1st Biorhythm is a powerful and easy-to-use tool that allows you to calculate your biorhythm cycles so you can plan your activities to achieve maximum efficiency and be prepared for the next bad day before it comes.

Using 1st Biorhythm you will find out a person's physical, emotional and intellectual stability at any moment of time. Also 1st Biorhythm will provide you with the interpretation of the current biorhythm state and many other reports including person compatibility and double critical days.

On top of that you can even embed all charts and reports into Microsoft Office® documents or send via e-mail. If you´re at all interested in learning what will happen to you or your compatibility with others then this is the tool for you.