I am posting this here because I feel it fits the "Performance" title. I installed this app on my iTouch and it seems to work well. I'm just not sold on it being acurate to 100%. My '87 300D runs pretty well but I didn't think it was capable of 9.8 second 0-60 times. The app shows 137rwhp which translates to 171 sae net hp. (assuming a 20% drive line loss). I know I've seen some others post using this app, just wondering what the opinion general opinion is. Graphs look pretty cool.