Fantastic and flexible app for sleep noise and alarm clock

Ive had this app since I had my original iPhone, and
I still use it.

It has an excellent selection of sounds.
Most importantly, it allows you to go to sleep to your preferred soothing background noise at bedtime and then transition into a gently and gradually more intense alarm clock when it is time to wake.

SquarewaveJ about Ambiance, v3.5.1