Babies love white noise. They have spent 9 months in the quite loud womb so they are used to "noise". Background white noise is actually calming for your baby and resembles the kind of sounds they would hear in the womb. The app contains great selection of soothing white noise and lullabies. It has a simple timer that saves your battery. In addition to that it contains calming "shh-shhhh" sounds recorded by parents. The app does not require internet connection so you can use it wherever you are