Your app looks promising, I quite like the look and feel.

There are some low hanging UX improvements you could work on next: tapping on a story in the feed shows options to go to the comments or to the article, and I wish this could be done with a single tap.

Similarly, when reading comment threads it’s a bit annoying having to open replies one by one. For me, the best threaded discussion reader on iOS is Apollo which shows quite a few replies and goes more than 6 levels deep with indentation without having to tap anywhere.

I can already tell you that the default font size is going to be divisive, especially for readers of HN ;)

I’ll keep this app around and check the change logs to see if it could replace Octal, which I’m using now