A hot air balloon is read as gentle ascent and widening perspective, carried by warmth rather than force. Because you cannot fully steer it, dream books also link it to letting the wind of circumstance decide your direction.
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.