The smiley face is read as simple cheer and friendliness. Dream books also note its other side — a fixed, painted smile that can stand for happiness worn as a mask.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.