Tafsir Jalalain 30 Juzz is a free Android application developed by Az Zikr Studio, falling under the Education & Reference category. It is a comprehensive tafsir (interpretation) of the Quran that has been widely used in Islamic education for centuries. The application includes syarah penjelasan (explanatory notes) to help users better understand the Quranic verses.

The app features an easy-to-understand language style and literature that aligns with the language used in Islamic schools. It is a light-weight application (around 7MB) that can be used offline without an internet connection. Users can also customize the background color according to their preference and quickly access the chapter titles from the right-hand side.