Some if the controls like the actions to edit or delete and not visible on the iPad and can only be used with funny workarounds. I think there is not need for a native app. It's even better and more efficient to invest more time into making it really touch enabled and really responsive
Thank you for your idea. The status of this idea was out of date. Since this request was made we have created the Aha! mobile app for iOS and Android. You can learn more about Aha! mobile here.
The kanban board cannot be scrolled because the touch picks up a tile and drags it. Very annoying! Also, many of the little Xs for closing dialogs are virtually impossible to tap.