Kitab Al Jurumiyah, written by Al-Imam Ash Shanhajy, is a fundamental and highly regarded book in Indonesia. It is an excellent resource for those interested in learning Nahwu science as it covers almost its entire core.

The app also features various Kalam. Here, you can learn the key components of Arabic sentences. The drafting of a sentence in Arabic is threefold, consisting of Isim, fil'il, and letters that have meaning.

There are many other topics covered in this app. These include khobar, na'at, athaf, tawkid, badal, masdar, laa, munada, ficil, mubtada', istisna, and many more.

It is a comprehensive app for those interested in learning the Arabic grammar.