PerfExpert - Car Dyno HP Test

2.4.3

PerfExpert

2.48

836 reviews

10,000+
Downloads

$9.99

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

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About PerfExpert - Car Dyno HP Test

PerfExpert - Car Dyno HP Test is an auto & vehicles app developed by PerfExpert.

Download Statistics

PerfExpert - Car Dyno HP Test has been downloaded 26 thousand times. In the last 30 days, the app was downloaded 150 times. It is ranked #3 in auto & vehicles.

User Ratings

PerfExpert - Car Dyno HP Test is rated 2.48 out of 5 stars. The rating is based on 840 ratings.

App Information

PerfExpert - Car Dyno HP Test costs $9.99 to download. The APK download size is 5.42 MB. The latest version available is 2.4.3. The last update was on May 12, 2026.

Technical Requirements

PerfExpert - Car Dyno HP Test requires Android 4.3+ or higher. The app has a content rating of Everyone. The app has been available on Google Play July 2011.

Description

Know your car's true performance.

Turn your smartphone into a professional dyno. Measure real horsepower, torque, and acceleration times — within 2% of a chassis dynamometer. No OBD adapter, no cables, no expensive dyno sessions. Just mount your phone, accelerate, and get instant results.

Test and compare performance upgrades. Whether you're verifying an ECU remap, testing a new exhaust, or tracking the effect of a chiptuning session, PerfExpert gives you objective, independent data you can trust.

⸻

HOW IT WORKS

1️⃣ Create your car profile
Enter your vehicle's weight, tire sizes, and gear ratios. Not sure about a spec? The app guides you through every step.

2️⃣ Mount your phone & accelerate
Secure your phone in the car — no connection needed. Find a flat, straight road. Accelerate in one gear from low RPM to redline. That's it.

3️⃣ Get instant results
Power and torque curves appear immediately, just like on a real chassis dynamometer. Compare runs, track your modifications, and share results.

⸻

MEASUREMENT MODES

🔴 Dyno — Full power & torque curves vs. engine RPM. Advanced drivetrain loss model, rev limiter detection, and correction standards (DIN, SAE, JIS, CEE, ISO). Results as detailed as a professional chassis dyno.

🟢 Timed Run — Measure acceleration from a standing start. Speed intervals: 0-100, 100-200, 80-180, 60-160 km/h — 0-60, 60-120, 50-110, 40-100 mph. Distance: quarter mile, eighth mile (with trap speed), 60 ft. Max speed and peak acceleration on every run.

⸻

KEY FEATURES

- 2% accuracy compared to professional chassis dynamometers
- No OBD adapter or connection to your car required
- Works with your phone's built-in sensors
- External GPS available as an in-app option for pro-level precision: RaceBox Mini, Mini S, Micro (rolling start dyno, slope correction, free phone mounting)
- Power correction norms: DIN, SAE, JIS, CEE, ISO — using real-time atmospheric pressure, temperature, and humidity
- Interactive charts: pinch to zoom, tap for exact values
- Export results as PNG image, data file, or shareable web link
- Custom units: HP, CV, kW for power — Nm, ft·lb, mkg for torque — km/h, mph for speed
- Works on phones and tablets

⸻

WHO USES PERFEXPERT?

- Car enthusiasts who want to know their real HP and torque
- Tuners & mechanics verifying ECU remaps, chiptuning, intake, exhaust, or turbo upgrades
- Owners comparing before/after results of any modification
- Drivers timing their 0-60 mph or 0-100 km/h acceleration
- Anyone curious about their car's true performance

⸻

IMPORTANT NOTES

- Dyno mode requires a manual gearbox or an automatic with manual/sequential mode
- For best results, use a flat, straight, horizontal road with no traffic
- External GPS (available as an in-app option) unlocks additional features: rolling start dyno (no need to stop before measuring), automatic slope correction, and free phone orientation

⸻

Sample dyno and acceleration reports:
https://app.perfexpert-app.com/results/featured

FAQ:
https://www.perfexpert-app.com/faq

Join the PerfExpert community:
https://www.facebook.com/groups/perfexpert/

Recent changes:
Major update! 🚀

Brand new interface and powerful new features:
- Complete new design — faster, cleaner, more intuitive
- Slope correction — uphill/downhill effects (external GPS)
- New image export — optimized for social & print
- External GPS — one-time purchase or with Pro subscription
- Pro — custom logo, data export & cloud backup

2.4.2/2.4.3: peak labels, cross-device sync & orientation gauges fixed, older results restored, plus stability.

