# iOBD2 vs OBD2 Scanner | OBD Auto Doctor

The clearest difference is rating: OBD2 Scanner | OBD Auto Doctor at 4.4 against iOBD2's 2.9. OBD2 Scanner | OBD Auto Doctor also leads on ratings volume (6.2K vs 85). iOBD2's advantage is in-app purchases (none vs 9) and iOS requirement (6.0 vs 17.0). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. OBD2 Scanner | OBD Auto Doctor sells 9 in-app purchases, starting at $4.99 per month. iOBD2 asks for nothing beyond the download.

OBD2 Scanner | OBD Auto Doctor holds the better App Store score, 4.4 against 2.9. That said, the two scores are not equally well evidenced: OBD2 Scanner | OBD Auto Doctor has 6.2K ratings behind it against 85, so its average is the more settled of the two. Written reviews point the same way: 23% of iOBD2's written reviews are positive against 30% of OBD2 Scanner | OBD Auto Doctor's.

iOBD2 ships an update every 5 weeks, OBD2 Scanner | OBD Auto Doctor every 3 weeks. Both last shipped on November 1, 2026.

## The numbers

| Metric | iOBD2 | OBD2 Scanner | OBD Auto Doctor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.9 (85 ratings)](https://appshunter.io/ios/app/iobd2/id528881858/reviews) | **[4.4 (6.2K ratings)](https://appshunter.io/ios/app/obd2-scanner-obd-auto-doctor/id908897183/reviews)** |
| Number of ratings | 85 | **6.2K** |
| Positive reviews | 23.4% of reviews | **30.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 90 MB | 19 MB |
| Requires iOS | **6.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [翔宇 金](https://appshunter.io/developer/528881861) | [Creosys](https://appshunter.io/developer/908897186) |

## What reviewers say

### iOBD2

[App page](https://appshunter.io/ios/app/iobd2/id528881858)

Transform your iPhone or iPad into a powerful vehicle diagnostic tool. Read engine data, check for issues, and monitor real-time performance metrics like fuel consumption and acceleration. Customize your dashboard to display only the information you care about.

**Highlights:** Read and clear diagnostic trouble codes (DTCs), Access live engine data, View freeze frame data, Monitor readiness test status, Read vehicle information (VIN, CALID, CVN), Perform O2 sensor and EVAP system tests, Customize real-time dashboards

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Works great
- 👍 Wonderful app
- 🚀 Excellent tool
- 👍 Good product
- 🚀 Awesome free app

**What reviewers complain about**

- 🐛 Doesn't work
- 🐛 Crashes frequently
- 🐛 Connection issues
- 🐛 Unreliable
- 🐛 Useless

**Reported bugs**

- Crashes when checking DTCs
- Fails to connect to Bluetooth/WiFi adapters
- Incorrect sensor readings
- Compatibility issues with newer vehicles

**Requested features**

- Update for newer iOS versions
- More frequent updates
- Support for more vehicle makes/models
- Customizable dashboards
- Live data for more sensors


### OBD2 Scanner | OBD Auto Doctor

[App page](https://appshunter.io/ios/app/obd2-scanner-obd-auto-doctor/id908897183)

Diagnose your car's engine light issues and monitor real-time performance data. This app allows you to read and clear diagnostic trouble codes, track fuel consumption, and view sensor data. It's a comprehensive tool for understanding your vehicle's health.

**Highlights:** Read and clear OBD2 diagnostic trouble codes (DTC), Reset Check Engine Light, Monitor real-time vehicle data and sensor readings, Track fuel consumption, Read readiness monitor status for emissions testing, Initiate service routines, Send diagnostic data via email

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly (legacy) | $4.99 | per month |
| Personal, monthly | $4.99 | per month |
| Premium, monthly | $5.99 | per month |
| Professional, monthly | $6.99 | per month |
| Yearly (legacy) | $23.99 | per year |
| Personal, yearly | $23.99 | per year |
| Professional, yearly | $29.99 | per year |
| Premium, annual | $29.99 | per year |
| OBD Auto Doctor Pro (legacy) | $29.99 | one-time |

**What reviewers like**

- 🚀 Works great
- 👍 Easy to use
- 🚀 Accurate diagnostics
- 🚀 Extensive adapter support
- 👍 Helpful for DIY mechanics

**What reviewers complain about**

- 🔒 Requires subscription for full functionality
- 🐛 Connection issues
- 🐛 Inconsistent performance
- 🐛 Doesn't work with all vehicles
- 💰 Expensive subscription

**Reported bugs**

- App crashes on launch
- Fails to detect existing fault codes
- Subscription issues and inability to cancel
- Incompatible with certain OBD2 adapters

**Requested features**

- Add support for more vehicle makes and models
- Improve Bluetooth/WiFi connectivity
- Provide more detailed diagnostic information
- Allow clearing of error codes without subscription
- Add live data dashboards and graphs


## Frequently asked questions

### Is iOBD2 free?

iOBD2 is free to download, with no in-app purchases.

### Is OBD2 Scanner | OBD Auto Doctor free?

OBD2 Scanner | OBD Auto Doctor is free to download, with in-app purchases available.

### Which has better reviews, iOBD2 or OBD2 Scanner | OBD Auto Doctor?

OBD2 Scanner | OBD Auto Doctor is rated higher. iOBD2 averages 2.9 out of 5 from 85 ratings, while OBD2 Scanner | OBD Auto Doctor averages 4.4 from 6.2K ratings.

### Do iOBD2 or OBD2 Scanner | OBD Auto Doctor have ads?

Neither iOBD2 nor OBD2 Scanner | OBD Auto Doctor shows ads.

### Which is updated more often, iOBD2 or OBD2 Scanner | OBD Auto Doctor?

iOBD2 ships an update every 5 weeks, and OBD2 Scanner | OBD Auto Doctor every 3 weeks. Most recently, iOBD2 was updated on November 1, 2026 and OBD2 Scanner | OBD Auto Doctor on November 1, 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.*