Dynolicious is the first automotive performance meter available for the iPhone and iPod Touch. Dynolicious uses the hardware built in to your iPhone to measure the performance characteristics of your vehicle. No external wires or equipment is necessary, simply slip the iPhone into a cradle of cup holder and go!
Some of the performance metrics in which Dynolicious can measure:
0-60 acceleration
1/4 mile elapsed time
Lateral G's
Horsepower
Unlike other accelerometer-based performance meters, Dynolicious uses the advanced data-handling and display capabilities of the iPhone to make the most of your performance testing. Dynolicious maintains a history of test runs, showing your averages and trends in your results. Dynolicious also allows you to enter modifications performed to your vehicle, and will instantly show before-and-after results to easily identify gains or losses.
HP and BHP are the same thing as far as I'm aware, it's just missing out the "B" (brake) in front of it. I'm sure HP is how the americans refer to it, while we refer to it as BHP.
I really think the BHP readings are a load of rubbish. Have a quick google of "fokker 70" and you might understand why SimonS is doubting his results!!
I understand how the app could calculate the 0-60 and 1/4 times using the GPS but I just don't understand what features of the iPhone's technology it is using to calcuate BHP.
Just for reference a standard Cooper puts out 120bhp (I think)