Im a DRE/SFST instructor and I think its a pretty cool app except on the walk and turn the steps are wrong in the app. It looks like you are having the individual make their turn clockwise (to the right) when the standardized way would be counter clockwise to the left by taking a series if small steps with the right foot around the leading left foot. It would be a simple fix to simply reverse the rows of little feet so 1-9 is on the right and post turn 1-9 is on the left......
Jco233 about SFSTest