A free app for Android, by Mwanje.

Period Calendar – The Home Screen Ovulation Tracker helps women trying to get pregnant. It can also be used by women who just want to get a regular period.

Home Screen

Period Calendar tracks all the phases of your menstrual cycle. It’s also useful for women who want to get pregnant. The user-friendly interface makes it easy to track the phases of your menstrual cycle.

Ovulation Tracker

Keep track of your ovulation phase and know the day you’re most fertile. Period Calendar is useful for women who are trying to get pregnant.

Periods, Cycles, Ovulation & Conception

Keep track of your menstrual cycle, and know the day you’re most fertile.