The Hatch Rest+ is our pick for the best overall white noise machine for a ton of reasons: first, it's easy to control via an app on your phone. Second, it has great sounds with a realistic quality — the rain sounds like rain. It's portable, which most are not. It has a battery life of eight hours, in fact, letting you move it to wherever baby is resting. It acts as a nightlight, but you control the color and brightness. Finally, it has a ready to wake function that gradually increases the light until it's time for baby to wake up.