Has anyone used this app before? I just found it yesterday. They have two versions a free one a and one that cost $10. Apparently the free one will just measure horsepower. The $10 one will actually give you 1/4 mile times and has a simulated tree and everything. I am not sure how acurate it is yet. Just wondering if anyone knows how acurate it is. From the comments I read some people say its right on, which would be awsome. I will have to test it out when I get some time. I just had my car dynoed 2 weeks ago so I have some good numbers to base it on.
I heard of one of my friends using it but never heard how accurate the results were. It seems like it would be just as good as a Autometer D-PIC performance meter or one like that. Considering the sensing abilities of the phone im sure it would be worth a shot.