Charge 3 sleep and distance issues

[Beckie_Boo]

Hi there 👋

My 4 month old Charge 3 has started inaccurately recording my sleep and mileage. It'll start recording my sleep when I get into bed, even if I don't actually go to sleep until a couple of hours later and will stop recording my sleep 20 mins after I've woken up, thus giving an inaccurate reading.

When I go out for a run,  I have the audio cues turned on and it'll tell me I've clocked over a certain mileage e.g. 7 miles. However, the device and app will show a smaller number e.g. 6.2 miles.

I have the Google Fit app running at the same time, and the different in mileage between Google and Fitbit is quite vast and getting worse.

I've tried resetting the device several times with no avail. 😕

Is anyone able to help me? 

Moderator Edit: Clarified subject

[AlejandraFitbit]

It's great to see you around, @Beckie_Boo.

When your body is completely at rest and you haven't moved for about an hour, your Fitbit device records that you’re asleep, that's why you are seeing this information even if you aren't asleep. For more information about this, you can check the article: What should I know about sleep stages?.

Now about the distance, Fitbit devices calculate distance based on the device’s accelerometer data and stride length setting.

Default stride length is based on your height and gender. If available, Fitbit devices use GPS data to calculate more precise distances.When you sync your device, our algorithm interprets the data from the device, and you see your distance traveled in the Fitbit app. 

Note that when you track an exercise with GPS, both GPS and accelerometer data are used to calculate the distance shown in the Fitbit app. For more information about accuracy, check the article: How accurate are Fitbit devices?.

Let me know the outcome.