I use Hacki mobile app mostly: it marks what I saw already, lets me favourite, upvote, reply, browse by top/best/ask and so on. It's easier to navigate large posts (many comments).

Then I still come back to best/top/favs at work because there is always something cool I missed or a "show HN" that has a project I'd like to test.

Mobile app helps to keep it tidy and HN has plenty of content easy to consume like that l.

Hacki is on fdroid.