# BlueDriver OBD2 Scan Tool vs Car Keys Express

The clearest difference is rating: BlueDriver OBD2 Scan Tool at 4.6 against Car Keys Express's 3.0. BlueDriver OBD2 Scan Tool also leads on update cadence (fortnightly vs every 4 months) and ratings volume (14K vs 23). Car Keys Express's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (10.0 vs 16.6). On price, review sentiment, ads and in-app purchases there is nothing between them.

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

BlueDriver OBD2 Scan Tool holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: BlueDriver OBD2 Scan Tool has 14K ratings behind it against 23, so its average is the more settled of the two. Written reviews point the same way: 57% of BlueDriver OBD2 Scan Tool's written reviews are positive against 50% of Car Keys Express's.

BlueDriver OBD2 Scan Tool ships an update fortnightly, Car Keys Express every 4 months. The most recent releases landed on October 22, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | BlueDriver OBD2 Scan Tool | Car Keys Express |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (14K ratings)](https://appshunter.io/ios/app/bluedriver-obd2-scan-tool/id445403397/reviews)** | [3.0 (23 ratings)](https://appshunter.io/ios/app/car-keys-express/id1499407690/reviews) |
| Number of ratings | **14K** | 23 |
| Positive reviews | **57.2% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 273 MB | 92 MB |
| Requires iOS | 16.6 | **10.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lemur Vehicle Monitors](https://appshunter.io/developer/445403400) | [Car Keys Express](https://appshunter.io/developer/1499407689) |

## 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


### Car Keys Express

[App page](https://appshunter.io/ios/app/car-keys-express/id1499407690)

Duplicate your car keys from home using your phone's camera. Save money by avoiding dealership prices and get keys cut and shipped to you. Easily pair new keys with a DIY installer for compatible vehicles.

**Highlights:** Duplicate car keys with phone camera, Save up to 75% off dealership prices, Keys cut and shipped, DIY key pairing with EZ Installer, Digital spare key storage, Military-grade data encryption

**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 Car Keys Express free?

Car Keys Express is free to download, with no in-app purchases.

### Which has better reviews, BlueDriver OBD2 Scan Tool or Car Keys Express?

BlueDriver OBD2 Scan Tool is rated higher. BlueDriver OBD2 Scan Tool averages 4.6 out of 5 from 14K ratings, while Car Keys Express averages 3.0 from 23 ratings.

### Do BlueDriver OBD2 Scan Tool or Car Keys Express have ads?

Neither BlueDriver OBD2 Scan Tool nor Car Keys Express shows ads.

### Which is updated more often, BlueDriver OBD2 Scan Tool or Car Keys Express?

BlueDriver OBD2 Scan Tool ships an update fortnightly, and Car Keys Express every 4 months. Most recently, BlueDriver OBD2 Scan Tool was updated on October 22, 2026 and Car Keys Express on October 12, 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.*