Generally speaking, Pacer will not count steps when you are driving.
However in some circumstances, it might count some steps because of system restrictions, which depends on road conditions and where you place your phone.
If this issue occurs, you can tap the pause button in the lower right corner of the home page on Pacer Android to pause the step counter when you are taking a long drive.
Note: Pacer iOS does not have this feature.
We are continuously improving our app and working to combat such issues.