PerfExpert - Car Dyno HP Test lets you truly measure your car's performance. With this app, you can turn your smartphone into a professional dyno, allowing you to track real horsepower and torque. It achieves these measurements within 2% accuracy of a chassis dynamometer, so you can trust the results. There’s no need for an OBD adapter, cables, or costly dyno sessions. Simply mount your phone, accelerate, and you’ll receive instant results.

This app is perfect for testing and comparing performance upgrades. Whether you're verifying an ECU remap, testing a new exhaust system, or tracking the effects of a chiptuning session, PerfExpert provides objective data you can depend on.

Getting started is simple. First, create your car profile by entering details like vehicle weight, tire sizes, and gear ratios. If you’re unsure about any specifics, the app guides you at every step. Next, secure your phone in your car—there’s no connection required. Just find a flat straight road, accelerate in one gear from low RPM to redline, and that's it!

Once you finish, the app instantly displays power and torque curves, just like a real chassis dynamometer. You can easily compare runs, monitor your modifications, and even share your results.

PerfExpert offers different measurement modes to cater to your needs. In Dyno mode, you can view full power and torque curves compared to engine RPM. It incorporates an advanced drivetrain loss model and rev limiter detection for accurate reporting. Using power correction standards like DIN, SAE, JIS, CEE, and ISO, you’ll see results detailed enough to match those of a professional chassis dynamo.

In Timed Run mode, you can measure acceleration from a standing start. It covers various speed intervals, allowing you to time your 0-60 mph or 0-100 km/h acceleration. You can also measure distances for a quarter mile, eighth mile (with trap speed), and more. Every run shows maximum speed and peak acceleration.

Key features of PerfExpert include its impressive 2% accuracy compared to professional chassis dynamometers and the ability to work with your phone's built-in sensors. If you're seeking even more precision, PerfExpert allows external GPS integration as an in-app option, compatible with devices like RaceBox Mini. This feature enables a rolling start dyno option, allowing for measurements without stopping beforehand.

Thanks to power correction norms, you’ll receive results based on real-time atmospheric pressure, temperature, and humidity. The app provides interactive charts where you can pinch to zoom and tap for exact values. You can also export your results as a PNG image or get a shareable web link. For those who want to track their values in different metrics, custom units for power (HP, CV, kW) and torque (Nm, ft-lb, mkg) are available, along with speed in km/h or mph.

For users who want even more, there's the option to subscribe to PerfExpert Pro. This subscription gives you a custom logo on your results, cloud backup of your findings, and the ability to export data as CSV files.

PerfExpert is designed for a range of users. Car enthusiasts will appreciate knowing their real horsepower and torque. Tuners and mechanics can verify ECU remaps, chiptuning, or upgrades to intake, exhaust, and turbos. Owners can compare the results of any modification, while drivers will enjoy timing their acceleration metrics. Essentially, PerfExpert benefits anyone curious about their car's true performance.

It's important to keep in mind that Dyno mode requires a manual gearbox or an automatic with manual/sequential mode for the best results. Always use a flat, straight, horizontal road with no traffic for accurate measurements. Using an external GPS device unlocks even more features, like the rolling start dyno, which eliminates the need to stop before taking measurements.

With PerfExpert, discovering your car's performance is straightforward and reliable. Whether you are a high-performance car enthusiast or simply curious about your vehicle, this app provides the tools you need to gain insights into your car's capabilities.