# NexzScan vs ChkOBD OBD2 Analyzer

The clearest difference is rating: ChkOBD OBD2 Analyzer at 3.0 against NexzScan's 2.1. ChkOBD OBD2 Analyzer also leads on iOS requirement (13.0 vs 15.6). NexzScan's advantage is in-app purchases (none vs 4) and update cadence (every 3 weeks vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. ChkOBD OBD2 Analyzer sells 4 in-app purchases, starting at $4.99 per month. NexzScan asks for nothing beyond the download.

ChkOBD OBD2 Analyzer holds the better App Store score, 3.0 against 2.1. That said, the two scores are not equally well evidenced: NexzScan has 27 ratings behind it against 4, so its average is the more settled of the two.

NexzScan ships an update every 3 weeks, ChkOBD OBD2 Analyzer every 3 months. The most recent releases landed on October 25, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | NexzScan | ChkOBD OBD2 Analyzer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.1 (27 ratings)](https://appshunter.io/ios/app/nexzscan/id1450589621/reviews) | **[3.0 (4 ratings)](https://appshunter.io/ios/app/chkobd-obd2-analyzer/id1511585011/reviews)** |
| Number of ratings | **27** | 4 |
| Positive reviews | 7.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 142 MB | 63 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [美泉 黄](https://appshunter.io/developer/1465544231) | [Check On-Board Diagnostics LLC](https://appshunter.io/developer/1511585010) |

## What reviewers say

### NexzScan

[App page](https://appshunter.io/ios/app/nexzscan/id1450589621)

This tool helps diagnose car engine issues by connecting to your vehicle's OBD port. It provides detailed reports on error codes, their causes, and live data, making car repair more efficient and accessible. The app offers a user-friendly interface and comprehensive vehicle support.

**Highlights:** Read and clear engine codes, Detailed diagnosis reports, Customized live data display, Powerful DTC definition database, One-key app updates, Bluetooth 4.2 connection

**Features:** macOS Compatibility

**In-app purchases:** none


### ChkOBD OBD2 Analyzer

[App page](https://appshunter.io/ios/app/chkobd-obd2-analyzer/id1511585011)

Connect your iPhone or iPad to your car's engine to view vital data. Access basic engine values for free, with in-app purchases for advanced diagnostics, smog check readiness, VIN analysis, and error decoding.

**Highlights:** View engine values, In-app purchase for advanced data, Smog Check Assistant, VIN Analyzer, Error Decoder and Reset, Bluetooth adapter compatibility check

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Smog Check Assistant | $4.99 | per month |
| VIN Analyzer | $1.99 | one-time |
| Error Analyzer | $2.99 | one-time |
| Advance Engine Values | $4.99 | one-time |


## Frequently asked questions

### Is NexzScan free?

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

### Is ChkOBD OBD2 Analyzer free?

ChkOBD OBD2 Analyzer is free to download, with in-app purchases available.

### Which has better reviews, NexzScan or ChkOBD OBD2 Analyzer?

ChkOBD OBD2 Analyzer is rated higher. NexzScan averages 2.1 out of 5 from 27 ratings, while ChkOBD OBD2 Analyzer averages 3.0 from 4 ratings.

### Do NexzScan or ChkOBD OBD2 Analyzer have ads?

Neither NexzScan nor ChkOBD OBD2 Analyzer shows ads.

### Which is updated more often, NexzScan or ChkOBD OBD2 Analyzer?

NexzScan ships an update every 3 weeks, and ChkOBD OBD2 Analyzer every 3 months. Most recently, NexzScan was updated on October 25, 2026 and ChkOBD OBD2 Analyzer on October 13, 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.*