"Do you find it hard to wake up to a normal alarm clock? Do you notice that on some mornings it's harder to rise than others? It's likely that this difficulty arises because a standard alarm clock isn't capable of detecting where you are in your sleep cycle, so it's not possible for it to wake you when you're most likely to be receptive to its tone. "

Okay, we are heavily impressed. The Sleeptracker  watch monitors your body all night long for optimal waking moment and gently wakes you up when you are most alert during the set window of alarm time. It works using a motion-sensor (an accelerometer) that senses the light sleep stage and then when you are almost awake or getting out of sleep as per your body clock, the alarm sounds waking you up feeling refreshed.

The Sleeptracker stores 8 hours of sleep data each night and works looks like an ordinary watch, till you tell someone the secret. It's available for US$ 148.99 from here.