The on/off sign is read as energy and the wish to control it. Pressing it suggests starting fresh or shutting down to rest; a symbol that will not respond, a feeling of being unable to switch off.
Where in your waking life have you met something like this lately?
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.