It will be great to support iOS. I've ended up buying apps that allows writing and running code on iPad and they are not even close to what this site does. Also, if you can support C# and Python, you would have covered a lot of ground.
Quick feedback: when you change the filtering on the left hand nav, you scroll to the top of the page. I really don't need to see the huge masthead (on my small Macbook Air, in Chrome, the masthead is over 2/3 of my vertical screen) again on every click. Just scroll to the top of the list/filter section, not the top of the page.
