PerfExpert - Car Dyno HP Test

Name: PerfExpert - Car Dyno HP Test
Price: 9.99 USD
Rating: 2.4814816 (856 reviews)
Author: PerfExpert

By: PerfExpert

Measure your car's real HP & torque with 2% dyno accuracy. No OBD needed!

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Features & Capabilities

PerfExpert - Car Onboard Dyno is a powerful Chrome extension that transforms your smartphone into a precise dyno tool to measure your car's horsepower, torque, and acceleration times within 2% accuracy. By creating a detailed vehicle profile and utilizing your phone's internal sensors, PerfExpert provides instant, independent, and objective performance results without the need for expensive chassis dyno testing.

Users can analyze engine power curves and acceleration charts, compare different tunings or ECU maps, and export detailed reports with interactive charts. Supporting multiple unit systems and correction standards like DIN, SAE, JIS, and more, PerfExpert ensures accuracy under varying atmospheric conditions. It is ideal for enthusiasts seeking an affordable way to monitor and optimize vehicle performance using only their phone and a flat, straight road.

User Growth & Download Statistics

App

By:

Downloads:

Rating:

Version:

2.4.3 Last updated: 2026-05-12

Version code:

24410

Creation date:

2011-07-03

Publisher country:

Permissions:

android.permission.ACCESS_COARSE_LOCATION Very high risk
android.permission.ACCESS_FINE_LOCATION Very high risk
android.permission.BLUETOOTH_CONNECT Moderate risk
android.permission.BLUETOOTH_SCAN Moderate risk
android.permission.HIGH_SAMPLING_RATE_SENSORS Moderate risk
android.permission.ACCESS_ADSERVICES_AD_ID Low risk
android.permission.ACCESS_ADSERVICES_ATTRIBUTION Low risk
android.permission.INTERNET Low risk
android.permission.POST_NOTIFICATIONS Low risk
android.permission.RECEIVE_BOOT_COMPLETED Low risk

Size:

8.70MB

Price:

9.99

Email:

co*****@perfexpert-app.com

URLs:

Website ,Privacy policy

Full description:

Source:

Google Play Store

Data ingested on:

2026-06-25

Compare stats and ranking:

Ranking

# 375,630 ▼ 441

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Android app. Please use these information below to contact the Android app developer.

Developed by:

PerfExpert

Google Play Store

https://play.google.com/store/apps/details?id=com.perfexpert

Email:

co*****@perfexpert-app.com

Website:

https://www.perfexpert-app.com

User Reviews

Users appreciate the app's detailed configuration options and potential for accurate dyno measurements when correctly calibrated. However, common issues include frequent crashes, difficulty completing calibration and runs, and inconsistent or inaccurate results especially at higher power levels. Many users report poor or no customer support and frustrations with app complexity and missing vehicle support. While some find it functional after effort, the overall experience is marred by technical instability and usability challenges.

Pros

The app provides very detailed and technical configuration options for various car models, which some users find attractive.
When calibration and settings are done correctly, the app can deliver accurate horsepower and torque measurements comparable to a real dyno.
Manual entry of weather data is available, helping to reduce unnecessary automatic updates.
The calibration process, although sometimes requiring multiple attempts, is considered manageable by some users.
The app supports custom gear ratios and vehicle parameters, offering a comprehensive dyno simulation experience.

Cons

The app frequently crashes and often fails to complete calibration or dyno runs, causing user frustration.
Results are reported as wildly inconsistent and inaccurate, especially when measuring horsepower over 400bhp, with values jumping significantly between runs.
Customer support is largely unresponsive, sometimes taking months to reply or failing to reply at all, leading to poor user assistance.
The app lacks support for certain cars or drivetrain configurations, such as automatic transmissions or specific gear inputs (e.g., 5th gear), limiting usability.
The calibration instructions and app interface lack clarity, making it difficult for users to perform correct setup; the app is described as temperamental and overly complicated for first-time users.

Recent reviews

App is horrible doesn't work correctly at all waste 15$ . Wish get refund tryed over 10 times get work never worked correctly

za*****, 2024-12-08

Wildly inconsistent and inaccurate results. Hp values jump around 120 hp doing a pass at the spot under the same conditions. Phone is very secure and calibrated. All car settings completed correctly. Simply not trustworthy even as a relative gains because it's so inconsistent. EDIT: yeah you are FOR SURE wrong. All instructions were carefully followed to the t. Typical greedy behavior, won't admit flaws, probably why you don't offer a trial version of the app. You know no one will buy it then.