I know you have tried to come up with a way to make an android build for book 2 & 3 in the past. I dont know if you were aware or not but a couple of the people doing android ports now seem to be capable of porting large PC ren'py games to android. Wills747 was I think the first and currently has a large build of the game Sweet Affection for download on their discord channel. Might be worth having a word to get more details of how they did it.