# Shift Pro vs 24 CARFIX

The clearest difference is ads: 24 CARFIX at none against Shift Pro's shown. 24 CARFIX also leads on update cadence (every 3 weeks vs every 2 months). Shift Pro's advantage is iOS requirement (12.0 vs 15.6). On price, in-app purchases and device support there is nothing between them.

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

Shift Pro ships an update every 2 months, 24 CARFIX every 3 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | Shift Pro | 24 CARFIX |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Ad-supported | — |
| Size | 29 MB | 62 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [NK RACING PARTS COMPANY LIMITED](https://appshunter.io/developer/1500859331) | [Gramick House](https://appshunter.io/developer/1448807880) |

## What reviewers say

### Shift Pro

[App page](https://appshunter.io/ios/app/shift-pro-nk-racing/id1596897355)

This application allows users to tune the fuel distribution of injectors. It provides functions to display, configure, and log data, as well as open and save configuration files.

**Highlights:** Display fuel data, Configure fuel data, Open and save files, Data logging

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

**In-app purchases:** none


### 24 CARFIX

[App page](https://appshunter.io/ios/app/24-carfix-fixer/id1637625731)

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

**In-app purchases:** none


## Frequently asked questions

### Is Shift Pro free?

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

### Is 24 CARFIX free?

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

### Do Shift Pro or 24 CARFIX have ads?

Shift Pro shows ads; 24 CARFIX does not.

### Which is updated more often, Shift Pro or 24 CARFIX?

Shift Pro ships an update every 2 months, and 24 CARFIX every 3 weeks. Most recently, Shift Pro was updated on November 3, 2026 and 24 CARFIX 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.*