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    Measure 0-60/Quarter-mile with your iPhone

    Measure 0-60/Quarter-mile with your iPhone - g-tac turns iPhone into performance meter







    One day after spotting the "inexpensive" auto performance measurement tool Dynolicious for the iPhone, we've found another, and it's much cheaper. Liberty For One has released its own automotive measurement tool called g-tac, and its going for just $4.99. For less than half the cost of the Dynolicious tool, you get times and trap speed for the quarter mile, as well as times for 0-60 and 60-0. The g-tac utilizes the iPhone's (and iPod Touch's) accelerometer to determine velocity, so the phone doesn't have to be plugged into the car. The tool also graphs out your last three runs so you can hone your launch technique over time. g-tac's feature list doesn't appear to have the robustness of the Dynolicious app, which also features metrics for Lateral Gs and horsepower, and there isn't much documentation to detail what g-tac can actually do. The early reviews aren't so hot either, as the first seven purchasers have averaged a rating of just 2.5 stars compared to the four star rating for the Dyonlicious app. Since cheaper doesn't typically mean better, we intend to test both apps against an even more expensive hardware unit, and we'll let you know if either iPhone app is worth your hard earned digital dollars.

    Re: Measure 0-60/Quarter-mile with your iPhone

    Very cool. I hope they expand the featureset to make use of the GPS in future releases.

    I bought the Dynolicious one.

    Re: Measure 0-60/Quarter-mile with your iPhone

    Wow... I wonder how accurate that is?

    Re: Measure 0-60/Quarter-mile with your iPhone

    If accurate, this is genius.

    I have been truely impressed with the app store. So easy, so clean, so Apple...

    Re: Measure 0-60/Quarter-mile with your iPhone

    Interesting stuff. Probably not as accurate as a driftbox but what do you want for the money?

    Re: Measure 0-60/Quarter-mile with your iPhone

    Actually Dynolicious says +/-0.08s for the 0-60 and +/-1.5mph for 1/4 trap speed. Needs calibration, not sure how that's done.

    Re: Measure 0-60/Quarter-mile with your iPhone

    Hmmm - I cant believe this is accurate. Yes - the iphone's accelormeter can give feedback about the movement in the moment between full stop and starting. But how should it measure the current speed?

    Re: Measure 0-60/Quarter-mile with your iPhone

    Quote:
    Lars997 said:
    Hmmm - I cant believe this is accurate. Yes - the iphone's accelormeter can give feedback about the movement in the moment between full stop and starting. But how should it measure the current speed?



    GPS.

    Re: Measure 0-60/Quarter-mile with your iPhone

    If the GPS reception and computer are good it should be pretty good.

    Re: Measure 0-60/Quarter-mile with your iPhone

    ^^ So I suppose it will only work with the 3G iphone?

    Re: Measure 0-60/Quarter-mile with your iPhone

    The app does not use the GPS module present in the second generation "3G" iPhones. It works on any iPhone or iPod Touch.

    Re: Measure 0-60/Quarter-mile with your iPhone

    I bought a G-tech RR the other day (got it shipped from Greece) still struggling to get it to work. It picks up the engine rpm through the cigaret lighter

    Re: Measure 0-60/Quarter-mile with your iPhone

    Quote:
    Markdsv said:
    I bought a G-tech RR the other day (got it shipped from Greece) still struggling to get it to work. It picks up the engine rpm through the cigaret lighter




    I remember we managed to accidentally route engine speed through AM frequency on a car stereo in a Fiat Croma my friend had years ago.
    The damn thing sounded like an F1 while accelerating and speakers to max!
    Gooood times...

    Re: Measure 0-60/Quarter-mile with your iPhone

    Apparently it is accurate with calibration, but the software is still buggy.

    I will wait for an update to buy it.

    Re: Measure 0-60/Quarter-mile with your iPhone

    No to change the subject but has any of you experience with the G-tech RR? (still cannot get it to work) --> OK it is ment for my CTT08 and I am currently testing it in my rental laguna estate (phewwwww)

    Re: Measure 0-60/Quarter-mile with your iPhone

    Apple are working on firmware 2.1 right now which will turn the iPhone into a full sat nav unit. So all the hardware must already be present for such apps to utilize.

    Thanks for the heads up on the performance apps!

    Re: Measure 0-60/Quarter-mile with your iPhone

    Dynolicious is now in the top 50 apps, they must be getting a lot of money, hopefully that will allow them to better the software and cheapen price.

     
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