I like http://hn.premii.com because it runs articles through the Instapaper API so you don't have to leave the site to read an article. It's also vastly faster than any of the above.
iOS: https://itunes.apple.com/us/app/hacker-news-yc/id713733435
Android: https://play.google.com/store/apps/details?id=com.premii.hn