There are several apps in the appstore-- I have four of them myself, and a couple of them allow comments and points. The one I use most often is the one by Mic

There are several apps in the appstore-- I have four of them myself, and a couple of them allow comments and points. The one I use most often is the one by Michael Grinich, but YMMV. The trick is to search for Hacker News (with the space in between the words).