Need to measure your 0-60 time, quarter-mile and more but don't have a drag strip in your backyard? There's an app for that. BMW has released a free iPhone app that measures both acceleration runs and the g's you're pulling in the process.
Of course, we wouldn't condone the use of a deserted back road as a makeshift drag strip and would always encourage you to keep your high speed runs on the track, but should you disregard our warnings, this little app might come in handy. We've showed you other dyno apps in the past that take advantage of the iPhone's built-in accelerometers to measure your car's performance, but they cost anywhere from $5 to $15. Now, BMW has undercut the competition with a free app that will measure both acceleration and
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