Kitab Ushul dan Qowaid Fiqih is an Android application developed by Islamic Institute, available for free in the Education & Reference category. The program is a translation of the book "Mabadi 'Awwaliyyah" by Sheikh Abdul Hamid Hakim, which deals with the principles of Islamic Jurisprudence and Fiqhiyyah rules. It is the foundation of the Shafi'i Madhhab and contains 40 Fiqhiyyah rules that serve as the basis for determining Islamic laws according to the Shafi'i Madhhab.

The app is designed to make the book more accessible and easily understood by all Muslims, especially students and scholars of Islamic studies. It includes a detailed introduction by the translator, followed by an in-depth discussion of Ushul Fiqh and Fiqhiyyah rules. The app is a must-have for anyone who wishes to gain a deeper understanding of Islamic Jurisprudence.