Onychomancy or onymancy is an ancient form of divination using fingernails as a "crystal ball" or "scrying mirror" and is considered a subdivision of palmistry. As with palmistry, the contradictions between different interpretations and the lack of evidence for the predictions have led onychomancy to be viewed as a pseudoscience by academics.

Fortune telling is the unproven spiritual practice of predicting information about a person's life. The scope of fortune telling is in principle identical with the practice of divination. The difference is that divination is the term used for predictions considered part of a religious ritual, invoking deities or spirits, while the term fortune telling implies a less serious or formal setting, even one of popular culture, where belief in occult workings behind the prediction is less prominent than the concept of suggestion, spiritual or practical advisory or affirmation.