# BlueDriver OBD2 Scan Tool vs ARMS (Mobile)

The clearest difference is monetization model: ARMS (Mobile) at free against BlueDriver OBD2 Scan Tool's free with in-app purchases. BlueDriver OBD2 Scan Tool's advantage is ratings volume (14K vs 14). On price, rating, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.6 for BlueDriver OBD2 Scan Tool against 4.7 for ARMS (Mobile). That said, the two scores are not equally well evidenced: BlueDriver OBD2 Scan Tool has 14K ratings behind it against 14, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | BlueDriver OBD2 Scan Tool | ARMS (Mobile) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (14K ratings)](https://appshunter.io/ios/app/bluedriver-obd2-scan-tool/id445403397/reviews) | **[4.7 (14 ratings)](https://appshunter.io/ios/app/arms-mobile/id1615127530/reviews)** |
| Number of ratings | **14K** | 14 |
| Positive reviews | 58.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 273 MB | 122 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Lemur Vehicle Monitors](https://appshunter.io/developer/445403400) | [CEDAR AI, INC.](https://appshunter.io/developer/1615127532) |

## 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


### ARMS (Mobile)

[App page](https://appshunter.io/ios/app/arms-mobile/id1615127530)

This app streamlines rail yard operations for switching crews, supporting transload and intermodal workflows. It allows for managing car movements, inventory, and switch requests, while also facilitating truck check-ins and container tracking.

**Highlights:** Manage rail car movements and inventory, Process transload workflows for rail and trucks, Track intermodal container movements, Receive and complete switch requests, Barcode/QR code scanning for inventory, Generate shipping paperwork

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

**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 ARMS (Mobile) free?

ARMS (Mobile) is free to download, with no in-app purchases.

### Which has better reviews, BlueDriver OBD2 Scan Tool or ARMS (Mobile)?

ARMS (Mobile) is rated higher. BlueDriver OBD2 Scan Tool averages 4.6 out of 5 from 14K ratings, while ARMS (Mobile) averages 4.7 from 14 ratings.

### Do BlueDriver OBD2 Scan Tool or ARMS (Mobile) have ads?

Neither BlueDriver OBD2 Scan Tool nor ARMS (Mobile) shows ads.

### Which is updated more often, BlueDriver OBD2 Scan Tool or ARMS (Mobile)?

BlueDriver OBD2 Scan Tool ships an update fortnightly, and ARMS (Mobile) fortnightly. Most recently, BlueDriver OBD2 Scan Tool was updated on October 30, 2026 and ARMS (Mobile) on October 24, 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.*