# iTSX vs CarTest

The clearest difference is rating: CarTest at 4.2 against iTSX's 2.3. CarTest also leads on review sentiment (44% vs 24%) and update cadence (monthly vs every 2 months). iTSX's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. CarTest sells 3 in-app purchases, starting at $3.99 per 3 months. iTSX asks for nothing beyond the download.

CarTest holds the better App Store score, 4.2 against 2.3. Both are backed by a comparable volume of ratings — 45 and 13 respectively. Written reviews point the same way: 24% of iTSX's written reviews are positive against 44% of CarTest's.

iTSX ships an update every 2 months, CarTest monthly. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | iTSX | CarTest |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (45 ratings)](https://appshunter.io/ios/app/itsx/id461100848/reviews) | **[4.2 (13 ratings)](https://appshunter.io/ios/app/cartest-performance-tester/id1534136951/reviews)** |
| Number of ratings | **45** | 13 |
| Positive reviews | 24.5% of reviews | **44.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 35 MB | 8 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SCT Performance](https://appshunter.io/developer/461100851) | [Takao Ichimura](https://appshunter.io/developer/1474061593) |

## What reviewers say

### iTSX

[App page](https://appshunter.io/ios/app/itsx/id461100848)

Tune and monitor your vehicle's performance using your iPhone or iPad. This app requires a specific wireless OBD-II interface to adjust engine parameters, view real-time data, and run performance tests. It also allows for reading and clearing diagnostic trouble codes.

**Highlights:** Vehicle programming for performance gains, Pre-loaded dyno-proven tunes, Adjustable speed limiter, Virtual gauges and data monitoring, Record and review data logs, Performance tests (0-60, 1/4 mile), Read and clear diagnostic trouble codes

**In-app purchases:** none


### CarTest

[App page](https://appshunter.io/ios/app/cartest-performance-tester/id1534136951)

Measure your vehicle's acceleration performance with this tool. Easily track times like 0-60 mph or 0-1/4 mile. Useful for performance testing and safe driving awareness on public roads.

**Highlights:** Measure 0-60 mph and 0-1/4 mile times, Track acceleration on public roads, Repeatable measurements with Start/Sensing, Countdown start with false start detection, View and share previous results, Selectable speed units (km/h or mph)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Feature enhancements | $3.99 | per 3 months |
| Feature enhancements | $5.99 | per year |
| Feature enhancements | $9.99 | one-time |


## Frequently asked questions

### Is iTSX free?

iTSX is free to download, with no in-app purchases.

### Is CarTest free?

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

### Which has better reviews, iTSX or CarTest?

CarTest is rated higher. iTSX averages 2.3 out of 5 from 45 ratings, while CarTest averages 4.2 from 13 ratings.

### Do iTSX or CarTest have ads?

CarTest shows ads; iTSX does not.

### Which is updated more often, iTSX or CarTest?

iTSX ships an update every 2 months, and CarTest monthly. Most recently, iTSX was updated on October 21, 2026 and CarTest on October 25, 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.*