I'm interested in this, just a few questions though (some of them might be dumb). I'm not sure what you mean by "add-on", but based on the pictures, I can see that it is a different app from Ren'Py itself.
Also, I'm more interested in the "phone" being the whole game presented and not with the usual Ren'Py HUD. Does this tool automatically make it with that "phone" in focus?Last and probably the dumbest question, are you planning tweaking the tool to support design changes to the phone (ex. adding a BG to the "phone", etc.)
Thanks so much!