I really enjoy all the different types of noises offered. I sincerely hope the developer would consider though, an option to slow down the track. Most of the noises would be more soothing at a slower rate so the heart and breath could follow and reach a more relaxed state. If they were to add a speed adjuster, much like the volume adjuster, this app would have no competition. It would be PERFECT if the user could adjust for either meditative breath or sleeping breath; the way the sounds are now, its too rapid for relaxation.
JennaLowe about White Noise: Sleep. Relaxation. Meditation. Yoga.