A free app for Android, by Arbor Ltd.

This is a handy tool to help you keep track of your periods and ovulation. The app is highly customizable, and you can even add additional notes.

The app is integrated with the calendar to help you predict when your next period will start. It is also capable of calculating when the best time to conceive a baby will be. The app can even remind you to take a birth control pill when you get pregnant.

The app is a very simple and convenient tool. You can record your period, ovulation, and fertility days in a very simple and easy-to-use manner. You can also add additional notes to each record. You can even add an intimate diary that will allow you to write about your feelings and thoughts.