There are some Iphone and Android apps out there that work on the "sleep cycle" principle.
Basically, your sleep goes in cycles from deep to light. The length of everybody's cycle is on average between 60-90 mins. The idea is that even if you were asleep for 10 hours if you awake in the middle of the deep part of your sleep cycle you will be groggy and tired, on the flip side of that if you only slept for 3-4 hours as long as you wake during the light part of your cycle, you will feel pretty good.
These apps get mixed reviews because the alarm is supposed to wake you during your light cycle and people are generally stupid so there are reviews stating that they were late for work or woke up way too early.
It could be something to try out on days off or something.
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