I have downloaded a fair number of apps to try with my MindWave Mobile headset and I have settled on ZenZone. It seems to be the most professionally designed from a UI standpoint and I purchased a few more in-app modules after testing the app for about 3 weeks. I have noticed improvement in sleep, general reduction in stress and a greater sense of well being since using the app on a daily basis. I do believe that hypnosis is involved and I am not sure how much is actually related to being able to change your brainwaves but whatever it is, it is working. If you have a MindWave headset then this is the app to get.