The app allows you to scan the barcodes of competition tyres used in a rally, enabling you to keep track of the number of tyres used, their barcodes, compounds and the drivers who use them. It allows you to monitor compliance with the restrictions on the maximum number of tyres commonly used in Rally Championships. The app uses Apple's standard EULA (https://www.apple.com/legal/internet-services/itunes/dev/stdeula/).