My Menstrual Diary is a lifestyle app designed for Android phones that helps you monitor your menstrual cycle. With over 3,000,000 downloads worldwide, this app is simple, easy to use yet comprehensive. It allows you to record your periods in the calendar, including the flow intensity, and highlights your next period based on the average interval of the last three periods.

In addition, it calculates the day of ovulation and your fertile period for each month, providing valuable information to take necessary action. The app also features a history window that displays all previous periods, duration, and interval. Moreover, there is a Personal Notes window for you to write your health notes.

This update includes the option to switch off determining the ovulation date and the fertile period if you do not require this. The app is password protected, and you can set alerts to remind you of your next period and the fertile period.

Please note that this app assumes your periods are fairly regular, and the date of your next period and the fertile period may not be accurate if you have very irregular periods. Overall, My Menstrual Diary is a very useful app. to monitor your periods, providing valuable information to plan your activities better. However, it is not a substitute for professional medical advice.