# PerfExpert vs Dyno Chart

The clearest difference is price: Dyno Chart at Free against PerfExpert's $8.99. Dyno Chart also leads on iOS requirement (7.0 vs 15.0). PerfExpert's advantage is review sentiment (63% vs 20%) and rating (3.7 vs 1.2). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

Dyno Chart is free to download; PerfExpert costs $8.99 up front. PerfExpert sells 8 in-app purchases, starting at $11.99 per month and Dyno Chart sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

PerfExpert holds the better App Store score, 3.7 against 1.2. Both are backed by a comparable volume of ratings — 12 and 6 respectively. Written reviews point the same way: 63% of PerfExpert's written reviews are positive against 20% of Dyno Chart's.

PerfExpert ships an update every 2 months, Dyno Chart every 3 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | PerfExpert | Dyno Chart |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| Rating | **[3.7 (12 ratings)](https://appshunter.io/ios/app/perfexpert-car-dyno-hp-test/id549390700/reviews)** | [1.2 (6 ratings)](https://appshunter.io/ios/app/dyno-chart-obd-ii-engine-performance-tool/id602676538/reviews) |
| Number of ratings | **12** | 6 |
| Positive reviews | **63.4% of reviews** | 20.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 30 MB | 9 MB |
| Requires iOS | 15.0 | **7.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Claude JOSEPH ANGELIQUE](https://appshunter.io/developer/549390703) | [K SOLUTION LLC](https://appshunter.io/developer/289670447) |

## What reviewers say

### PerfExpert

[App page](https://appshunter.io/ios/app/perfexpert-car-dyno-hp-test/id549390700)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PerfExpert Pro | $11.99 | per month |
| PerfExpert Pro Max | $24.99 | per month |
| PerfExpert Pro | $89.99 | per year |
| PerfExpert Pro Max | $199.99 | per year |
| 1 Extra Car Profile | $3.99 | one-time |
| 3 Extra Car Profiles | $9.99 | one-time |
| 5 Extra Car Profiles | $14.99 | one-time |
| External GPS Unlock | $17.99 | one-time |


### Dyno Chart

[App page](https://appshunter.io/ios/app/dyno-chart-obd-ii-engine-performance-tool/id602676538)

This tool analyzes your vehicle's engine performance, displaying max power and torque against RPM. It connects via an OBD II adapter to gather sensor data and generate detailed charts. Ensure compatibility before unlocking full features.

**Highlights:** Max power and torque vs RPM charts, OBD II sensor data collection, Vehicle compatibility check, ELM Wi-Fi/Bluetooth LE adapter support, In-app chart function unlock

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dyno Chart Unlock | $4.99 | one-time |


## Frequently asked questions

### Is PerfExpert free?

PerfExpert costs $8.99, and also offers in-app purchases.

### Is Dyno Chart free?

Dyno Chart is free to download, with in-app purchases available.

### Which has better reviews, PerfExpert or Dyno Chart?

PerfExpert is rated higher. PerfExpert averages 3.7 out of 5 from 12 ratings, while Dyno Chart averages 1.2 from 6 ratings.

### Do PerfExpert or Dyno Chart have ads?

Neither PerfExpert nor Dyno Chart shows ads.

### Which is updated more often, PerfExpert or Dyno Chart?

PerfExpert ships an update every 2 months, and Dyno Chart every 3 months. Most recently, PerfExpert was updated on October 26, 2026 and Dyno Chart on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*