# ThinkDiag+ vs TopScan Pad

The clearest difference is monetization model: TopScan Pad at free against ThinkDiag+'s free with in-app purchases. ThinkDiag+'s advantage is ratings volume (4.3K vs 5) and update cadence (every 3 weeks vs every 4 months). On price, rating, 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.

On the App Store both sit at effectively the same score — 4.5 for ThinkDiag+ against 4.4 for TopScan Pad. 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.

ThinkDiag+ ships an update every 3 weeks, TopScan Pad every 4 months. The most recent releases landed on October 19, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | ThinkDiag+ | TopScan Pad |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (4.3K ratings)](https://appshunter.io/ios/app/thinkdiag-plus/id1483420979/reviews)** | [4.4 (5 ratings)](https://appshunter.io/ios/app/topscan-pad/id6476964730/reviews) |
| Number of ratings | **4.3K** | 5 |
| Positive reviews | 74.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 539 MB | 2.2 GB |
| Requires iOS | 12.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 17+ | 4+ |
| Developer | [THINKCAR INC](https://appshunter.io/developer/1464847379) | [HK TOPDON TECHNOLOGY Co., LIMITED](https://appshunter.io/developer/1846276192) |

## 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


### TopScan Pad

[App page](https://appshunter.io/ios/app/topscan-pad/id6476964730)

Transform your tablet into a powerful vehicle diagnostic tool with this app. It offers comprehensive system scans, bi-directional controls, and special maintenance functions for over 100 car brands. Easily identify and resolve vehicle issues with detailed reports and a repair data library.

**Highlights:** Full-system diagnosis, Bi-directional controls, AutoVIN vehicle identification, Special maintenance functions, Wireless Bluetooth 5.0 connection, Diagnostic report generation, Repair data library

**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 TopScan Pad free?

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

### Which has better reviews, ThinkDiag+ or TopScan Pad?

ThinkDiag+ is rated higher. ThinkDiag+ averages 4.5 out of 5 from 4.3K ratings, while TopScan Pad averages 4.4 from 5 ratings.

### Do ThinkDiag+ or TopScan Pad have ads?

Neither ThinkDiag+ nor TopScan Pad shows ads.

### Which is updated more often, ThinkDiag+ or TopScan Pad?

ThinkDiag+ ships an update every 3 weeks, and TopScan Pad every 4 months. Most recently, ThinkDiag+ was updated on October 19, 2026 and TopScan Pad 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.*