Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
The apple in a dream is a man's ambition and what he strives for. Sweet apples are lawful wealth, and sour ones are unlawful wealth. Counted apples are counted dirhams (money). The apple tree is a faithful man, close to people.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
Apples indicate children and beautiful faces. Whoever smells one in a mosque will get married. Whoever eats one will get what he desires. Apple juice is sustenance from a noble man.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
Apples are interpreted as benefit and pleasure. Whoever gets one will attain what he wishes for, proportional to it. A green apple is a blessed son, a red one is a benefit from a ruler, and a white one is a profitable trade.