File:Vintage Biomate Handheld Biorhythm Calculator, Certified by the Japan Biorhythm Association, Circa 1970s (11574465133).jpg - Wikipedia
Biorhythm Calculator for Android - Download | Bazaar
Free and Easy Biorhythm Calculator 3.02 - Informaticien.be
Biorhythms Calculator Portable Download: Lightweight program which enables you to calculate your daily biorhythm, as well as view your best and worst days, and compatibility with others