White noise can be hugely helpful when trying to fall and stay asleep. The Snooz White Noise Machine provides it. Thanks to a real fan hidden inside, it creates the sound of moving air naturally, letting you adjust it from the light noise of a table fan to the deep drone of an airplane. Its companion app allows you to set the volume or schedule an automatic shutoff right from your phone. It's just 2.5" tall, so it's easy to pack along wherever you go, and it's available in two hues to match most decors.