Accuracy of sleep tracking

[Marmcharm]

I didn’t wear my Fitbit last night because I was charging it.  I checked the “How did I sleep” section in the morning.  It showed my (supposed) sleep patterns for the previous night!  How could this possibly be?!  This makes me doubt the veracity of the entire sleep section, if not the whole Fitbit accuracy!!!  I hope I can get an answer to this!! 

[MarciM]

Hi @Marmcharm What type of tracker do you have? I’d you have a tracker that doesn’t monitor heart rate, it doesn’t have any way to know that it is sitting on a desk verses being on your arm while you are sleeping. Small vibration, like a forced air furnace blowing near it could show slight movement while on a desk, thus replacing sleep movement. 

[Marmcharm]

Hi MarciM!

Thank you for responding. My tracker monitors heart rate.....so......where
in the world would the fitbit get the sleep information?!??!

[Nidec · Accepted solution]

I have a Blaze. My Iphone has the ios app, my Samsung tablet has the Android app.  Both have totally different sleep tracking results,  sometimes 2 hours difference for the same nights sleep. 

At least one, if not both,  is very inaccurate

[Marmcharm]

Thank you for your response. So it sounds like I shouldn't consider the
sleep results as being accurate. That's very disappointing. Thanks again.