Everything we have is computer-based and that even includes our cars. But unlike a smartphone, who knows the first thing to do when a light goes on to scream out that there\u2019s a problem with the vehicle we rely on for getting around? Considering how much it costs just to drive into a garage for a mechanic to take a peek \u2014 why isn\u2019t there an app for that? There is \u2014 but only because of OBDII, which is a port on the car for reading its guts by the professionals. Only now I can do it too, thanks to BlueDriver.\r\nOBDII Turns The Key\r\nThe OBDII port is usually beneath the steering wheel and there it is just below and to the right inside of a cut off of my Mazda 3 (it\u2019s been put on all cars since 1996, fyi). The BlueDriver\u2019s got a socket at one end and fits right onto the OBDII port, I must have done it right because a blue LED on the BlueDriver started blinking, indicating that its Bluetooth was being powered up. This being the first time I used it, I then went to my iPhone and synced to Bluetooth like it was a speaker.\r\nStart It Up\r\nI followed this by starting the engine and then tapped the free app downloaded earlier. This is where it got good. The BlueDriver app starting \u201creading\u201d the car \u2014 performing diagnostics on it and displaying the results for me to review. And in moments it displayed my car's VIN number and other general info about it, so I knew it knew what car it was looking at.\r\n\r\nThis was followed by my doing some checking to see if any trouble codes would be displayed \u2014 fortunately I got an \u201call clear.\u201d But if something had showed up, I could have used the app to tell me what the code meant. Actually the app even included the manual and videos to make BlueDriver easy to use (one even showed how to attach to the OBDII port, maybe I should have checked this first before rushing ahead). No problem if I had had an Android phone instead of an iPhone, since there's an app for Google's OS too.\r\nWhat To Look For\r\nThe app provided data and a look as to info on such things as a Smog Readiness Check, Mode 6, Freeze Frame data and Repair reports. There\u2019s live gauges\/graphs to view, plus the ability to save the data to Dropbox. Some of this stuff I just didn't get first time around, but compared to feeling powerless when a car light on the dashboard goes off and a trip to the shop is gonna mean lots of $$$, I\u2019m willing to learn and think about that ounce of prevention cliche for real.\r\n\r\nBlueDriver can be pulled out once the engine's off and kept until it\u2019s needed at another time. That means it isn\u2019t locked into being used for just one car. Plus it\u2019s small enough to sit in one of the cup holders. A bit of a learning curve to use it effectively, sure. But the results are worth it, even if it\u2019s just knowing that the mechanic isn\u2019t blowing smoke when he starts spouting off codes and rattling off repairs.\u00a0 I\u2019d pay a one-time fee of $99.95 for never getting glazed over like a too-warm doughnut that someone bit into. Getting BlueDriver took care of that.