Starbucks offered a free alarm clock app, so I thought I'd download and try it out. I noticed it had a graph dictated how deep (blue) or light (green) my sleep is, which was surprisingly accurate. If I woke up in the middle of the night (yellow), it'd report it accurately. I don't have an iWatch or whatever to monitor me so I have no idea how it figures this out, unless it utilizes the iPhone's accelerometer to judge from my movements in bed how awake I am. I'm testing this now by placing the phone on my nightstand for a week and then on my bed for a week and see the results. Of course I could just, you know, go to the app's website and see, but I kinda like figuring this out for myself. Bronx Science experimentation, bitches!