Q-Tuning is a free Android app that promises to dramatically improve your vehicle's performance and fuel economy. Developed by Quantum Tuning, the UK's largest ECU programming service dealer group with over 600 dealers and 1000+ approved installation centers, this app is a market leader for remapping and chip tuning across a range of over 3,000 vehicles every month which includes cars, vans, motorhomes, trucks, and tractors.

The app claims to modify the operating parameters in the ECU's program or 'map' to increase power, torque, and improve MPG without changing any hardware in your vehicle. The chip tuning process can take under an hour depending on the vehicle and ECU type and can be easily reverted to the original default settings free of charge as the app always keeps a copy of the original software as a backup.