Ladi Cal is a free Android app developed by Yoshinosuke Nagaya. It is designed to help women manage their physical condition by recording various symptoms and basal body temperature. The app allows users to input and display basal body temperature, body weight, and body fat percentage. It also provides a record of various physical conditions such as ovulation communication and textile during menstruation.

The app displays basal body temperature on a graph and calendar, making it easy for users to understand low and high-temperature phases. Body weight and body fat percentage can also be displayed on the same graph. Additionally, Ladi Cal calculates the average value of the cycle from the recording state of menses in the past and displays the physiological predicted day-ovulation prediction date on the graph and calendar.

Other features of the app include the ability to display the number of weeks of pregnancy at the time and to customize the icon.