Good pitch detection, UI problems
The pitch detection works very well and the general concept is fine. It has two UI flaws, though. The icons are hard to click, especially the cross. Clicking it often shows some system icons or moves the cursor. The second problem occurs during playing: the diagram starts to scroll when the cursor is almost at the right edge of the screen, so you see the pitch only a second or so before it is played. But I give 5 stars as it is the only actually robust app of this type I know about.
