الفقه على المذاهب الأربعة (Islamic Jurisprudence on Four Schools of Thought) is an educational and reference application developed by So Smart Apps for Android devices. The app provides a comprehensive guide to Islamic jurisprudence, authored by Abdul Rahman bin Mohammed Awad Al-Jaziri and published by Dar Al-Kotob Al-Ilmiyah in Beirut, Lebanon. The source of the book is Al-Shamila Al-Dhahabiya, a digital library of Islamic books.

The app offers an advanced search feature, allowing users to search the entire book or specific sub-sections. Users can customize the font size, color, and style of the text, with eight Arabic font options available. The app also offers hundreds of background and theme colors for comfortable reading. Users can easily navigate the book with lists of main sections, individual chapters, and a favorites section. The app also has a notes section for users to write and edit their notes, and a timer feature to set reading time. The app is available in ten different languages.