Ovulation Calendar Fertility, developed by Arbor Ltd, is a free lifestyle app for Android that helps women track their reproductive health and increase their chances of getting pregnant. This app uses the Sympto-Thermal Method (STM) to predict peak fertility days by analyzing the basal body temperature (BBT) record, cervical mucus (CM), and period on the calendar.

The app offers a range of features, including a monthly calendar that tells you your daily chance of getting pregnant and your peak fertility days, the ability to track your cervical mucus, temperature, weight, intercourse, mood, symptoms, and PMS, and the option to record your ovulation and pregnancy tests. Innovative charts help you manage your reproductive health and get pregnant, and you can access hundreds of articles and tips about pregnancy, fertility, ovulation, menstruation, reproductive health, and more.

Moreover, Ovulation Calendar Fertility allows you to export your data to your doctor, view all your data on the calendar, and even backup and restore your data. It also comes with password protection to ensure your privacy. This app is 100% free and there are no locked features. Overall, Ovulation Calendar Fertility is the best tool to track your reproductive health and get pregnant fast.