Mobile Technologies, Applications and Software Design Belly Preg Mobile Application by Ekaterina Pine Belly Preg is an application that tracks the physical change of a pregnant woman and monitors all stages of development of a baby. It contains relevant information from various specialists and allows users to understand the size of a baby by comparing it to visual objects. The application includes checklists for all pregnancy periods, as well as tools for monitoring weight, blood pressure, water intake, kicks, and contractions calculator.