PerfExpert

I can plug the info that this app gave me into a 1/4 mile calculator, and the trap speed (which is the more accurate way to calculate power) is only off by 2.5mph from what my car actually ran at the track. I'm impressed! You need two things, a phone with a good g sensor, and you have to be able to plug in all the info the app asks for. The less accurate your car statistics are, the less accurate this app will be. Happy I spent the money.

I downloaded it to use for timed run but it is pratically hard to get it. How to use ? It is not friendly. There is app for android only which I wanted it is called Dino. You setup the speed range like 50-150km/h and when you reach the minimum speed it start recording automatically and ends when you get to 150..

I wasn't ready to go spend hundreds of dollars on a Dyno run. So I went looking for a Dyno for my iPhone and I came across a PerfExpert. PerfExpert was the first performance app I tried. Their website has the information that was not included in the app for how to set it up and make it work. It works so well for me that I didn't even go look for any other dynamometer apps. I recommend this app for anyone that's interested.

Ten bucks down the drain... seems like a cool app, only if you have a supported vehicle. Should just put that $10 towards a Vbox.

I have had 3 dynos on my car within the last month so I know what my graph should look like. My car was not listed in the pre selections so I had to input that data. The graphs were really close. It would be impossible to say they just used factory data since my data was not available and it didn’t ask for the horsepower at all. So two thumbs up for me.