Boy or Girl is a pregnancy companion application designed to support women throughout their pregnancy journey. The app provides a range of tools for tracking and managing pregnancy health, including an ovulation calendar, a weekly pregnancy follow-up, and a daily diet planner tailored to each trimester. It also offers a gender prediction feature referred to as the XY Method, alongside a baby name guide that includes meanings and origins. Users can create personalized baby shower invitations and maintain a medical history log within the app. The application includes access to online consultations with specialists such as gynecologists and psychologists, as well as a support community where users can connect with other mothers and share experiences. Additionally, the app features a donation platform that allows users to give or receive baby items, and a gift registry. Planned additions include a voice tool called Magic Voice. The app offers a 100 percent refund within the first seven days if expectations are not met. Typical use cases involve tracking ovulation for conception, monitoring pregnancy development week by week, receiving dietary recommendations, and scheduling virtual appointments with healthcare professionals. Users can also engage with the community for emotional support and practical advice. The app is mobile-based and designed for ongoing accompaniment throughout pregnancy and early motherhood.