I usually don’t leave reviews, so just the fact that I am taking the time to do this, should show you how much I like this product. BUY THIS APP. It is a health and a life saver. Most mornings I have been struggling with depression and headaches. I listened to the motivational track, and wham, my headache is gone and I feel happier and more energetic. These isochronic tones really work! Who needs coffee anymore? This works way better! The application is easy to use, intuitive, and you do not need an instruction manual to figure it out. Well thought out design. I love the ability to turn the music on or off and the nature sounds. I actually like the Isochronic tones without any nature or music tracks over it, so thanks for allowing the customization options.