At last, universial app is out there.
New version(1.2.0) has a lot of internal changes.
1)iPad support(with retina display): new SplitView interface.
2)Article view improvements: page load faster, article footer section redesigned.
3)many other things: folder counting simplified and became customizable. article summary is shown in list view.
*It is strongly recommended iOS 5.1 or later for iPad. Because SplitView is much better after that version.