DinoDyno

Your doing wrong, it works very well. The first few time I messed with the thing it was way off. But I found my cars height x width, added them together and divided by 2 for a frontal area. That was 1.57 meters on a cobalt ss. Then my drag Co was .324 minus the big wing I used .32. Then my weight. The cars base is 2971. I weigh 200. Gas in my car is 6lbs per gallon x 5, or 30lbs. Dyno weight 3200. See how easy this is. I made 229hp -13% drive train for the cobalt yeilded 200hp on a stock SS/SC. Not too far off. If i dialed my weight exact I bet the hp would be close. Try the app. I am on a 2year old 4g HTC EVO. Still an amazing phone...

Wrong car?? So i pulled this down for my 07 cobalt SS/SC. no mods and i got 260hp which is funny because the 08+ SS/TC puts that out and my SS/SC is only rated for 205 from GM. really funny numbers. Will try again.

Works perfect,if you know how to use it.

Great app just payattion and its not far off

it will give you consistent numbers everytime and thats all that matters when you dyno.

Does not work at all it said my car had 40 hp worthless app

Surprisingly accurate. Had the dub dynoed by pros and this app is within 10 hp of the real thing. Just save your car specs...

Would like to see it changed such that the phone can be mounted in any orientation and then zeroed, rather than having to lay down flat. Vectors man!

Works great fairly accurate must set all specs lay it flat make sure it can't move around

Awesome app once u know how to use it...it aint rocket science! Very accurate