I found a bug in the exercise details. In the exercise details (any with Splits) the lap unit is hardcoded to the one used during tracking (whatever was set in the Fitbit app settings: miles or kms). The values are converted to the currently used unit yet the label doesn't change.
Steps to reproduce:
1) switch unit to miles
2) track run/bike
3) after finishing open activity and go to Splits view:
The column is labeled "Miles". It's correct.
4) switch unit to kms in the App Settings and go back to the exercise details and Splits:
5) See values converted to kms yet label still says "Miles"
The bug can be reproduced when tracking as kms and then switching to miles. Then the column will be always labeled "Kms" regardless the unit app uses (but values will convert).
Best Answer