PerfExpert – Mobile Dyno App | Measure Horsepower & Torque

Measure horsepower and torque on your ownUse your smartphone as a dynoTest and compare performance upgrades

Make your own dyno test at anytime

A real dynamometer in your pocket

2% accuracy

Hundreds of users have compared PerfExpert with chassis dynamometers, showing great accuracy and consistency.

Comparison

Compare your results to have pertinent insights about which tuning or parts provide best performances.

Sharing

Share your results easily with friends, on any social network.

See it in action

Performing tests with PerfExpert is fast and easy to achieve

Dyno test with your phone's sensors

Dyno test with an external GPS

They tested and approved it

You too, perform your own dyno test with your Android or iOS device

So far so good

So far it's awesome. Let me get some more runs.
  
Christian Vanegas

Best dyno app

Very accurate dyno and
timed run 
 
Matt Blake

Excellent

The results are spot on, very impressive for "only" an app compared to a rolling road.
 
Tom Gijsbers

How It Works ?

It's simple

1. Create your car profile

Describe your car to PerfExpert by providing information such as car weight, tire sizes or engine displacement (see complete parameters list in the FAQ).

2. Set up your phone or external GPS

Using your phone’s internal sensors? Mount your phone firmly inside the car.
Using a supported external GPS? Connect it to PerfExpert. No specific phone orientation is required. 
External GPS dyno tests require External GPS Unlock or Pro and a compatible GPS device, sold separately.

3. Accelerate through the entire rev range

On a closed track or private ground, choose a clear, flat and straight section, then accelerate from low to max revs in the same gear: that's it!

Go further with an external GPS

Connect your compatible Dragy, RaceBox or VBox Sport to get horsepower and torque curves with PerfExpert.

Rolling start

No need to stop the car before each test

Mount anywhere

No fixed phone orientation required

Automatic slope correction

Uphill and downhill effects compensated

Unlock external GPS features

Available with External GPS Unlock, a one-time in-app purchase, or included with a Pro subscription.

Requires a supported external GPS device, sold separately:

Dragy: 70 · 70-C · Lite · Pro — Android only (PerfExpert v2.5.1 or later)RaceBox: Mini · Mini S · MicroRacelogic: VBox Sport

Features

Base app: a one-time purchase on the App Store or Google Play. Includes dyno tests and timed runs using your phone’s internal sensors.
External GPS Unlock: a one-time in-app purchase that enables dyno tests with a supported external GPS device. Requires compatible hardware, sold separately.
Pro subscription: includes external GPS features, custom logo branding, CSV export, cloud backup and cross-device sync. External GPS features require compatible hardware, sold separately.

Feature	Base app	External GPS Unlock	Pro subscription
Measurement
Dyno test with internal sensors	✔	✔	✔
Timed run with internal sensors	✔	✔	✔
Timed run with external GPS	✔	✔	✔
Dyno test with external GPS — rolling start, no phone mounting required	✖	✔	✔
Automatic slope correction (external GPS)	✖	✔	✔
Results & sharing
Full results: max values, charts, test conditions and parameters	✔	✔	✔
Recalculate result after editing test conditions or parameters	✔	✔	✔
Share result via public link	✔	✔	✔
Export result as image	✔	✔	✔
Export result as data (CSV)	✖	✖	✔
Compare results from the same car (on the PerfExpert web app)	✔	✔	✔
Vehicle management
Car profiles with AutoRef database	✔	✔	✔
Pro exclusive
Custom logo on result charts	✖	✖	✔
Cloud backup & cross-device sync	✖	✖	✔

Don’t guess — measure

Start to test your car’s real performance

Any questions ?

Feel free to contact us !

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