I can't figure out what made you decide to post this to HN. The author of this app has obviously been having a great time. Why the sour grapes? What are you so mad about?
Not mad at all, just describing what it is a common occurrence with these type of tools, you (well, not you) can take the criticism in the right way and change things to gain more users(which I suppose is the goal here) or you can get defensive and artificially place extra beliefs on the other person to assuage your discomfort. Life is always about choices.