كتاب الكبائر - النسخة الأصلية is an educational application available on Android, focusing on Islamic teachings and the concept of major sins. This app presents a critical examination of the well-known work attributed to the scholar Al-Dhahabi, which addresses the topic of major sins in Islam. Users can explore the content that has been scrutinized for authenticity, featuring a version that is claimed to be more reliable based on scholarly research.

The app is designed for individuals seeking to deepen their understanding of Islamic principles surrounding sins and moral conduct. It includes a foreword by researcher محيي الدين مستو, who emphasizes the importance of the manuscript found in the library of عارف حكمة in Medina. This version is noted for its absence of many fabricated narratives and offers a more accurate representation of Al-Dhahabi's scholarly approach.