# Racing Diffs vs Toolbox TREMEC U.S.

The clearest difference is rating: Toolbox TREMEC U.S. at 3.3 against Racing Diffs's 2.5. On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Toolbox TREMEC U.S. holds the better App Store score, 3.3 against 2.5. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

## The numbers

| Metric | Racing Diffs | Toolbox TREMEC U.S. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (2 ratings)](https://appshunter.io/ios/app/racing-diffs-gear-ratio/id1554897307/reviews) | **[3.3 (3 ratings)](https://appshunter.io/ios/app/toolbox-tremec-us/id6466313595/reviews)** |
| Number of ratings | 2 | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Monetization | Free | Free |
| Size | 6 MB | 6 MB |
| Requires iOS | 14.4 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Imperio](https://appshunter.io/developer/521569345) | [Grupo Kuo, S.A.B. de C.V.](https://appshunter.io/developer/1491302641) |

## What reviewers say

### Racing Diffs

[App page](https://appshunter.io/ios/app/racing-diffs-gear-ratio/id1554897307)

Calculate your vehicle's top speed for each gear using transmission ratios, differential gear ratio, and rev limit. Optimize your car's gear ratio for track performance or drag racing, choosing between kmh and mph units.

**Highlights:** Top speed calculation per gear, Input tire dimensions, Input transmission gear ratios, Input final drive ratio, Input rev limit, Supports kmh and mph

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

**In-app purchases:** none


### Toolbox TREMEC U.S.

[App page](https://appshunter.io/ios/app/toolbox-tremec-us/id6466313595)

This application simplifies driveline setup and predicts performance changes from gear ratios and tire size. It offers tools to calculate vehicle speed and RPM variables, aiding in rig planning and performance expectation.

**Highlights:** Driveline Angle Finder, RPM Calculator, Tire Size Calculator, Vehicle Speed Calculator, Performance prediction

**In-app purchases:** none


## Frequently asked questions

### Is Racing Diffs free?

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

### Is Toolbox TREMEC U.S. free?

Toolbox TREMEC U.S. is free to download, with no in-app purchases.

### Which has better reviews, Racing Diffs or Toolbox TREMEC U.S.?

Toolbox TREMEC U.S. is rated higher. Racing Diffs averages 2.5 out of 5 from 2 ratings, while Toolbox TREMEC U.S. averages 3.3 from 3 ratings.

### Do Racing Diffs or Toolbox TREMEC U.S. have ads?

Neither Racing Diffs nor Toolbox TREMEC U.S. shows ads.

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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.*