Any specific app you would recommend?
https://apps.apple.com/us/app/octal-for-hacker-news/id130888...
There's an Android version as well: https://play.google.com/store/apps/details?id=com.pranapps.h...
It's the most featureful FOSS Android app for HN, it's UI is a breeze to navigate too (if you enable swipe gestures from the tiny settings!).
Love the browser concept in it though, never seen anything like it before.