Quran By Subject is an Android application developed by El Motaheda Web, which categorizes the Arabic ayas or verses of the Holy Quran by subject. This educational app includes more than one hundred subjects, covering all the stories of the prophets in the Quran, as well as useful subjects such as creation of man and universe, Satan, prayers or Duaa, nature of man, description of heaven and hell, laws of Islam, Angels, and God's names and attributes he describes himself with.

The app is open-source and is also available as a PHP script that can be run on your own server for free. With Quran By Subject, users can easily search for and locate Quranic verses based on the subject they are interested in, making it an excellent resource for anyone looking to study and understand the Quran on a deeper level.