# Fault Code Library vs Auto

The clearest difference is price: Auto at Free against Fault Code Library's $1.99. Auto also leads on update cadence (every 4 months vs every 17 months) and iOS requirement (13.0 vs 15.0). Fault Code Library's advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

Auto is free to download; Fault Code Library costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Fault Code Library ships an update every 17 months, Auto every 4 months. The most recent releases landed on September 21, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Fault Code Library | Auto |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[1.5 (2 ratings)](https://appshunter.io/ios/app/auto-datanet/id6450255104/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 17 months | **Every 4 months** |
| Monetization | — | Ad-supported |
| Size | 68 MB | 7 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HITS-UK](https://appshunter.io/developer/548316663) | [Automotive Data Ltd](https://appshunter.io/developer/1685201965) |

## What reviewers say

### Fault Code Library

[App page](https://appshunter.io/ios/app/fault-code-library/id1575364591)

**Features:** Vision Pro support

**In-app purchases:** none


### Auto

[App page](https://appshunter.io/ios/app/auto-datanet/id6450255104)

Access comprehensive technical data for over 300 car brands, including models, generations, and modifications. The database is updated daily and features images for most entries. Available in 14 languages, it's perfect for car enthusiasts.

**Highlights:** Extensive car brand database, Detailed model and modification data, Daily database updates, Images for generations and modifications, Multi-language support (14 languages)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fault Code Library free?

Fault Code Library costs $1.99, with no in-app purchases.

### Is Auto free?

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

### Do Fault Code Library or Auto have ads?

Auto shows ads; Fault Code Library does not.

### Which is updated more often, Fault Code Library or Auto?

Fault Code Library ships an update every 17 months, and Auto every 4 months. Most recently, Fault Code Library was updated on September 21, 2026 and Auto on September 22, 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.*