المغني لابن قدامة (Al-Mughni) is one of the biggest Islamic jurisprudence reference books available. It was written by Mawaffaq al-Din Abu Muhammad Abdullah ibn Ahmad ibn Muhammad ibn Qudamah al-Maqdisi al-Jam'iili al-Dimashqi al-Salafi, who was born in 541 AH and died in 620 AH. The book is a repository of Hanbali jurisprudence and is considered an essential reference work for Islamic scholars and students of Islamic law.

The book covers a wide range of topics related to Islamic jurisprudence, including acts of worship, transactions, marriage and divorce, inheritance, and criminal law. It is available for free on the Android platform and is published by marqoom.org, making it easily accessible to anyone interested in deepening their knowledge of Islamic law. The app is easy to navigate, and the content is well-organized, making it a valuable resource for anyone studying or practicing Islamic law.