User blog comment:FreddieSeddieI'mReady/Why Sam would not be happy if Seddie broke up and Creddie happened/@comment-1976613-20110821135604/@comment-4196911-20110821182250

The Mood App is unrealistic in the real world, but it plays by the rules of the Schneiderverse. In the sense that it is more of an independent confirmation of someone's feelings than a character like Carly who just throws the word around. It was there for the purpose of not only showing the audience that Sam was actually in love, but showing the other characters the same thing so that Freddie wouldn't think Sam was pranking him or messing with him when she unexpectedly kissed him.

It was basically a way for Dan to get some real feelings out into the open from a character who almost never tells you what she's really thinking.