system.
So basic that you can take any open source operating system and modify it to my needs.
What I need is that the system only starts and has 1 single app of mine.
I don't want it to have a play store, to have a browser, to have nothing.
The only thing I want to work on that operating system is my application.
Since my interest is that these cell phones cannot be used for anything different.
That has my logo at the beginning of the session and as soon as I open it, only the icon of my application is shown.