The “Fortress of the Muslim of Remembrances from the Qur’an and Sunnah” application contains the text of the famous book by Sheikh Saeed bin Ali bin Wahf Al-Qahtani, which is considered one of the most prominent books in the field of remembrances and supplications derived from the Holy Qur’an and the Sunnah of the Prophet. The application aims to make it easier to read and understand this valuable book by offering advanced technical features. The application includes an index that facilitates navigation between different sections and chapters, in addition to an advanced navigation system that enables the user to move smoothly between pages. It also contains a feature to save bookmarks for quick reference to favorite places, and a zoom in and out feature to provide a comfortable and convenient reading experience.