A free program for Android, by Amila.

Period Calendar – Menstrual Cycle Tracker is a free-to-download, user-friendly, and easy-to-use app that can help you track your periods, cycle length, and other fertility days. It can also be used as a convenient calendar to plan for future events.

The application can be used by women, girls, and women who are interested in their periods and fertility. It is also recommended for use by health care professionals, such as doctors, nurses, and midwives.

The application can be used by individuals who are trying to get pregnant or are trying to prevent pregnancy. It can also be used by individuals who are planning for a baby, or who are trying to get their menstrual cycle synchronized with their partner.