The application of “Qatar al-Nada in the systems of Qatar al-Nada” by the scholar Saeed bin Muhammad al-Budaywi al-Marri provides a valuable reference for students of grammar, as it is considered an educational system in which the author based the book “Qatar al-Nada and Bel al-Sada” by Ibn Hisham, which is one of the most famous books in the science of grammar. This application allows users to benefit from this outstanding work through an easy-to-use interface and advanced features. The application contains a table of contents that facilitates navigation between different chapters and sections, enabling the user to access the required information quickly and easily. In addition, the app has a bookmark feature to save important pages for later reference, as well as a text zoom feature to provide a comfortable reading experience. Users can also switch between day and night mode for eye comfort while reading in different lighting conditions. This application is an ideal tool for those wishing to deepen their knowledge of Arabic grammar rules in an organized and easy way.