# NexzDAS vs ChkOBD OBD2 Analyzer

The clearest difference is rating: ChkOBD OBD2 Analyzer at 3.0 against NexzDAS's 2.1. NexzDAS's advantage is in-app purchases (none vs 4) and update cadence (every 10 days vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

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

ChkOBD OBD2 Analyzer holds the better App Store score, 3.0 against 2.1. Both are backed by a comparable volume of ratings — 13 and 4 respectively.

NexzDAS ships an update every 10 days, ChkOBD OBD2 Analyzer every 3 months. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | NexzDAS | ChkOBD OBD2 Analyzer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.1 (13 ratings)](https://appshunter.io/ios/app/nexzdas/id1462867675/reviews) | **[3.0 (4 ratings)](https://appshunter.io/ios/app/chkobd-obd2-analyzer/id1511585011/reviews)** |
| Number of ratings | **13** | 4 |
| Positive reviews | 11.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 797 MB | 63 MB |
| Requires iOS | 13.0 | 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

### NexzDAS

[App page](https://appshunter.io/ios/app/nexzdas/id1462867675)

This app provides comprehensive vehicle diagnostics, including full-system scanning and specialized functions like service resets and brake adjustments. It offers detailed diagnostic reports and an extensive online database for trouble code inquiries, all accessible via a portable Bluetooth device.

**Highlights:** Full-system vehicle diagnosis, OBD2 code reading and clearing, Specialized reset and calibration functions, Online trouble code inquiry, Bluetooth 4.2 connectivity, Professional diagnostic reports

**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 NexzDAS free?

NexzDAS 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, NexzDAS or ChkOBD OBD2 Analyzer?

ChkOBD OBD2 Analyzer is rated higher. NexzDAS averages 2.1 out of 5 from 13 ratings, while ChkOBD OBD2 Analyzer averages 3.0 from 4 ratings.

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

Neither NexzDAS nor ChkOBD OBD2 Analyzer shows ads.

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

NexzDAS ships an update every 10 days, and ChkOBD OBD2 Analyzer every 3 months. Most recently, NexzDAS was updated on October 24, 2026 and ChkOBD OBD2 Analyzer on October 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*