Beddit tracks sleep without the wearable

We all know how important sleep is, and we know we probably don't get enough of it, especially during hectic workweeks. So do you really need a sleep tracking device to tell you what you already know?[Related: Fitbit rival Misfit Link costs $20, automatically tracks sleep]That's the question the makers of devices such as the Beddit Smart Sleep Monitor ($149) must answer if they want consumers to buy their trackers. I've used several different devices to track sleep, including Beddit. If you