# PerfExpert vs Log Dyno

The clearest difference is review sentiment: PerfExpert at 63% against Log Dyno's 15%. PerfExpert also leads on price ($8.99 vs $13.99) and rating (3.7 vs 3.4). Log Dyno's advantage is in-app purchases (none vs 8) and iOS requirement (9.0 vs 15.0). On ratings volume, ads and device support there is nothing between them.

PerfExpert costs $8.99 and Log Dyno $13.99 up front. PerfExpert sells 8 in-app purchases, starting at $11.99 per month. Log Dyno asks for nothing beyond the download.

PerfExpert holds the better App Store score, 3.7 against 3.4. Both are backed by a comparable volume of ratings — 12 and 10 respectively. Written reviews point the same way: 63% of PerfExpert's written reviews are positive against 15% of Log Dyno's.

PerfExpert ships an update every 2 months, Log Dyno every 4 months. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | PerfExpert | Log Dyno |
| --- | --- | --- |
| Price | **$8.99** | $13.99 |
| Rating | **[3.7 (12 ratings)](https://appshunter.io/ios/app/perfexpert-car-dyno-hp-test/id549390700/reviews)** | [3.4 (10 ratings)](https://appshunter.io/ios/app/log-dyno/id1453544823/reviews) |
| Number of ratings | **12** | 10 |
| Positive reviews | **63.4% of reviews** | 15.4% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 30 MB | 128 MB |
| Requires iOS | 15.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Claude JOSEPH ANGELIQUE](https://appshunter.io/developer/549390703) | [Adam Keninger](https://appshunter.io/developer/966549024) |

## 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 | $22.99 | one-time |


### Log Dyno

[App page](https://appshunter.io/ios/app/log-dyno/id1453544823)

This app analyzes your car's datalog files to measure torque and horsepower using your mobile device. It provides detailed analysis, recommends optimal gear shifts, and allows comparison of multiple measurements.

**Highlights:** Measure torque and horsepower from datalogs, Virtual dyno analysis, Optimal gear shift recommendations, Compare multiple measurements, Supports various datalog file formats, Customizable vehicle data input

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

**In-app purchases:** none


## Frequently asked questions

### Is PerfExpert free?

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

### Is Log Dyno free?

Log Dyno costs $13.99, with no in-app purchases.

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

PerfExpert is rated higher. PerfExpert averages 3.7 out of 5 from 12 ratings, while Log Dyno averages 3.4 from 10 ratings.

### Do PerfExpert or Log Dyno have ads?

Neither PerfExpert nor Log Dyno shows ads.

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

PerfExpert ships an update every 2 months, and Log Dyno every 4 months. Most recently, PerfExpert was updated on November 1, 2026 and Log Dyno 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.*