The Book of Islamic Jurisprudence Rules for the Four Schools is an Android application developed by So Smart Apps. The application is available for free in the Education & Reference category under the Books subcategory. The book is written by Dr. Mohamed Mustafa Al-Zuhayli and sourced from the Golden Comprehensive Library.

The program has many features that make it easy to use and navigate, such as a comprehensive search function that allows users to search the entire book or specific chapters. It also offers different font types and colors, with the ability to change the background color and use images as backgrounds. Users can easily access a list of the main sections and chapters of the book, as well as a favorite section where they can save their favorite books and chapters. Additionally, users can take notes and add their own thoughts and reflections for each chapter. The program also includes a timer that allows users to set a time limit for reading and an automatic scroll feature. The app supports ten different languages and allows users to share and copy any part of the book.