This is all very true, unfortunately. Google designed Android as a an OS for internet appliances. They're not interested in local-only apps working on local files.

But I think the OP is to be complimented for what they've built and their intention in making it local-only. I've long felt that apps that *genuinely" respect privacy are one of the few areas of opportunity still left in the mobile space. I wish there were more develpers building things like this.