The التفسير الموضوعي للحافظ المتقن app, developed by smart superstar, is a free educational reference app available on Android devices. It is a comprehensive book that explains the verses of the Holy Quran, along with their vocabularies and the reasons for their revelation. The app is divided into five parts, each containing a range of chapters, from the 21st to the 30th Juz of the Quran. Each section is also accompanied by a margin of the Quranic text.

This app is an essential resource for Muslims, as it offers a detailed explanation of the Quranic verses, their meanings, and the context in which they were revealed. It also provides a comprehensive understanding of the themes and topics covered in each Surah. The app is user-friendly and easy to navigate, making it an excellent tool for anyone seeking to deepen their understanding of the Quran.