Going to reply to myself as it's too long so I can't edit: Installed Termux and the API package and widget, and the API package (paid) has me tremendously excited. Not because it's all that advanced, but between the ability to open quick little dialog boxes to collect text, and the widgets ability to spawn them from a button, it just looks amazingly useful to automate quick little tasks without going down the particularly hellish route that is full app development for mobile...