It's been talked about multiple times, but I don't think anything has come from it. Supposedly the site admin has been working on a backend rewrite of the website, hopefully with an API we can use. Until then, I doubt an app will ever happen.
I gave it a shot a year or two back. It was basically just an android app wrapper for the website, where the HTML was ripped and parsed to be used in a native android UI. Displaying the website was (almost) functional, but I never got it to properly send data back.