It's expected that you may have some questions regarding of how sleep tracking is working and what all the numbers mean. Let's try answering them.
I have slept not that amount of time, that I see in the app
Sleep tracking with Mi Band like any other similar fitness band is done with an accelerometer. It measures how much you move all the time and what kind of movements you do. When a man starts to sleep, he actually moves less or even doesn't move at all. This is the main sign of your sleep start. During your sleep, there are small movements, but when you wake up you start to move a lot. But still here can be some differences between your real sleep time and calculated one.
I remember/don't remember that I woke up in the middle of the night X times, but the app is showing less/more.
Unfortunately, it's still not that precise, as we would like it to be. Band tracks as waking up any high activity before you actually wake up, it can also include moments when you snooze after the alarm. But awakenings tracking even takes into account possibility for you to walk in the night for a short period (going to the bathroom, for example).
I haven't found the answer to my question. What should I do?
Don't hesitate and contact us!