If your band is undercounting steps or distance (for example a 5 km run logged as 3.7 km, or a "wear your band" message while you are wearing it), a common cause is Battery Saver / Power Saving mode on your phone or for the Rolla app.
Battery Saver restricts location services and background activity, which the app relies on to track steps and distance accurately.
- Turn off Battery Saver for the Rolla app (and avoid system-wide power-saving while tracking).
- Confirm location permission is enabled for the app.
- Re-test your activity.
Following the step-tracking setup steps support has shared usually resolves the discrepancy.