The Neuro Entrainment app has a binaural beat, an isochronic beat, and a monaural beat tone generator. You can generate your own beats for whatever time you want. This app is use for Brainwave entrainment. “Brainwave entrainment is any practice that aims to cause brainwave frequencies to fall into step with a periodic stimulus having a frequency corresponding to the intended brain-state.” (http://en.wikipedia.org/wiki/Brainwave_entrainment). Brainwave entrainment can be used to overcome addictions and help with ADHD. “Our predominant brainwave cycle (speed Hz) determines our general state of mind, consciousness and thought - everything we do basically. By changing our brainwaves we change our current condition and this can be hugely advantageous to bring all types of positive change. By lowering our brainwave cycle speed we enter into states of relaxation, meditation, hypnosis etc. By increasing our brainwave cycle speed we enter into heightened states of mind which can be good for increasing energy, physical activity, and responsiveness.” (http://www.giovannilordi.com/blog/what-brainwave-entrainment-how-do-i-use-it-my-recordings).