Many autistics have trouble sleeping well, and it doesn’t help if your alarm rings in the middle of a sleep cycle, when you’re in deep sleep. Getting up from deep sleep can leave you feeling washed out for the rest of the day. The SleepTracker is a watch you wear in bed, that tracks arm movements with an accelerometer. You can set it to wake you within a time window (say, 20 mins before or after 8 AM), and based on your movements, it will buzz when you are more likely to be in shallow sleep, and therefore more likely to feel rested after waking. Here’s a review of the SleepTracker Elite by DadsOnTech (this review is for the 2012 model, which has since been upgraded).