# Crewchief Auto vs J1939FaultCode

The clearest difference is in-app purchases: Crewchief Auto at none against J1939FaultCode's 1. Crewchief Auto also leads on ads (none vs shown) and device support (3 vs 1). On price, update cadence and iOS requirement there is nothing between them.

Both are free to download. J1939FaultCode sells 1 one-off in-app purchase. Crewchief Auto asks for nothing beyond the download.

Crewchief Auto ships an update every 3 weeks, J1939FaultCode fortnightly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Crewchief Auto | J1939FaultCode |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/crewchief-auto/id6760673109/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Freemium | — |
| Size | 35 MB | 14 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [David Justice](https://appshunter.io/developer/1726288930) | [洋 刘](https://appshunter.io/developer/6775317751) |

## What reviewers say

### Crewchief Auto

[App page](https://appshunter.io/ios/app/crewchief-auto/id6760673109)

Manage your vehicles with this app. Read diagnostic trouble codes, view live engine data, and get AI-powered reports with repair guidance and cost estimates. Track maintenance, store records, and set reminders for unlimited vehicles.

**Highlights:** Read and clear diagnostic trouble codes (DTCs), View live engine data, AI diagnostic reports with repair guidance, Track unlimited vehicle types, Store photos, documents, and service records, Set maintenance reminders

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

**In-app purchases:** none


### J1939FaultCode

[App page](https://appshunter.io/ios/app/j1939faultcode/id6778431735)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| J1939 Pro | $2.99 | one-time |


## Frequently asked questions

### Is Crewchief Auto free?

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

### Is J1939FaultCode free?

J1939FaultCode is free to download, with in-app purchases available.

### Do Crewchief Auto or J1939FaultCode have ads?

J1939FaultCode shows ads; Crewchief Auto does not.

### Which is updated more often, Crewchief Auto or J1939FaultCode?

Crewchief Auto ships an update every 3 weeks, and J1939FaultCode fortnightly. Most recently, Crewchief Auto was updated on October 31, 2026 and J1939FaultCode on November 5, 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.*