Baby Sleep Calmer

Plug power adapter into your device and run the app in "Listen for Cry" mode. Your phone will start monitoring the ambient sound volume in the room: if your newborn will make any loud noises, a soothing sound will start playing for 2 minutes (lullaby music, rain or hairdryer). After 2 minutes the app switches back to monitoring state.

You can also just play one of the sounds to calm your baby.