The "Fortress of the Muslim" app compiles Adhkar from the Book and Sunnah based on the book "Fortress of the Muslim" by Dr. Said bin Ali bin Wahf Al-Qahtani. It includes essential supplications and prayers for daily life and interactions with others, presented in an easy and straightforward manner. The app also features the book "Ruqyah Shar'iyyah" by Dr. Khaled bin Abdul Rahman bin Ali Al-Juraisi, providing audio recitations without the need for an internet connection. Additionally, it offers excerpts from the Forty Hadith collection, selected Quranic chapters such as Surah Al-Kahf, Surah Yasin, Surah Al-Mulk, and a digital tasbeeh for counting.

The app has been enhanced with various features for easy access to Adhkar, including a complete index of the "Fortress of the Muslim" book, categorized Adhkar for easy browsing, proper diacritics on all supplications, the ability to add frequently recited Adhkar to a favorites list, combined search functionality for Adhkar and indexes, adjustable font size, reminder alerts for Adhkar, customizable fonts and app interface, support for non-Arabic devices, night mode, infinite tasbeeh, and multiple color themes. Users can also share Hadith and supplications on social media platforms.