Not an app, but I think it’s better than almost all of the apps out there. Clean, quick, and has an “open in new tab” feature.
Rather than writing my own description, here’s the pitch in the site’s own words:
> Hacker News is a great resource. However, I seemed to constantly run into two issues. 1. If I didn't visit at least once a day, top items would scroll off the top pages and I would never see them. 2. If I was procrastinating and visiting the page often, I would find it difficult to determine what was new on the page. That frustration led to hckr news, a chronologic list of items that have made it onto the Hacker News homepage.
(https://hckrnews.com/about.html)
I think apps don’t have much to offer since HN has thread collapse and vote-undo these days.