By posting in Ask HN, I'll assume community discussion is important to you. So I'd recommend my app, Pivit. Besides having a great threading system (with ability to copy), it was designed for iOS 7 and utilizes:
・Dynamic Type
・Content deference
・Background Fetch
It has a one-of-a kind article indicator for both posts you've read and ones you've decided not to read, and support for opening in Safari and saving to your Reading List.
・Dynamic Type
・Content deference
・Background Fetch
It has a one-of-a kind article indicator for both posts you've read and ones you've decided not to read, and support for opening in Safari and saving to your Reading List.
I also didn't overdo the HN orange.
Pivit — http://appsto.re/i6xC4GD