# OBD2 Car Scanner vs ThinkDiag+

The clearest difference is in-app purchases: ThinkDiag+ at none against OBD2 Car Scanner's 3. ThinkDiag+ also leads on review sentiment (74% vs 55%) and iOS requirement (12.0 vs 14.0). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. OBD2 Car Scanner sells 3 one-off in-app purchases. ThinkDiag+ asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for OBD2 Car Scanner against 4.5 for ThinkDiag+. Both are backed by a comparable volume of ratings — 5K and 4.3K respectively. Written reviews are what separate them: 55% of OBD2 Car Scanner's written reviews are positive against 74% of ThinkDiag+'s.

OBD2 Car Scanner ships an update every 5 weeks, ThinkDiag+ every 3 weeks. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | OBD2 Car Scanner | ThinkDiag+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (5K ratings)](https://appshunter.io/ios/app/obd2-car-scanner-eobd-facile/id713921569/reviews)** | [4.5 (4.3K ratings)](https://appshunter.io/ios/app/thinkdiag-plus/id1483420979/reviews) |
| Number of ratings | **5K** | 4.3K |
| Positive reviews | 54.6% of reviews | **73.6% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 65 MB | 539 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [OUTILS OBD FACILE SARL](https://appshunter.io/developer/694586088) | [THINKCAR INC](https://appshunter.io/developer/1464847379) |

## What reviewers say

### OBD2 Car Scanner

[App page](https://appshunter.io/ios/app/obd2-car-scanner-eobd-facile/id713921569)

Transform your smartphone into a professional car diagnostic tool. Read and clear engine fault codes, monitor real-time sensor data, and perform advanced diagnostics without a mechanic. Supports a wide range of OBD2 compliant vehicles.

**Highlights:** Read and clear engine fault codes, Monitor real-time sensor data, Turn off check engine light, VIN decoder, Acceleration performance test, Generate PDF diagnostic reports

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic Edition | $19.99 | one-time |
| Upgrade to Plus Edition | $20.99 | one-time |
| Plus edition | $39.99 | one-time |

**What reviewers like**

- 👍 Helpful for diagnosing issues
- 🚀 Easy to use and connect
- 💡 Provides useful vehicle data
- 🔍 Able to read and clear error codes

**What reviewers complain about**

- 💰 Expensive for full functionality
- 🔒 Requires paid upgrade to access key features
- 🐛 Connectivity issues and app crashes
- 🚫 Limited functionality in free version

**Reported bugs**

- Unable to connect to some OBD2 adapters
- Incorrect or missing sensor data
- Paid version not functioning as expected

**Requested features**

- Add support for more vehicle makes and models
- Improve user interface and data visualization
- Ability to reset service lights and perform more advanced diagnostics
- Integrate with vehicle GPS for location-based data


### ThinkDiag+

[App page](https://appshunter.io/ios/app/thinkdiag-plus/id1483420979)

This app provides professional-level vehicle diagnostics, offering features like reading/clearing fault codes, data flow analysis, and special maintenance functions. It supports a wide range of car brands and allows users to subscribe to specific diagnostic software. Connects via Bluetooth to your smartphone for intelligent vehicle analysis.

**Highlights:** OE-level diagnostic functions, Full OBD II diagnosis, Special maintenance functions, Supports 100+ vehicle brands, Automatic VIN reading, Professional diagnostic reports, In-app user community

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 🚀 Powerful diagnostic capabilities
- 🚀 Affordable price
- 🚀 Helpful customer support
- 🚀 Versatile for DIY and professionals

**What reviewers complain about**

- 🐛 Occasional crashes or freezes
- 🐛 Compatibility issues with certain vehicles
- 🔒 Concerns about annual subscription fees
- 🔒 Limited functionality on iOS devices

**Reported bugs**

- Failure to recognize VIN or vehicle information
- Inability to clear certain error codes
- Inconsistent performance across different devices

**Requested features**

- Improved user interface and navigation
- More detailed troubleshooting guides
- Expanded vehicle coverage and special functions
- Offline mode for diagnostics


## Frequently asked questions

### Is OBD2 Car Scanner free?

OBD2 Car Scanner is free to download, with in-app purchases available.

### Is ThinkDiag+ free?

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

### Which has better reviews, OBD2 Car Scanner or ThinkDiag+?

OBD2 Car Scanner is rated higher. OBD2 Car Scanner averages 4.6 out of 5 from 5K ratings, while ThinkDiag+ averages 4.5 from 4.3K ratings.

### Do OBD2 Car Scanner or ThinkDiag+ have ads?

Neither OBD2 Car Scanner nor ThinkDiag+ shows ads.

### Which is updated more often, OBD2 Car Scanner or ThinkDiag+?

OBD2 Car Scanner ships an update every 5 weeks, and ThinkDiag+ every 3 weeks. Most recently, OBD2 Car Scanner was updated on September 24, 2026 and ThinkDiag+ on September 22, 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.*