I am the father of a newborn baby and his name is Oliver.
Olly had some hard time sleeping in his first days so Ive created this little app, which we use to schedule his sleep everyday.
It has the sounds of his mom Claudias hair dryer and also the sound of a little creek down the road where we live in New Zealand. Both sounds can be played for indefinite time, even if the phone is locked or if you are using another app.
One thing we found useful was the ability to turn the screen yellow and provide some mild warm luminosity to the bedroom while the sounds were being played.
To make it easier to change the volume and the brightness late at night while we were sleepy, I added the ability to slide anywhere in the screen left and right to change brightness and up and down to change volume while the app is open. Both really handy when you are not keen to look for sliders and buttons.