Dislike the UI. Rolodex too slippery and slow.

I know a lot of reviews have been written about how polished this User Interface is. But can I offer a dissenting opinion here?

I really, really cant stand the UI. Well, the layout is fine, but the rolodex selector is too finicky. When Im out and I need to switch measurements and units, I would often have to fiddle with it slowly just to get the right one selected. It feels really "slippery".

I have never used Convertbot (though I have used Weightbot which was nice) But judging by their screenshot they use a circular selector, so that may be a better solution.

AN20151005 about Convert ~ the unit calculator, v1.0.1