Android/iPhone: White Noise is an easy to use tool for generating ambient noise and taking timed naps—perfect for turning your iPhone or Android device into a power-nap companion,
White Noise comes with 10 ambient loops including rain, fans, trains, thunderstorms, crickets, and more. You plug-in your headphones, cue up the track you want, and set either a timer or an alarm depending on whether you want to nap for a set amount of time or until a specified time.