I've tried a half dozen and found MiniHack to be the best.<p><a href="https://itunes.apple.com/us/app/minihack-for-hacker-news/id631108846?mt=8" rel="nofollow">https://itunes.apple.com/us/app/minihack-for-hacker-news/id6...</a>
I've used "Hacker News (YC)" in the past but I switched to MiniHack and I found it to be faster. It supports a lot of sharing and bookmarking services and has some nice gestures for browsing through the comments.
This is the best I have found.<p><a href="https://itunes.apple.com/us/app/hacker-news-yc/id713733435" rel="nofollow">https://itunes.apple.com/us/app/hacker-news-yc/id713733435</a>