I used your app in the past. I love the design; my only gripe (and what ultimately caused me to uninstall) was being unable to sign into my HN account. Other than that, great job with it.
The official API doesn't support logging in sadly yet. When it does I'll add that functionality immediately.
FWIW I think Boreal is the greatest ios app for HN. It has great features like filters and comment collapsing. Also allows commenting, voting and publishing.