CO2 Green Drive is a GPS tracer for Public and Private Events where a pre-defined route should be followed and even drawn on a big screen live as the participants move around.
You can make your own route online and share the event-name with your friends. When they start the APP and enter the event-name they will be traced in the same group.
Just enter a racename like "gilvader" and press the START button.
If you participate in an Official Green Drive then enter the Racename from that event to login.