Meet the Wakē: a robotic solution that mounts to the wall behind your bed and works with your smartphone to wake you up gently. It uses a body heat sensor to determine where you are and uses a focused beam of light and a parametric speaker to get the job done. The speaker is designed not to disturb your partner. There is no wearable to wear and no camera to worry about.
The Wakē has a companion app that works like a regular alarm clock app. Just tell Wake which side of the bed you sleep and how you want to wake up, and the device does the rest for you. The Wake turns itself off when you get up. Its battery works for months. There is also a snooze feature. More information is available here.