How often does your alarm clock jolt you awake from the depths of slumber? A crappy wake-up can lead to fatigue and a cranky mood all day. Sleep Cycle promises to keep you from waking up on the wrong side of bed again. Using the iPhone’s accelerometer, the Sleep Cycle alarm clock tracks your movements as you sleep, gauging when you transition between light and deep sleep. The alarm clock will wake you when the phone determines you’re in your lightest sleep cycle during a preset 30-minute wake-up window. The app uses only about 30% of your iPhone’s battery at night, so there’s no need to keep it plugged in. You can also set your alarm to music to ensure you wake up with extra pep in your step.
Available here for: iPhone