PerfExpert App Reviews

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Pretty spot on. 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.

Helped tune and see HP gains with a turbo. If you get all the parameters right, it’s accurate to +- 5 HP. This app worked so well for me and helped me visualize and tune power gains for my old 86 300ZX, recently turbocharged.

Need a little help. Trying to put all the numbers in properly to dunk the car but I have a 2017 civic lx hatch that is a CVT transmission. I have full bolt ons and running full e85. In the fuel option it only lets me choose between gasoline or diesel and the second problem I have is that I don’t really have any defined gear ratios besides my first gear final drive and reverse. Would the app still be accurate missing those parameters?

Very accurate, useful and stable. I have tested numerous apps which some where OBD2 connected and some like this one, independent of OBD2 being a stand alone one. I was surprised to find out how accurate this app in comparison to a standard dyno. In fact, I feel that this app gives me a more reliable reading in comparison to commercial dyno where parameters can be adjusted by the operators which may not be in line with the proper characteristic of my car. One improvement that I would suggest is: to allow the user to choose the 2 or 3 results that will show up as the “average “ and allow to present this “average “ in a graph. Great app.

Great car performance information. 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.

Nice Accuracy. Key to this app! Key in Correct info. And this app is Great. Excellent tuning tool.

Buy a Vbox. 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.

Don’t do it. Does not work at all

Calibration. Once I go through the calibration routine, it gives me no choice to move onto a test-only a “back” button that takes me back to the “calibration” button, forcing me to start over, in a circle. What may I be doing wrong?

Nice. I have contacted the creator numerous times and he has helped me everytime!! I recommend this app. With the instruction and information on the forum you can see muy progress that can very well help you. The creator is very responsive just as the app. Thanks!

If I could give a 0 I would. Bad customer service. App doesn't work at all. Waste of money. Doesn't even have all vechs in their system. Would not give refund after asked over and over because their system doesn't have my vech. Would not recommend this app to my worst enemy

Timed run. 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..

Doesn't work. I put all the work in setting up my car but it A) can't retrieve weather data and B) apparently the GPS doesn't work either because it never detects my speed to start measuring.

This app is awful!!!. Did not contain my vehicle, common truck!! DO NOT BUY!!

Pretty impressed!. 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.

Does not work at all. I tried with two different trucks, and with the correct information and gear ratios the app read that I was going well over 140mph when I was really doing 60mph. I tried with another truck that had a 6.55 gear ratio and the app complained that it was an unlikely ratio.

Waste of money. Does not work as advertised, nor does it work for automatic transmissions. Waste of my money, I want a refund.

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