Not completely sure. Reddit for example has a few really good ones. Alien Blue for iOS and Reddit Is Fun for Android are the ones that come to mind. Might be th

Not completely sure. Reddit for example has a few really good ones. Alien Blue for iOS and Reddit Is Fun for Android are the ones that come to mind. Might be that the HN community is too small with a comparatively low opportunity for real growth. It's big, but not compared to something like Reddit. To put in the work building and maintaining a product good enough to actually use, you'd want the developer to be making enough money such that he/she would be able/willing to support it. And that may be difficult with a community like HN.