# OBD2 Expert vs NexzScan

The clearest difference is rating: OBD2 Expert at 4.1 against NexzScan's 2.1. OBD2 Expert also leads on ratings volume (725 vs 27) and iOS requirement (9.3 vs 15.6). NexzScan's advantage is in-app purchases (none vs 4) and update cadence (every 3 weeks vs every 2 months). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. OBD2 Expert sells 4 one-off in-app purchases. NexzScan asks for nothing beyond the download.

OBD2 Expert holds the better App Store score, 4.1 against 2.1. That said, the two scores are not equally well evidenced: OBD2 Expert has 725 ratings behind it against 27, so its average is the more settled of the two. Written reviews split almost evenly too, at 8% and 7% positive.

OBD2 Expert ships an update every 2 months, NexzScan every 3 weeks. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | OBD2 Expert | NexzScan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (725 ratings)](https://appshunter.io/ios/app/obd2-expert/id1142156521/reviews)** | [2.1 (27 ratings)](https://appshunter.io/ios/app/nexzscan/id1450589621/reviews) |
| Number of ratings | **725** | 27 |
| Positive reviews | **8.0% of reviews** | 7.1% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 17 MB | 141 MB |
| Requires iOS | **9.3** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Michael Lauer](https://appshunter.io/developer/300205595) | [美泉 黄](https://appshunter.io/developer/1465544231) |

## What reviewers say

### OBD2 Expert

[App page](https://appshunter.io/ios/app/obd2-expert/id1142156521)

Diagnose and monitor your vehicle's health by connecting an OBD2 adapter. View sensor data, read and reset trouble codes, and analyze diagnostic information. Developers can use it as a hardware simulator or protocol bridge.

**Highlights:** Vehicle diagnostics and monitoring, Read and reset diagnostic trouble codes (DTC), View current sensor data, Analyze Mode 6 diagnostics, Load vehicle status files for testing, Share vehicle status data, BLE/WiFi OBD2 ScanTool simulator for developers, OBD2 protocol communication bridge

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Operation Mode Bridge | $0.99 | one-time |
| Operation Mode ScanTool | $2.99 | one-time |
| Operation Mode Simulator | $4.99 | one-time |
| All Features | $5.99 | one-time |

**What reviewers like**

- 👍 Works well
- 🚀 Fast and responsive
- 💡 Useful features

**What reviewers complain about**

- 🐛 Crashes frequently
- 🔒 Requires payment to unlock core functionality
- ⚠️ Doesn't detect/connect to OBD2 adapter
- 🤖 Lacks instructions/documentation
- 💸 Overpriced for limited functionality

**Reported bugs**

- Freezes during use
- Fails to recognize compatible OBD2 adapters
- Inaccurate vehicle information detection

**Requested features**

- Add support for more vehicle models
- Implement live data monitoring
- Include ability to clear diagnostic codes
- Provide free trial period to test functionality


### 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


## Frequently asked questions

### Is OBD2 Expert free?

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

### Is NexzScan free?

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

### Which has better reviews, OBD2 Expert or NexzScan?

OBD2 Expert is rated higher. OBD2 Expert averages 4.1 out of 5 from 725 ratings, while NexzScan averages 2.1 from 27 ratings.

### Do OBD2 Expert or NexzScan have ads?

Neither OBD2 Expert nor NexzScan shows ads.

### Which is updated more often, OBD2 Expert or NexzScan?

OBD2 Expert ships an update every 2 months, and NexzScan every 3 weeks. Most recently, OBD2 Expert was updated on October 13, 2026 and NexzScan on October 6, 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.*