Great job! Definitely can't beat the price point :)

Feedback: 1. Put search in the main article list instead of in the left panel. Perhaps either a hidden search field that you expose by dragging down (like iOS mail client) or a search button that exposes the field.

2. The left panel looks like a junk drawer of icons. They could stand to be organized a bit since I don't see things like Support and history as peers to the categories.

Overall great work. I like the automatic loading as you scroll down.