Nhật Ký Eva is a dedicated app for women, designed to help them easily track their menstrual cycles. With this app, women can effortlessly monitor their menstrual cycle in the most convenient way.

The app offers several features, including tracking menstrual cycles, notifying upcoming cycles, indicating ovulation days, predicting fertile and safe days for conception, displaying the probability of the baby's gender based on conception date (if pregnant), and providing various health utilities tailored for women.

Nhật Ký Eva aims to empower women to take control of their reproductive health and well-being, ensuring a happier and healthier lifestyle.