Right, after playing through a whole song on the web, my first reaction when I saw that there was an app version available was: Oh, that's brilliant, the web app (which I thought was the end of the story) is actually an interactive demo for a paid app. So I was surprised to see that the app itself was free -- but perhaps this is the first time the web version has gotten any traction, so the developer was unprepared for customers with this set of expectations.
