I just released the latest update which adds split-screen support to Android Nougat (or higher) devices. Sorry for the delay on this feature but the built-in support for selecting layouts (and font-sizes) works well for some parameters but not for aspect-ratio.
Anyhow, there are three keyboards (portrait, landscape and square). Square was previously only for tablets but split-screen changes that. The system will automatically pick the best keyboard and screen height for the size it is given and every device is a bit different. I did my best to unify the three keyboards while changing as little as possible.
A few side effects of adding split-screen is that now the free version gets landscape support. The two features are not mutually exclusive. Also, all orientations now get a scrolling display and all orientations for the programmer-mode will now get the binary-bit display.