Hacker News is a miserable experience on mobile. Even on desktop, the upvote/downvote buttons are needlessly small and give no confirmation; I often find myself clicking "unvote" because I wasn't sure if I upvoted or downvoted.
Don’t forget how Code snippets require lots of horizontal scrolling on mobile. It’s bad but understandable when it’s actual code, but it’s just aweful when someone is using code formatting to represent a quote.
The materialistic hn app is what I've been using for a while (and right now, actually). But i also saw several other readers for the site. Worth looking into one of them if you look at posts on the go a lot.