Automatically loads new articles
New articles are automatically loaded if you scrolled down far enough on the "Top Stories" list
Keyboard shortcuts
You can easily navigate the app using Vim like keyboard shortcuts, there's a complete list here or just press h in the app
Website / comment split screen
You can view website and comments next to each other or cycle through the different display modes using the shortcut l
Readability included
Some websites have a terrible reading experience but you can use Readability inside the app to fix that
Awesome comment navigation
You can navigate the comments using keyboard shortcuts and fold them which makes a great comment reading experience
PDF support
Reading PDFs inside the app is no problem, it's automatically detected when to display a PDF reader
Read stories are remembered
Read stories are marked as such, just like in the browser
Polls
Things that other HN apps usually forget are included, e.g. viewing HN polls right inside the app
It's Open Source!
It's open source and on GitHub, you can contribute to it or just change it however you like :)