Woman's Diary is a free Android app developed by appilicious that helps women manage their physical health. With over 4,000,000 downloads, this app is known for providing a cute and pleasant way for women to manage their health. The app offers a range of features, including the ability to predict the timing of your period, track your period with memos, and choose from a variety of calendars. One of the most useful features is the "maternity" function, which provides support for women during pregnancy both mentally and physically. The app also allows you to record your basal temperature, weight, and body fat percentage, and provides backup services to save your data. Overall, Woman's Diary is a well-designed app that offers a convenient and straightforward way for women to manage their health.