Счастье в Исламе (Happiness in Islam) is a free Android application developed by IslamBooks under the category of Education & Reference. The app is an e-book that contains a valuable message about living a happy life. It is authored by 'Abd ar-Rahman as-Sa'di, and the commentary is given by Salihah as-Suhaymi.

The e-book provides useful rules and guidelines that can help people lead a happy and fulfilling life in accordance with Islamic principles. The content is based on the teachings of the Quran and the Hadith, and it is presented in a clear and concise manner. The app is easy to navigate, and the text is easy to read.

Overall, Счастье в Исламе is a great resource for anyone who wants to learn more about living a happy life according to Islamic teachings. It is a must-read for all Muslims who want to improve their lives and find true happiness.