The MuseMonitor app for iOS shows various real-time graphics of brain waves while you are using the headband. It indicates alpha, beta, theta, delta and gamma brain waves. The problem is that it does not give any audio feedback! You need to keep your eyes at least a little open to see what the graphics are doing.
An ideal app would show real-time brain wave graphics as well as give audio feedback for each type of wave. You would be able to turn off/on any wave in the settings. Tone - or maybe timbre? - would indicate wave type. Volume of each wave would indicate amplitude.
It would also be good to be able to switch between raw brain-wave graphics and a more user-friendly graphic indicating levels such as deep-calm, calm, sleepy, neutral, in-the-flow, active, etc.
Personally I’d rather have graphics based on brain-waves, with maybe some advice on what the different waves mean for state of consciousness, as well as what specific combinations of waves would indicate. Calm, Neutral and Active is just not enough feedback for me. I want to know what’s going on at a deeper level of understanding of brain function.