This thesis deals with the improvement of a mobile application intended for pregnant women, with the aim of improving the user experience and increasing the usefulness of the application. The existing version of the application was analysed, where key shortcomings in design, functionality and available content were identified. Based on this analysis, a new version of the application was created with an emphasis on an intuitive user interface and richer, more relevant content that meets the needs of pregnant women. The new version of the app brings a number of improvements, including better organized information, chat counseling (collaboration with gynecologists and psychologists), advice on the best baby products (after the baby is born), exercises for pregnant women, postpartum support (postpartum depression), all what pregnant women need for the maternity ward, etc. In addition, the application has been redesigned to be more visually appealing and easier to use, with the addition of new functionalities that include educational articles, interviews with pregnant women and various tips related to mother and baby care. The goal of this work is to improve the mobile application in such a way as to be a reliable source of information and support for pregnant women, while providing a better and more intuitive user experience. The results of this research indicate significant potential for improving the applications themselves, which can contribute to better care for pregnant women and new mothers.