As a parent raising a child, I made an application called ‘Lullaby for my baby’, to help other parents. It has mainly five (5) features. Firstly, it is white-noise. For those babies under 3 months old, they easily fall asleep while listening to mother’s heartbeat, water drops, cloth brushing sound, etc. So, it is equipped with a function to play up to maximum three (3) sounds (you can select from fifteen (15) sounds of white-noise, that are similar to the environment inside mother, such as T