Over the past year or so, we've downloaded and deleted many unmemorable apps -- particularly those from automakers -- but BMW's M Power Meter breaks our long losing streak. Just take it along in the car, and with a simple click of a button, the app tracks speed, acceleration, travel time, and more from your drive. Best of all, unlike some apps that perform similar tasks, the M Power Meter is free. And although the name says BMW, it's useful for anyone who has 30 seconds to download it. Catch Nelson Ireson's full review of the app at Motor Authority.
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