It is called Dynolicious and uses the iPhone's built in accelerometer. I just installed it and have not played with it yet, but here are a few videos. Apparently it is pretty accurate and better than the G-Tech. It is also much less expensive assuming you have an iPhone.

http://videos.streetfire.net/video/i...ore_175854.htm
http://videos.streetfire.net/video/i...deo_174587.htm

 

I played with one a bit and didnt get good results. I do think the issue was from having a passenger hold onto the phone. If it were mounted so it could not in any way move perhaps the results would have been better.

Pretty cool idea none the less.

-Gun

 

I played with this app some in my Honda last night. It is DEFINITELY affected by jiggling around. Putting it in the seat next to you or having a buddy hold it will not work. The more secure it is held in the car and the more horizontal is can be held the better. I have nothing to compare it to with this car, but it is consistent.

 

Thats cool!!