How Does This APP Work? The sounds in this app can be an effective tool to help you relax and fall asleep using sound therapy. White noise sounds create a familiar, highly effective way to relax, block out unwanted sounds and create a soothing sound environment. These baby specific sound tracks are carefully designed so that you experience our world famous sounds uninterrupted for the best sleep experience possible. Features: 4 INCLUDED SOUNDS - Brown Noise - Pink Noise - Rain on a Tent - White Noise SESSION TIMER - 5 to 120 minute session timer with continuous therapy option. SOFT-OFF VOLUME MANAGEMENT - Full volume control with soft-off volume management.