Why do you get so upset and angry some days? Let Biorhythm Meter help you. It is an application based on the theory of Biorhythms.
Biorhythm is an attempt to predict various aspects of a persons life through simple mathematical cycles.Most biorhythm models use three cycles: a 23-day "physical" cycle, a 28-day "emotional" cycle, and a 33-day "intellectual" cycle. ( wikipedia)