Hackerflow
I'm working on a feature rich native Hacker News app. I tried out all HN Reader on the App Store but sadly they either have to few useful features, bad UI or both so I decided to build one myself. Currenlty I have an Android version in the Play Store and I am working on an the iOS verison. Aside form an improved UI the app has a history so that you never loose a story and advanced bookmarking for saving stories and comments into custom folders. It is still ruff arround the edges, for example I shipped it with login for upvoting stories and writing comments but the feature broke some time ago and I didnt have time to fix it yet, especially that I noticed most users don't even log in in the first place. If you have an Android phone and love hacker news give it a Try: https://play.google.com/store/apps/details?id=app.hackerflow