# TSD Rally Computer vs CarTest

The clearest difference is price: CarTest at Free against TSD Rally Computer's $24.99. CarTest also leads on review sentiment (44% vs 0%) and rating (4.2 vs 2.0). TSD Rally Computer's advantage is in-app purchases (none vs 3) and ads (none vs shown).

CarTest is free to download; TSD Rally Computer costs $24.99 up front. CarTest sells 3 in-app purchases, starting at $3.99 per 3 months. TSD Rally Computer asks for nothing beyond the download.

CarTest holds the better App Store score, 4.2 against 2.0. That said, the two scores are not equally well evidenced: CarTest has 13 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of TSD Rally Computer's written reviews are positive against 44% of CarTest's.

TSD Rally Computer ships an update every 3 months, CarTest monthly. The most recent releases landed on October 23, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | TSD Rally Computer | CarTest |
| --- | --- | --- |
| Price | $24.99 | **Free** |
| Rating | [2.0 (2 ratings)](https://appshunter.io/ios/app/tsd-rally-computer/id854295184/reviews) | **[4.2 (13 ratings)](https://appshunter.io/ios/app/cartest-performance-tester/id1534136951/reviews)** |
| Number of ratings | 2 | **13** |
| Positive reviews | 0.0% of reviews | **44.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 8 MB |
| Requires iOS | 18 | **15.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MSYapps](https://appshunter.io/developer/458482419) | [Takao Ichimura](https://appshunter.io/developer/1474061593) |

## What reviewers say

### TSD Rally Computer

[App page](https://appshunter.io/ios/app/tsd-rally-computer/id854295184)

This app assists in navigating traditional time-speed-distance automobile rallies that require manual odometer entry. It simplifies complex calculations, allowing drivers to accurately track their progress and maintain the required speeds. Features include customizable time and distance measurements, odometer calibration, and real-time speed comparisons.

**Highlights:** Manual odometer entry for TSD rallies, Odometer calibration, Customizable time and distance units, Real-time speed comparison with 'Speed Up'/'Slow Down' indicators, MFi controller support, Adjustable internal clock, Preselect next speed changes

**Features:** macOS Compatibility

**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 TSD Rally Computer free?

TSD Rally Computer costs $24.99, with no in-app purchases.

### Is CarTest free?

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

### Which has better reviews, TSD Rally Computer or CarTest?

CarTest is rated higher. TSD Rally Computer averages 2.0 out of 5 from 2 ratings, while CarTest averages 4.2 from 13 ratings.

### Do TSD Rally Computer or CarTest have ads?

CarTest shows ads; TSD Rally Computer does not.

### Which is updated more often, TSD Rally Computer or CarTest?

TSD Rally Computer ships an update every 3 months, and CarTest monthly. Most recently, TSD Rally Computer was updated on October 23, 2026 and CarTest on November 3, 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.*