|Date||Aug. 12th 2011|
TornadoGuard is the 937th xkcd comic.
The app is supposed to warn the user about tornado's. People are rating the app highly because it looks good and has a good usability. However, one person rates the app very badly because it did not in fact warn him about a tornado. Due to the other good ratings, the overall rating of the app is still high even though it does not do what it is meant to do.
The irony herein lies that a lot of apps have a good rating because they look good and have a good usability, even though they do not work as they should.
"The bug report was marked 'could not reproduce'."