# EasyDiag4 vs ThinkCar Bay

The clearest difference is review sentiment: ThinkCar Bay at 50% against EasyDiag4's 0%. ThinkCar Bay also leads on rating (3.3 vs 2.9) and update cadence (every 5 months vs every 18 months). EasyDiag4's advantage is ratings volume (19 vs 3). On price, ads, in-app purchases and monetization model there is nothing between them.

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

ThinkCar Bay holds the better App Store score, 3.3 against 2.9. That said, the two scores are not equally well evidenced: EasyDiag4 has 19 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 0% of EasyDiag4's written reviews are positive against 50% of ThinkCar Bay's.

EasyDiag4 ships an update every 18 months, ThinkCar Bay every 5 months. The most recent releases landed on September 20, 2026 and July 19, 2026 respectively.

## The numbers

| Metric | EasyDiag4 | ThinkCar Bay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.9 (19 ratings)](https://appshunter.io/ios/app/easydiag4/id1505477232/reviews) | **[3.3 (3 ratings)](https://appshunter.io/ios/app/thinkcar-bay/id6444782891/reviews)** |
| Number of ratings | **19** | 3 |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 5 months** |
| Monetization | Free | Free |
| Size | 114 MB | 215 MB |
| Requires iOS | 11.0 | **9.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Launch Tech Co., Ltd](https://appshunter.io/developer/447568418) | [THINKCAR INC](https://appshunter.io/developer/1464847379) |

## What reviewers say

### 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


### ThinkCar Bay

[App page](https://appshunter.io/ios/app/thinkcar-bay/id6444782891)

This service application supports THINKCAR automotive diagnostic products. It offers tutorials, case studies, after-sales service, and online viewing of diagnostic reports. Manage your products and get assistance with their use.

**Highlights:** Product tutorials, Case studies, After-sales service, User product management, Online diagnostic report viewing

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EasyDiag4 free?

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

### Is ThinkCar Bay free?

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

### Which has better reviews, EasyDiag4 or ThinkCar Bay?

ThinkCar Bay is rated higher. EasyDiag4 averages 2.9 out of 5 from 19 ratings, while ThinkCar Bay averages 3.3 from 3 ratings.

### Do EasyDiag4 or ThinkCar Bay have ads?

Neither EasyDiag4 nor ThinkCar Bay shows ads.

### Which is updated more often, EasyDiag4 or ThinkCar Bay?

EasyDiag4 ships an update every 18 months, and ThinkCar Bay every 5 months. Most recently, EasyDiag4 was updated on September 20, 2026 and ThinkCar Bay on July 19, 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.*