# BlueDriver OBD2 Scan Tool vs GYEON App

The clearest difference is review sentiment: GYEON App at 100% against BlueDriver OBD2 Scan Tool's 58%. GYEON App also leads on rating (5.0 vs 4.6) and monetization model (free vs free with in-app purchases). BlueDriver OBD2 Scan Tool's advantage is update cadence (fortnightly vs every 3 months) and ratings volume (14K vs 1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

GYEON App holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: BlueDriver OBD2 Scan Tool has 14K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 58% of BlueDriver OBD2 Scan Tool's written reviews are positive against 100% of GYEON App's.

BlueDriver OBD2 Scan Tool ships an update fortnightly, GYEON App every 3 months. The most recent releases landed on November 1, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | BlueDriver OBD2 Scan Tool | GYEON App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (14K ratings)](https://appshunter.io/ios/app/bluedriver-obd2-scan-tool/id445403397/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/gyeon-app/id1545941404/reviews)** |
| Number of ratings | **14K** | 1 |
| Positive reviews | 58.4% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 273 MB | 46 MB |
| Requires iOS | 16.6 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Lemur Vehicle Monitors](https://appshunter.io/developer/445403400) | [Innovative Chemicals Pte. Ltd.](https://appshunter.io/developer/1481191397) |

## What reviewers say

### BlueDriver OBD2 Scan Tool

[App page](https://appshunter.io/ios/app/bluedriver-obd2-scan-tool/id445403397)

This app turns your smartphone into a powerful OBD2 scan tool. It allows you to read and clear trouble codes, view live data, and generate detailed repair reports for your vehicle. Understand your car's issues and make informed repair decisions.

**Highlights:** Read and clear trouble codes (Check Engine, ABS, etc.), Generate professional-grade Repair Reports, Access Mode 6 and smog readiness data, View live data with interactive graphing, Wireless Bluetooth scanning, Likely fixes explained in plain language

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Excellent diagnostic capabilities
- 💰 Great value for money
- 🔍 Detailed fault code information
- 📚 Helpful repair suggestions

**What reviewers complain about**

- 🐛 Occasional Bluetooth connectivity issues
- ⚠️ Limited support for some vehicle makes/models
- 🚫 Cannot read odometer information
- 🚫 Lack of advanced features for professional mechanics
- 🚫 No support for European vehicle VINs

**Reported bugs**

- Occasional app crashes
- Failure to detect vehicle faults in some cases
- Inability to update firmware on certain devices

**Requested features**

- Add support for more vehicle makes and models
- Improve Bluetooth stability and connectivity
- Implement odometer reading functionality
- Expand diagnostic capabilities to include more advanced features
- Add support for European vehicle VINs


### GYEON App

[App page](https://appshunter.io/ios/app/gyeon-app/id1545941404)

This app provides expert guidance on car detailing techniques, covering everything from proper washing and scratch removal to ceramic coating application and interior cleaning. Access exclusive tips and tricks to achieve professional results.

**Highlights:** Car washing techniques, Scratch removal guidance, Ceramic coating application, Interior cleaning tips, Exclusive how-to guides

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BlueDriver OBD2 Scan Tool free?

BlueDriver OBD2 Scan Tool is free to download, with no in-app purchases.

### Is GYEON App free?

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

### Which has better reviews, BlueDriver OBD2 Scan Tool or GYEON App?

GYEON App is rated higher. BlueDriver OBD2 Scan Tool averages 4.6 out of 5 from 14K ratings, while GYEON App averages 5.0 from 1 ratings.

### Do BlueDriver OBD2 Scan Tool or GYEON App have ads?

Neither BlueDriver OBD2 Scan Tool nor GYEON App shows ads.

### Which is updated more often, BlueDriver OBD2 Scan Tool or GYEON App?

BlueDriver OBD2 Scan Tool ships an update fortnightly, and GYEON App every 3 months. Most recently, BlueDriver OBD2 Scan Tool was updated on November 1, 2026 and GYEON App on October 19, 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.*