Period Tracker - Period Tracker, the easiest way to track your periods!
Eve by Glow - A savvy sex & health app for women
Periodic Calendar - What is Periodic Calendar?
Cycle - (taken from the man pages) DESCRIPTION
Periodical - This application calculates the fertile days according to Knaus-Ogino.
LoveCycles - LoveCycles is an easy and fun to use period tracker (menstrual cycle calendar).