# ThinkDiag+ vs EasyDiag4

The clearest difference is review sentiment: ThinkDiag+ at 74% against EasyDiag4's 0%. ThinkDiag+ also leads on rating (4.5 vs 2.9) and update cadence (every 3 weeks vs every 18 months). EasyDiag4's advantage is monetization model (free vs free with in-app purchases). On price, ads, in-app purchases and device support there is nothing between them.

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

ThinkDiag+ holds the better App Store score, 4.5 against 2.9. That said, the two scores are not equally well evidenced: ThinkDiag+ has 4.3K ratings behind it against 19, 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 0% of EasyDiag4's.

ThinkDiag+ ships an update every 3 weeks, EasyDiag4 every 18 months. The most recent releases landed on October 14, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | ThinkDiag+ | EasyDiag4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (4.3K ratings)](https://appshunter.io/ios/app/thinkdiag-plus/id1483420979/reviews)** | [2.9 (19 ratings)](https://appshunter.io/ios/app/easydiag4/id1505477232/reviews) |
| Number of ratings | **4.3K** | 19 |
| Positive reviews | **73.9% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 18 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 539 MB | 114 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [THINKCAR INC](https://appshunter.io/developer/1464847379) | [Launch Tech Co., Ltd](https://appshunter.io/developer/447568418) |

## 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


### EasyDiag4

[App page](https://appshunter.io/ios/app/easydiag4/id1505477232)

This application connects to your vehicle via Bluetooth to perform comprehensive fault diagnosis across various systems. It supports reading and clearing diagnostic trouble codes, viewing data streams, and resetting service lamps, catering to the needs of the vehicle maintenance market.

**Highlights:** Bluetooth vehicle data interaction, One-click intelligent diagnosis, Full system fault diagnosis, Read DTCs, Read Data Streams, Clear DTCs, Reset Service Lamp

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ThinkDiag+ free?

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

### Is EasyDiag4 free?

EasyDiag4 is free to download, with no in-app purchases.

### Which has better reviews, ThinkDiag+ or EasyDiag4?

ThinkDiag+ is rated higher. ThinkDiag+ averages 4.5 out of 5 from 4.3K ratings, while EasyDiag4 averages 2.9 from 19 ratings.

### Do ThinkDiag+ or EasyDiag4 have ads?

Neither ThinkDiag+ nor EasyDiag4 shows ads.

### Which is updated more often, ThinkDiag+ or EasyDiag4?

ThinkDiag+ ships an update every 3 weeks, and EasyDiag4 every 18 months. Most recently, ThinkDiag+ was updated on October 14, 2026 and EasyDiag4 on October 7, 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.*