Audi of America has created Audi A4 Driving Challenge for the iPhone. Gamers navigate the A4 through a series of courses. Five courses are included, each one more difficult than the last. The driver runs three laps on each course, lap time and course time being displayed. Controls for accelerator and brake are located on the touch screen, steering uses the accelerometer to turn the car as the user tilts the phone. Braking increases steering response for the more challenging parts of courses.

Audi A4 Driving Challenge is available for free from iTunes for the iPhone or iPod touch with the 2.0 software update.