Has anyone used any good phone apps that help with sleeplessness?

I use spotify, one of the white noise play lists. I got so use to sleeping with some sort of noise down range I pass right out lol.

There are lots of white noise apps. However, I bought an actual white noise machine. They are small, cheap, and work great (especially when you have to work nights and sleep during the day).

Kindle with a boring book does it for me every time.