Is it possible to generate a convincing sense of speed on a four-inch display? It might seem unlikely, but the App Store is bursting with an excellent and diverse array of racing games that beg to differ. Whether your tastes run toward arcade antics or simulation-style precision, or you prefer to loop in a cartoonish kart racer from time to time, we've got you covered with our picks for the 10 best iPhone racers available today. Heck, a couple of them don't even give you active control of your vehicle, but still deliver intriguing touchscreen tweaks on the genre. Whatever your speed needs, these zippy affairs are sure to satisfy.