Fortress of the Muslim in English. Made based on the book "Fortress of the Muslim", author: Said Bin Ali Bin Vahf Al-Qahtani, also separately added 49 Dua from the Quran. Ability to listen to Dua. Ability to add a Dua or a chapter to the "Favorites". Ability to share, separate Dua. Ability to change the size, color, type of fonts. Search. Without advertising. Night mode.