Wa `alaykum As-Salamu wa Rahmatullahi wa Barakatuh
All those applications fall within the category of fortune or future telling. If, however, one believes in the predictions of their horoscopes, whether spoken by an astrologist or written in books of astrology, he falls directly into disbelief as stated by the Prophet (peace be upon him): “Whoever approaches an oracle or fortune-teller and believes in what he says, has disbelieved in what was revealed to Muhammad.” (Ahmad and Abu Dawud)
The punishment in this hadith is simply for approaching and asking the astrologer, even if one is in doubt about the truth of his statements. If one is in doubt about the truth or falsehood of astrological information, he is in doubt about whether or not others know the unseen and the future besides Allah. This is a form of shirk because Allah clearly stated:
“And with Him are the keys to the ghayb (all that is hidden), none knows them but He and He knows whatever there is in [or on) the earth and the sea; not a leaf falls, but the knows it. There is not a grain in darkness of the earth nor anything fresh or day, but is written in a clear record.” Qur’an 6:59 “Say: None in the heavens and the earth knows the ghayb except Allah, nor can they perceive when they shall be resurrected.” Al-Qur’an 27:65
Almighty Allah knows best.
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