# BlueDriver OBD2 Scan Tool vs UMA Tune

The clearest difference is rating: BlueDriver OBD2 Scan Tool at 4.6 against UMA Tune's 3.6. BlueDriver OBD2 Scan Tool also leads on in-app purchases (none vs 2) and review sentiment (58% vs 26%). UMA Tune's advantage is iOS requirement (10.0 vs 16.6). On price, update cadence, ads and monetization model there is nothing between them.

Both are free to download. UMA Tune sells 2 one-off in-app purchases. BlueDriver OBD2 Scan Tool asks for nothing beyond the download.

BlueDriver OBD2 Scan Tool holds the better App Store score, 4.6 against 3.6. That said, the two scores are not equally well evidenced: BlueDriver OBD2 Scan Tool has 14K ratings behind it against 5, 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 26% of UMA Tune's.

BlueDriver OBD2 Scan Tool ships an update fortnightly, UMA Tune every 2 weeks. The most recent releases landed on November 8, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | BlueDriver OBD2 Scan Tool | UMA Tune |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (14K ratings)](https://appshunter.io/ios/app/bluedriver-obd2-scan-tool/id445403397/reviews)** | [3.6 (5 ratings)](https://appshunter.io/ios/app/uma-tune/id1405467126/reviews) |
| Number of ratings | **14K** | 5 |
| Positive reviews | **58.5% of reviews** | 25.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 273 MB | 122 MB |
| Requires iOS | 16.6 | **10.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Lemur Vehicle Monitors](https://appshunter.io/developer/445403400) | [UMA RACING SDN. BHD.](https://appshunter.io/developer/1403287201) |

## 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


### UMA Tune

[App page](https://appshunter.io/ios/app/uma-tune/id1405467126)

Monitor and adjust engine parameters for M5 ECUs. Features include real-time data monitoring, power metering, log analysis, and malf-code reading. Offers advanced tuning capabilities and map sharing.

**Highlights:** Real-time engine data monitoring, Power meter (HP/torque/acceleration), Log data analysis, Malf-code reading, Engine parameter adjustment, Tuning map sharing

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Auto Tune | $2.99 | one-time |
| Basic Functionality | $9.99 | one-time |


## Frequently asked questions

### Is BlueDriver OBD2 Scan Tool free?

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

### Is UMA Tune free?

UMA Tune is free to download, with in-app purchases available.

### Which has better reviews, BlueDriver OBD2 Scan Tool or UMA Tune?

BlueDriver OBD2 Scan Tool is rated higher. BlueDriver OBD2 Scan Tool averages 4.6 out of 5 from 14K ratings, while UMA Tune averages 3.6 from 5 ratings.

### Do BlueDriver OBD2 Scan Tool or UMA Tune have ads?

Neither BlueDriver OBD2 Scan Tool nor UMA Tune shows ads.

### Which is updated more often, BlueDriver OBD2 Scan Tool or UMA Tune?

BlueDriver OBD2 Scan Tool ships an update fortnightly, and UMA Tune every 2 weeks. Most recently, BlueDriver OBD2 Scan Tool was updated on November 8, 2026 and UMA Tune on November 2, 2026.

---

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