# Diag vs VIN decoder & VIN code scanner

The clearest difference is review sentiment: VIN decoder & VIN code scanner at 100% against Diag's 33%. VIN decoder & VIN code scanner also leads on ratings volume (112 vs 3) and update cadence (every 3 weeks vs every 2 months). Diag's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. VIN decoder & VIN code scanner sells 2 in-app purchases, starting at $4.99 per month. Diag asks for nothing beyond the download.

Diag holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: VIN decoder & VIN code scanner has 112 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 33% of Diag's written reviews are positive against 100% of VIN decoder & VIN code scanner's, so the app with the better star average is not the one people write more warmly about.

Diag ships an update every 2 months, VIN decoder & VIN code scanner every 3 weeks. The most recent releases landed on September 22, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Diag | VIN decoder & VIN code scanner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/diag-china/id1434670517/reviews)** | [4.7 (112 ratings)](https://appshunter.io/ios/app/vin-decoder-and-vin-code-scanner/id6446398420/reviews) |
| Number of ratings | 3 | **112** |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 245 MB | 39 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Autel Intelligent Technology Co., Ltd.](https://appshunter.io/developer/770747094) | [Vitaliy Mischenko](https://appshunter.io/developer/1661516195) |

## What reviewers say

### Diag

[App page](https://appshunter.io/ios/app/diag-china/id1434670517)

This diagnostic software package works with the MaxiAP200 to provide diagnostic functions for China vehicles. It offers a comprehensive suite of tools for vehicle maintenance and troubleshooting.

**Highlights:** Vehicle diagnostics, China vehicle support, Requires MaxiAP200, Maintenance tools, Troubleshooting functions

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

**In-app purchases:** none


### VIN decoder & VIN code scanner

[App page](https://appshunter.io/ios/app/vin-decoder-and-vin-code-scanner/id6446398420)

Instantly decode any vehicle's VIN with this app. It offers both manual input and a VIN scanner for quick, accurate vehicle information, including auction history and average pricing.

**Highlights:** VIN code decoding, Real-time VIN scanner, VIN code recognition from text, Auction participation check, Average vehicle price estimation, VIN code validation

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access for a month | $4.99 | per month |
| Premium Access for a year | $49.99 | per year |


## Frequently asked questions

### Is Diag free?

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

### Is VIN decoder & VIN code scanner free?

VIN decoder & VIN code scanner is free to download, with in-app purchases available.

### Which has better reviews, Diag or VIN decoder & VIN code scanner?

Diag is rated higher. Diag averages 5.0 out of 5 from 3 ratings, while VIN decoder & VIN code scanner averages 4.7 from 112 ratings.

### Do Diag or VIN decoder & VIN code scanner have ads?

VIN decoder & VIN code scanner shows ads; Diag does not.

### Which is updated more often, Diag or VIN decoder & VIN code scanner?

Diag ships an update every 2 months, and VIN decoder & VIN code scanner every 3 weeks. Most recently, Diag was updated on September 22, 2026 and VIN decoder & VIN code scanner on September 16, 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.*