Built with your feedback. Thank you! ❤️

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More data about PerfExpert - Car Dyno HP Test

Price	$9.99
Total downloads	26 thousand
Recent downloads	150
Rating	2.48 based on 840 ratings
Ranking	Top ranked
Version	2.4.3
APK size	5.42 MB
Number of libraries	11
Designed for Android	4.3+
Suitable for	Everyone
Ads	NO ads

App Performance Report

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PerfExpert - Car Dyno HP Test compared with similar apps

Common keywords of similar apps

Results Perfexpert Acceleration Phone Correction Hp Chassis Power External Gps Measure Accelerate Start Km Mph Slope Export Https Test Accuracy Needed True Dynamometer Mount Instant Compare Upgrades Verifying Exhaust Chiptuning Gear Connection Flat Straight Dyno Torque Car Real Speed Obd Performance Professional Data Works App Features Pro Adapter Ecu

Keywords missing from this app

Scanner Engine Vehicle Time Support Bluetooth Fixd Vehicles Fuel Codes Sensor Display Charts Horsepower Monitoring Recent Realtime Diagnostics Tool Sensors Calculator Compatible Wizard Dashboard Emissions Adapters Elm Drive Dashboards Weight Gauges Plugin Check Auto Log

Google Play Rating history and histogram

Rating history

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Downloads over time

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PerfExpert - Car Dyno HP Test has been downloaded 26 thousand times. Over the past 30 days, it has been downloaded 150 times.

Changelog of PerfExpert - Car Dyno HP Test

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Developer information for PerfExpert

PerfExpert

contact@perfexpert-app.com

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Comments on PerfExpert - Car Dyno HP Test for Android

★★★★★ James Nichols · Jul 28, 2020

Tried this app because of the developers efforts. Wanted to see gearing and rpm calculation applied to an HP app. So far so good. The option for entering weather manually is good for stopping extra weather updates.

★★★★★ Gabriel Yeung · Apr 13, 2025

This app is pretty cool. For the several 1-star ratings or all the ratings that say this app does not work and the calibration does not work, you simply aren't doing it right; user error, as the developer keeps saying. I did the calibration of my phone sensors once, put in all my car's parameters according to Automobile Catalog, and did one Dino test. That first test seemed pretty accurate. My car is rated for 265 HP stock, and it read about 281 HP, which makes sense given the mods I have done.

★★★★★ Austin Germs · Feb 29, 2016

Really accurate Even on an uneven road I got really close to what the specs should be, great app

★★☆☆☆ Danny Sebahar · Jul 17, 2023

My car, a 2003 BMW 325i doesn't show up even though every other BMW from that year does. And when you do the Dino you can't have an Automatic transmission. My car is automatic, but you can select the gears it is in. I'm confused about what the gear minimum RPM us and the starting speed even though you start from a standstill. And my biggest confusion is: based on the formula for HP (HP=torque*rpm/5252) HP and Torque will always be the same at 5252 RPM, but the graphs never cross at 5252 RPM

★☆☆☆☆ J Cole · Feb 15, 2019

Keeps won't go past calibration mode. Literally did the same 9 steps 4 times. Wish I didn't waste $10 on it.

★★☆☆☆ Sean Sean · Oct 9, 2016

Gave different results on the same car every time I tested it. The same car, the same road, the same gear and acceleration and weather, difference in hp mainly whiles torque was more or less ok

Google Play Rankings for PerfExpert - Car Dyno HP Test

Top rankings

Rank	Country	Category	List
3	France	Auto & Vehicles	Top Paid
153	France	Overall	Top Paid
16	Germany	Auto & Vehicles	Top Paid
14	Indonesia	Auto & Vehicles	Top Paid
14	India	Auto & Vehicles	Top Paid
14	Mexico	Auto & Vehicles	Top Paid
14	Saudi Arabia	Auto & Vehicles	Top Paid
150	France	Applications	Top Paid
15	Austria	Auto & Vehicles	Top Paid
15	Belgium	Auto & Vehicles	Top Paid

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Ranking history in France

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