How to track sleep

If you have a fitness tracker, use that. Most of them, like Mi Band and Fitbit, track your sleep automatically if you wear the gadget to bed. But you don’t have to wear a fitness band all the time to track your sleep. There are many other gadgets you can use if you are uncomfortable wearing yours in bed or don’t own one.

1. Apps like SleepAsAndroid or SleepCycle can also track your sleep. Launch the app before you go to bed, set an alarm, and put the phone somewhere next to your face once you’re in bed. Most of them don’t only track the stages, duration, and quality of your sleep but also work as a smart alarm. They will help you get up at the right time during your sleep cycle to experience less stress and be more alert.
2. Withing sleep analyzer is a thin sleep tracker you put under your mattress that can measure heart rate, breathing, and the time you are actually asleep when you’re in bed. 
3. The Oura Ring is a sleek, futuristic ring you wear on your finger. Like traditional band trackers, the ring analyzes your activity and your sleep.