# ThinkDiag+ vs Auto101 Pro

The clearest difference is rating: Auto101 Pro at 5.0 against ThinkDiag+'s 4.5. Auto101 Pro also leads on review sentiment (100% vs 74%) and monetization model (free vs free with in-app purchases). ThinkDiag+'s advantage is ratings volume (4.3K vs 5) and iOS requirement (12.0 vs 16.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Auto101 Pro holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: ThinkDiag+ has 4.3K ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 74% of ThinkDiag+'s written reviews are positive against 100% of Auto101 Pro's.

ThinkDiag+ ships an update every 3 weeks, Auto101 Pro every 2 weeks. The most recent releases landed on September 25, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | ThinkDiag+ | Auto101 Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (4.3K ratings)](https://appshunter.io/ios/app/thinkdiag-plus/id1483420979/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/auto101-pro/id6757863826/reviews)** |
| Number of ratings | **4.3K** | 5 |
| Positive reviews | 73.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 539 MB | 133 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [THINKCAR INC](https://appshunter.io/developer/1464847379) | [AUTO101 LLC](https://appshunter.io/developer/1869348805) |

## What reviewers say

### 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


### Auto101 Pro

[App page](https://appshunter.io/ios/app/auto101-pro/id6757863826)

This professional diagnostic tool provides in-depth analysis and control for GM, Ford, and Chrysler vehicles. It allows reading and clearing diagnostic trouble codes, performing relearn procedures, and managing vehicle security systems.

**Highlights:** Read/Clear DTCs, Perform relearn procedures, Manage vehicle security, Read VIN and calibration data, Support for GM, Ford, Chrysler

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

**In-app purchases:** none


## Frequently asked questions

### Is ThinkDiag+ free?

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

### Is Auto101 Pro free?

Auto101 Pro is free to download, with no in-app purchases.

### Which has better reviews, ThinkDiag+ or Auto101 Pro?

Auto101 Pro is rated higher. ThinkDiag+ averages 4.5 out of 5 from 4.3K ratings, while Auto101 Pro averages 5.0 from 5 ratings.

### Do ThinkDiag+ or Auto101 Pro have ads?

Neither ThinkDiag+ nor Auto101 Pro shows ads.

### Which is updated more often, ThinkDiag+ or Auto101 Pro?

ThinkDiag+ ships an update every 3 weeks, and Auto101 Pro every 2 weeks. Most recently, ThinkDiag+ was updated on September 25, 2026 and Auto101 Pro on September 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*