The “Four Rules” application by Sheikh Muhammad bin Abdul Wahhab bin Suleiman Al Tamimi provides a distinctive educational tool for everyone who wishes to understand the Islamic faith in a simplified and direct manner. The book explains the basic rules of the monotheism of God and explains the difference between monotheism and polytheism in a way that is easy for everyone to understand. The application provides modern features that help take full advantage of the text, such as the table of contents that allows easy navigation between different chapters and sections, in addition to the bookmark feature to save important pages for later reference. The application also features the feature of zooming in and out of text to provide a comfortable reading experience that suits the needs of different users. The app also supports day and night mode to ensure eye comfort while reading in different lighting conditions. In addition, the application has an audio text listening feature, which gives users a unique learning experience by listening to the audio content of the text. This application is an ideal companion for everyone who seeks to deepen their knowledge of monotheism and understand the Islamic faith in an organized and comprehensive way.