Health care assistant for you and your family. Biorhythms Guide is dialog based application, which calculates dates of so called "days of tiredness" after Kotelnic's method for any period. This enables one to predict dates of vital power decrease and to prevent or at least to minimize undesirable consequences of such fall of organism possibilities. The program has easy wizard and short but complete help, which includes biorhythms fundamentals overview the calculations is based on.