# BlueDriver OBD2 Scan Tool vs Interlock Warm Up

The clearest difference is review sentiment: BlueDriver OBD2 Scan Tool at 57% against Interlock Warm Up's 0%. BlueDriver OBD2 Scan Tool also leads on rating (4.6 vs 1.5) and update cadence (every 9 days vs every 10 months). Interlock Warm Up's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (12.0 vs 16.6). 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.

BlueDriver OBD2 Scan Tool holds the better App Store score, 4.6 against 1.5. That said, the two scores are not equally well evidenced: BlueDriver OBD2 Scan Tool has 14K ratings behind it against 8, 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 0% of Interlock Warm Up's.

BlueDriver OBD2 Scan Tool ships an update every 9 days, Interlock Warm Up every 10 months. The most recent releases landed on September 30, 2026 and June 3, 2026 respectively.

## The numbers

| Metric | BlueDriver OBD2 Scan Tool | Interlock Warm Up |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (14K ratings)](https://appshunter.io/ios/app/bluedriver-obd2-scan-tool/id445403397/reviews)** | [1.5 (8 ratings)](https://appshunter.io/ios/app/interlock-warm-up/id1457709536/reviews) |
| Number of ratings | **14K** | 8 |
| Positive reviews | **57.1% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 10 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 278 MB | 26 MB |
| Requires iOS | 16.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Lemur Vehicle Monitors](https://appshunter.io/developer/445403400) | [Low Cost Interlock](https://appshunter.io/developer/1262604721) |

## 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


### Interlock Warm Up

[App page](https://appshunter.io/ios/app/interlock-warm-up/id1457709536)

This app allows you to remotely start the interlock warm-up process for your vehicle. Avoid waiting in your car by initiating the warm-up sequence from your mobile device.

**Highlights:** Remote start warm-up process, Eliminate wait time in vehicle, Control interlock system, Mobile device integration

**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 Interlock Warm Up free?

Interlock Warm Up is free to download, with no in-app purchases.

### Which has better reviews, BlueDriver OBD2 Scan Tool or Interlock Warm Up?

BlueDriver OBD2 Scan Tool is rated higher. BlueDriver OBD2 Scan Tool averages 4.6 out of 5 from 14K ratings, while Interlock Warm Up averages 1.5 from 8 ratings.

### Do BlueDriver OBD2 Scan Tool or Interlock Warm Up have ads?

Neither BlueDriver OBD2 Scan Tool nor Interlock Warm Up shows ads.

### Which is updated more often, BlueDriver OBD2 Scan Tool or Interlock Warm Up?

BlueDriver OBD2 Scan Tool ships an update every 9 days, and Interlock Warm Up every 10 months. Most recently, BlueDriver OBD2 Scan Tool was updated on September 30, 2026 and Interlock Warm Up on June 3, 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.*