Measure 0-60/Quarter-mile with your iPhone

[trev0006]

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.

[rks838]

Wow. I'm gonna craaaaaaaaaaash...

[Eckoman]

http://www.dynolicious.com/ has way more features and its very accurate if calibrated correctly - love it!

[Leadfoot]

http://www.dynolicious.com/ has way more features and its very accurate if calibrated correctly - love it!

Bought it just yesterday for my iPhone-3G and it's a great little toy. I wish I could down load the data from the phone, has anyone any ideas?

This morning I did a trial run, I missed second gear which fu@ked up the times but still an impressive run.

0-10mph - 1.00s
0-20mph - 1.73s
0-30mph - 2.76s
0-40mph - 4.29s (as you can see this shift so real bad) #
0-50mph - 5.22s
0-60mph - 6.22s
0-70mph - 7.38s
0-80mph - 8.65s
0-90mph - 10.03s
0-100mph - 11.79s

#= the line that detects the shifts fell off the bottom of the screen. :blush:

Other data supplied as
60ft - 2.65s @ 27.5mph
330ft - 6.63s @ 60.9mph
1/8mile - 9.56s @ 86.6mph
1000ft - 12.00s @ 100.9mph
1/4mile - 14.06s @ 109.9mph

P.S.
Surface was wet but basing my own estimates that I lose close to 0.7s on that first shift I am quite pleased just how fast my S5 is.

[Eckoman]

Bought it just yesterday for my iPhone-3G and it's a great little toy. I wish I could down load the data from the phone, has anyone any ideas?

No, currently you cannot transfer your runs to the PC. But that might be implemented in a later version. As this App is in the top selling charts the developers sure have the funds to code that kind of a feature

Great run btw!