I'd eventually like to make a JoiPlay / Android guide for the wiki, so if anyone figures out the ideal method I'd be happy to put it up.I ended up running it on something ”AWebServer” seemed to fix the saving. The issue was that JoiPlay couldn't access the save folder, as for fixing the cache I have no clue how to do that, I thought JoiPlay ran locally. It's not your problem, but I would like to find the culprit for the future.