In the name of God, the Most Gracious, the Most Merciful, and praise be to God, Lord of the worlds, and prayers and peace be upon the Messenger of God, and his good and pure household. To proceed, the basis of religious sciences and the foundation of all religion are beliefs, for without belief, no stone remains on another, neither jurisprudence nor Shari’a is established, and neither prayer nor work is accepted. In addition to the existence of a huge torrent of ideological suspicions spread by misleading tendentious parties. Accordingly, the idea of this application was based, and the application included 750 doctrinal questions on the following topics: 1- Proving the existence of God and responding to atheists. 2- Evidence of Islam and the Qur’an. 3- Responding to suspicions about Islam. 4- Proof of the saved sect and the right doctrine. 5- Statement of the beliefs of the surviving group. 6- Responding to the suspicions raised on the right doctrine. 7- Responding to deviant movements. 8- Rejecting the theory of atheistic evolution. And many other religious topics.And for more doctrinal topics, as well as for more doctrinal and doctrinal books and applications, kindly join our channel on Telegram (the preparation for the emergence is our sacred duty)