# BlueDriver OBD2 Scan Tool vs SLO/SLA Calc

The clearest difference is price: BlueDriver OBD2 Scan Tool at Free against SLO/SLA Calc's $1.99. BlueDriver OBD2 Scan Tool also leads on ratings volume (14K vs 1). SLO/SLA Calc's advantage is review sentiment (100% vs 58%) and rating (5.0 vs 4.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

BlueDriver OBD2 Scan Tool is free to download; SLO/SLA Calc costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SLO/SLA Calc 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 SLO/SLA Calc's.

BlueDriver OBD2 Scan Tool ships an update fortnightly, SLO/SLA Calc every 11 days. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | BlueDriver OBD2 Scan Tool | SLO/SLA Calc |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| 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/slosla-calc/id6789262199/reviews)** |
| Number of ratings | **14K** | 1 |
| Positive reviews | 58.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 11 days** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 273 MB | 5 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Lemur Vehicle Monitors](https://appshunter.io/developer/445403400) | [Ruben Calzadilla](https://appshunter.io/developer/1130032354) |

## 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


### SLO/SLA Calc

[App page](https://appshunter.io/ios/app/slosla-calc/id6789262199)

This tool helps engineers and operators model system availability and evaluate designs before deployment. It calculates availability for various configurations, estimates device reliability, and allows users to build and visualize complex systems. Generate professional PDF reports and review key definitions for availability and reliability.

**Highlights:** Calculate system and device availability, Model series, parallel, and N:M designs, Estimate device availability using MTBF, MTTR, Save and reuse devices/subsystems as Blocks, Build larger Systems by connecting Blocks, Visualize system architecture, Generate and share PDF reports

**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 SLO/SLA Calc free?

SLO/SLA Calc costs $1.99, with no in-app purchases.

### Which has better reviews, BlueDriver OBD2 Scan Tool or SLO/SLA Calc?

SLO/SLA Calc is rated higher. BlueDriver OBD2 Scan Tool averages 4.6 out of 5 from 14K ratings, while SLO/SLA Calc averages 5.0 from 1 ratings.

### Do BlueDriver OBD2 Scan Tool or SLO/SLA Calc have ads?

Neither BlueDriver OBD2 Scan Tool nor SLO/SLA Calc shows ads.

### Which is updated more often, BlueDriver OBD2 Scan Tool or SLO/SLA Calc?

BlueDriver OBD2 Scan Tool ships an update fortnightly, and SLO/SLA Calc every 11 days. Most recently, BlueDriver OBD2 Scan Tool was updated on November 8, 2026 and SLO/SLA Calc on October 31, 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.*