A biorhythm calculator attempts to predict various aspects of the user's life through simple mathematical cycles. Scientists believe the test has no more predictive power than chance.
The biorhythm calculator reads the level of capacity performance. The levels it reads are mental, physical and intellectual. The biorhythm calculator also claims to read spiritual, awareness, aesthetic and intuition levels. The info that needs to be given for the test to be administered is the birthday of the test-taker and the date the test is being taken. Studies on certain life rhythms or cycles, which were later called biorhythm, began in the 19th century.