A convenience store is read as quick fixes and everyday needs met on the spot. Dream books take it as relying on what is close at hand, and as a habit of grabbing what is easy.
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.