The author tried two different apps: White Noise, a free app that produces soothing white noise in the form of wind, rain, the ocean and more. You can set an alarm or a timer so the sound gently lulls you to sleep or wakes you without the harshness of a loud alarm.
Next, she tried Pzizz Sleep, a slight investment at $5 that uses unique voice tracks to help you relax and lull you to sleep.
Have you ever tried one of these sorts of apps? Any suggestions of which to try?