Hisnul Muslim Français Arabe is an Android application developed by Ousmane Abdoulaye, providing users with a free Islamic reference guide in both French and Arabic languages. This app serves as a digital version of the well-known book "La Citadelle du Musulman", also known as "The Fortress of the Muslim".

The app features a user-friendly interface with a simple design, making it easy to navigate. It provides a comprehensive collection of supplications, prayers, and duas that a Muslim may need on a daily basis. The app is divided into different categories, such as Morning and Evening duas, duas for specific occasions, and other important prayers. The app also provides audio recitations of the duas, making it easier for users to learn and recite them correctly.