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PerfExpert - Car Dyno HP Test

PerfExpert - Car Dyno HP Test

Measure Real HP & Torque

12 ratings
99 reviews
#195 in paid Sports
🔧 Utilities
⚽ Sports
$8.99
In-App Purchases

Price history

Details

  • Released
  • Updated
  • August 8, 2012
  • September 21, 2026

Features

Developer

Claude JOSEPH ANGELIQUE
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About

Transform your smartphone into a powerful onboard dyno to measure your car's engine power and torque with high accuracy. Verify tuning, remaps, and upgrades with detailed reports and interactive charts. No external sensors or car connection required.

✓Engine power and torque measurement
✓0-60 mph and 0-100 km/h acceleration times
✓Quarter mile and 400m times
✓Detailed reports with interactive charts
✓Correction standards (DIN, SAE, ISO, JIS, CEE)
✓Customizable units
✓Export results as data files or images
Show original description
+1

What's New in PerfExpert

2.4.2

September 21, 2026

What's new in PerfExpert 2.4.2: - Fixed Timed Run with external GPS: the run now ends automatically when you slow down Previous updates: 2.4.1: - New dyno tutorials for internal sensors and external GPS: new videos, plus step-by-step instructions in your language - Added the ability to recover car profiles from a previous session that is no longer accessible, from Settings > Recover my data - Wider tyre sizes in car profiles - Corrected some text that could show a placeholder or stay untranslated - Bug fixes and stability improvements 2.4.0: - External GPS Unlock: now available as a one-time purchase — yours forever - PerfExpert Pro: subscribe to unlock custom logo on your charts, cloud backup, and CSV data export - Custom chart logo: add your own logo or brand to your dyno and acceleration reports (Pro) - Redesigned export image: cleaner and easier to read - Cloud backup: your results are now safely stored in the cloud (Pro) - Atmospheric conditions: more accurate temperature, pressure and humidity, with a more reliable retrieval - Correction norm can now be disabled - Bug fixes and stability improvements

More

Subscription plans

PerfExpert Pro

External GPS, custom logo, CSV, cloud sync, 5 cars/mo

$11.991 Month
How to cancel PerfExpert subscription ⁉️
4

In-App Purchases

$14.99

5 Extra Car Profiles

Add five car profiles to your account

Charts

Top Paid

📉 195-5

Sports

This app dropped -5 positions in Sports chart.

Last updated on September 23, 2026.

User reviews

Most RecentHighest RatedLowest Rated

Utilisation et suivi

Vraiment tres tres bien, appli très intéressante et pratique, permet de comparer les performance d’un véhicule avant et après modifications.
Suivi SAV très rapide et compétent
MT CHARVMT CHARV

Très satisfait des résultats

Développeur super pro et réactif, je recommande cette appli vraiment sérieuse
Théo04Théo04

Response from developer

Merci Théo pour votre retour et bons tests!

Custom Dyno

I put intake and catback exhaust. Shop charge me 500$ CA for a run before and after the modifications. For 20$ I can see a gain 15HP. Just WOW 👍
1975Nismo1975Nismo

Response from developer

Thanks for the great review! Running a before/after on your own mods, without booking dyno time, is exactly what we built PerfExpert for. Enjoy your car and happy tuning!

Super

Je viens d’effectuer trois test avec le boîtier RaceBox mini.
Très pertinent.
Ktm shunterKtm shunter

Response from developer

Merci beaucoup pour votre retour ! Content que le combo PerfExpert + RaceBox Mini vous donne satisfaction 👍

Não funciona

Infelizmente não funciona para carros elétricos
Mdca546Mdca546

Response from developer

Olá Mdca546, Obrigado pelo feedback. Infelizmente, o PerfExpert só funciona com veículos a combustão — isso está indicado na descrição do app na loja. O motivo: o app calcula a potência usando os regimes do motor (RPM) e as relações de transmissão, o que não se aplica aos motores elétricos. O modo "Timed Run" (tempos de aceleração) funciona com qualquer veículo, inclusive elétricos! Obrigado pela compreensão 🙏

See 94 more reviews

FAQ

What does PerfExpert do?

PerfExpert turns your smartphone into an onboard dyno and acceleration timer. It measures your car's engine power and torque with high accuracy, as well as acceleration times like 0-60 mph and quarter mile. It provides detailed reports with interactive charts for analysis.

How does the dyno test work without external sensors?

The app uses your phone's internal sensors, primarily the accelerometer, to capture acceleration data. By performing a full-throttle pull in a single gear on a flat, straight road, the app calculates power and torque. No connection to your car's OBD port or external sensors is needed for basic tests.

What are the key features of PerfExpert?

Key features include accurate horsepower and torque measurement with rev limiter detection and power loss modeling, timed run tests for various acceleration milestones, application of standard correction standards using real-time ambient conditions, and the ability to export results as data files or PNG images.

Is PerfExpert compatible with all cars?

The app is designed for manual gearboxes or automatic gearboxes with a manual mode. Dyno tests are not compatible with automatic gearboxes that lack a manual mode. You will need to create a car profile with key specifications like curb weight, tire size, and displacement.

What is the cost of PerfExpert?

The app is free to download and use for basic functions. However, advanced features or enhanced accuracy, such as rolling start dyno runs, may require in-app purchases or a Pro subscription, indicated by 'PerfExpert Pro su'.