The distance is calculated using the height, weight, age, and gender information that you provided to us when you set up your Withings account, as well as the number of steps that you have taken.

If the distance displayed in the app doesn't seem accurate, please check that the height you've entered in your profile is correct. 

Ensure the band is on comfortably tight to ensure all steps are counted correctly. For the most accurate results, you should launch workout mode to track distance with the phone's GPS.

When using GPS tracking for activities with the watch, you may notice that the distance shown in the app differs from the distance shown on the watch for the same activity. This is due to post-processing that happens with the data in the app (steps, GPS data, etc.) the results in a more accurate measurement of your total distance after the activity is finished.

The data shown in the app should be regarded as more accurate than what was shown on the watch.