I am the developer of HACK (available on iOS, Android and MacOS) which allows commenting, upvoting, downvoting, favoriting, submitting new posts and also supports push notifications for replies. It is the top Hacker News client in the App Store.
https://apps.apple.com/ca/app/hack-for-hacker-news-developer...
Writing this reply with HACK, thanks for the app! If you are comfortable with it, could you share rough revenue estimate for the app of such popularity? How do you approach promoting such a specific app?
E.g. I use Hackers [1][2] because it is much easier to read stories on mobile and supports dark mode. Unfortunately, it doesn't support commenting or downvoting (yet?)
[1] https://apps.apple.com/us/app/hackers-for-hacker-news/id6035... [2] https://github.com/weiran/Hackers