Some commenters here are totally missing the purpose of the "Show HN" section!
The main point of adding top-level comments to posts of this type is to provide feedback, or more precisely, constructive criticism. This allows the poster to see his product/project/app/site through others' eyes, which greatly helps him improve the product and discover bugs that are not visible at development time.
Having comments such as "nice", "good work" or "great app" does not help the developer, in any way, improve the app or see it from another angle (The Mom Test).
Also, reading comments that say, "I use the X app instead; it is better, and..." is killing me! Yes, personally, I use Materialistic, Harmonic, and Gilder for Android, and I use HACK and Octal for iPhone, but mentioning them here doesn't add any value except if you propose a killer feature that they already have and you'd like the developer to implement.
Anyways, I always salute, encourage, and upvote side projects like this that are related to HackerNews and below are a few critics that might help the developer make the app better:
The biggest missing feature here that is already supported in all the other apps I've been using is the in-app browser and the comments' section. Clicking on any story would trigger the external default browser to view the page. Also, trying to access the comments would take you to "https://news.ycombinator.com/item?id=xyz" which ruins the user experience.
The app is missing the "Show HN" and "Ask HN" sections, just to name a few.
At any given time, I cannot tell what theme the app is already in because the *themes* list does not have the currently applied theme *highlighted*.
Since you've already built some widgets, it would be of great value if you could build another *profile* widget where users can see their *karma* being updated regularly without having to open the app or access the HN website.
That was my two cents.
Good work so far, especially the "widgets" part. I wish you the best of luck.
I apologize to other commenters if I've been rude. For me, that was.. "something needs to be said".
Peace!