Place your smartphone in a vehicle, calibrate the sensors by clicking on a button and select the range for the visualization (depending on the power of the vehicle). Now you are ready to visualize the GForce while driving like in a racing car! Please take care when using this app and don´t keep yor eyes out of the road for a long time, safety first! And of course, respect also the rules. If you have some suggestion. miss some feature or find some problem do not hesitate on contact the development team, we are happy to improve the app.