Calculates stopping distance and remaining traction. It also contains a tachograph.THIS IS A UNSTABLE ALPHA VERSION!Instructions and information:- Activate GPS- Mount the phone vertically on the dashboard, perpendicular to the ground – The app needs time to find your position and speedDiclamer:- Use at your own risk- This app logs your location and other information your SD-cardKnown bugs:- Massive use of batteryIf you encounter problems, uninstall.