Wassilatu a chaafi is a mobile application inspired by a prayer book Wasa'il al-Wusul ila Shama'il al-Rasul written by Ismail bin Yusuf Muhammad an-Nabhani (1849–1932)
This book is often used in Arab and East African countries
The audio version was made by Muhammad Mughni (Kariu al kouraan and religious poet of Comorian nationality) and Sheikh Hassan Juma.