Ionic tracking distance

[MuzDownUnder]

Hi, here's a problem Fitbit might not be aware of. My wife and I both had Ionic trackers which we would use at the same time while walking. My one was fine but my wife's one was very erratic with the distance it measured. It could be plus or minus 10% with no pattern. We put it down to being faulty and ignored it. Now I have changed to a Sense and suddenly her Ionic and the Sense are measuring distance exactly the same with kilometer markers within a second of each other. So the Ionics were interfering and when she changes to a Sense next week we will see if it happens again. 

Moderator Edit: Clarified subject

[SilviaFitbit]

@MuzDownUnder Hi there! Thank you for getting in touch about this. 

I appreciate the detailed information shared. 

When you track an activity with GPS, your device calculates your distance using GPS data rather than steps. If you begin moving before you get a GPS signal, your device calculates distance using your steps until GPS connects. 

To update your stride length, track a run with GPS or measure your stride length manually. For more information, see Can I change my stride length in my Fitbit account?

I'll be around if you have any additional questions!