want an edge on tomorrow? i've been using biorhythms for years with other silly future seeing stuff like tarot and astrology. biorhythms works best of all of them and this calculator is the easiest to read and set up on android (just punch in your birthday and rock on). i recently started using this calculator in conjunction with my workout routine. off on double red days. light workout on red and green days. heavy workout on double green days. it really works. other stuff i use it for is selecting my tea flavor of the day. lapsang souchong for double red days. chai for red and green days. earl grey for double green days. it works, the best way to live your life is to be in control of your soul, just need a couple of tools to get there, this is a very good one.