I use an app for HN, and try to wherever I can due to my general experience with web things, so it's a different feel. But also HN being snappy is pretty much an upfront expectation given it's like 99.99% text.
Yep, several. I've found Hacki best for me so far, but actually I'm considering to make my own as there are a few pain points and extras I'd like handled, and it'd be a nice learning experience.