# OBD JScan vs ThinkDiag+

The clearest difference is in-app purchases: ThinkDiag+ at none against OBD JScan's 8. ThinkDiag+ also leads on ratings volume (4.3K vs 1.3K). OBD JScan's advantage is rating (4.7 vs 4.5). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. OBD JScan sells 7 one-off in-app purchases. ThinkDiag+ asks for nothing beyond the download.

OBD JScan holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 1.3K and 4.3K respectively. Written reviews point the same way: 80% of OBD JScan's written reviews are positive against 74% of ThinkDiag+'s.

Both ship on a similar rhythm, roughly every 3 weeks. Both last shipped on October 16, 2026.

## The numbers

| Metric | OBD JScan | ThinkDiag+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.3K ratings)](https://appshunter.io/ios/app/obd-jscan/id1445903514/reviews)** | [4.5 (4.3K ratings)](https://appshunter.io/ios/app/thinkdiag-plus/id1483420979/reviews) |
| Number of ratings | 1.3K | **4.3K** |
| Positive reviews | **79.6% of reviews** | 74.1% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 403 MB | 539 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Piotr Bialic](https://appshunter.io/developer/960266498) | [THINKCAR INC](https://appshunter.io/developer/1464847379) |

## What reviewers say

### OBD JScan

[App page](https://appshunter.io/ios/app/obd-jscan/id1445903514)

This app provides advanced diagnostics for Jeep, Chrysler, and Dodge vehicles. It allows users to read and clear trouble codes, view live sensor data, and access settings across all vehicle modules, including ABS and transmission.

**Highlights:** Read/Clear Diagnostic Trouble Codes, Access Live Data from all sensors, View vehicle settings, Access all vehicle modules (ABS, Transmission, etc.), Identify module, VIN, Part Number, and Version, Share vehicle trouble codes

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| + 1 garage license | $9.99 | one-time |
| 1 VIN license | $20.99 | one-time |
| Add 1 VIN | $20.99 | one-time |
| Add 1 VIN Vehicle Slot | $20.99 | one-time |
| 3 VIN licenses | $54.99 | one-time |
| 5 VIN Licenses | $84.99 | one-time |
| 10 VIN Licenses | $149.99 | one-time |

**What reviewers like**

- 🚀 Easy to use
- 🔧 Powerful customization options
- 👍 Excellent customer support
- 💡 Useful diagnostic and monitoring features
- 🔓 Enables features otherwise locked by dealer

**What reviewers complain about**

- 🐛 Occasional connectivity issues
- 🔌 Requires additional hardware purchase
- ⚠️ Compatibility issues with newer vehicle models
- 🕰️ Slow performance in certain scenarios

**Reported bugs**

- Inability to save/export diagnostic data
- Inconsistent behavior when changing vehicle settings

**Requested features**

- Expanded vehicle compatibility
- Improved stability and reliability
- Enhanced user interface and guidance
- Integration with other vehicle apps/services


### 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 OBD JScan free?

OBD JScan 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, OBD JScan or ThinkDiag+?

OBD JScan is rated higher. OBD JScan averages 4.7 out of 5 from 1.3K ratings, while ThinkDiag+ averages 4.5 from 4.3K ratings.

### Do OBD JScan or ThinkDiag+ have ads?

Neither OBD JScan nor ThinkDiag+ shows ads.

### Which is updated more often, OBD JScan or ThinkDiag+?

OBD JScan ships an update every 3 weeks, and ThinkDiag+ every 3 weeks. Most recently, OBD JScan was updated on October 16, 2026 and ThinkDiag+ on October 16, 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.*