Simon Halvdansson runs "Harmonic", an Android client for Hacker News, I am using it daily for 2+ years and I sincerely recommend it.
I even asked him a feature (mark a story as read), and he implemented it shortly after.
Shout-out to you Simon!
https://github.com/SimonHalvdansson/Harmonic-HN
https://play.google.com/store/apps/details?id=com.simon.harm...