The scanner reads and copies what lies in front of it. Dream books link it to scrutiny, being examined in detail, or the wish to capture something exactly.
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.