# KDIAG — KDIAG

> Automotive diagnostic app for fault detection and OBD functions. (iPhone/iPad app by 祖策 谢.)

- Source: https://appshunter.io/ios/app/kdiag/id6450169808 (this page in markdown: same URL + `.md`)
- Developer: [祖策 谢](https://appshunter.io/developer/983519195)
- Category: Utilities, Productivity
- Price: Free
- Rating: 3.40/5 from 17 App Store ratings · 12 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 56 MB
- Languages: American English, French (France), German (Germany), Italian, Polish, Russian, Chinese (Simplified, China), European Spanish
- Released: 2023-06-21
- Data updated: 2026-08-14
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/kdiag/id6450169808/reviews.md

## What is KDIAG?

The "KDIAG" automotive diagnostic app will provide you with the most comprehensive automotive fault detection and OBD functions, supporting system fault diagnosis for various mainstream brand cars and providing free use. Whether you are a car enthusiast or a professional technician, you can easily use it. The app also supports 8 languages to meet the needs of users worldwide. The app provides professional automotive diagnostic services that can quickly identify and solve automotive faults. Whether you are at home or on the road, you can easily use our application to ensure that your car remains in optimal condition. Download and experience our car diagnostic app to make your driving safer and smoother!

"KDIAG"汽车诊断APP将为您提供最全面的汽车故障检测和OBD功能，支持多种主流品牌汽车的系统故障诊断并免费提供使用，无论您是一位汽车爱好者或专业技师，都能轻松使用。App还支持8种语言，满足全球使用者的使用需求。App提供专业级的汽车诊断服务，能够快速识别和解决汽车故障。无论您是在家里还是在路上，都可以轻松使用我们的应用程式来确保您的汽车保持最佳状态。快来下载并体验我们的汽车诊断APP，让您的驾驶更加安全和顺畅！

## Key features

- Comprehensive automotive fault detection
- OBD functions
- System fault diagnosis for mainstream brands
- Free to use
- Supports 8 languages
- Professional diagnostic services

## Recent user reviews (10 of 12)

All indexed reviews: https://appshunter.io/ios/app/kdiag/id6450169808/reviews.md

### 5/5 — Yes

*2026-05-23*

Thank u so much this is a amazing tool

### 2/5 — Serious potential

*2026-05-13*

Not even a simple misfire counter on this “bidirectional” tool app. I see the potential though.

### 5/5 — This is FREEDOM

*2026-03-22*

I absolutely love this OBDII reader. I love working on my car but up until now I’ve had to pay a mechanic just to get the code to a problem I’d be facing with my car. If I went onto online forums I’d always be asked, “What’s the error code?”

### 2/5 — Не всё работает

*2024-09-09*

Не все функции из перечисленного работают ! Пробовал на разных марках авто! С этим могут справиться и сканеры  за более низкие цены !!!

### 2/5 — Ahmad

*2024-08-23*

Unfortunately, the description of the piece says that it supports the Arabic language, but it does not support

### 5/5 — 👍🏻

*2024-05-21*

Muy buen scanner lo recomiendo

### 1/5 — Bluetooth Verbindung nicht mehr möglich seit Update

*2024-03-20*

Alles hat immer einwandfrei funktioniert. Jetzt geht gar nichts mehr. Danke an die Entwicklung

### 1/5 — Armaturenbrett Anzeige App stürzt ab

*2024-01-07*

Fehleranzeige scheint ok zu sein, bei der Armaturenbrett Anzeige geht die App einfach zu

### 3/5 — App is ok to view DTCs

*2023-12-01*

Viewing and resetting error codes works but e.g. the regeneration of the particle filter for Mercedes Benz does not work and runs into internal errors

### 5/5 — Súper genial

*2023-11-27*

Súper su escanner y app muy fáciles, sería súper genial que lo pusieran para CarPlay y así poder verlo en la pantalla de los vehículos

## Frequently asked questions about KDIAG

### What car brands does KDIAG support for system fault diagnosis?

KDIAG supports system fault diagnosis for various mainstream brand cars. The specific list of supported brands is not detailed in the provided information, but it aims to cover a wide range of popular manufacturers.

### Is KDIAG free to use?

Yes, KDIAG is provided for free use, offering comprehensive automotive fault detection and OBD functions without any cost to the user.

### What languages does KDIAG support?

KDIAG supports 8 languages, making it accessible to a global user base and catering to diverse linguistic needs for automotive diagnostics.

### What is the age rating for KDIAG?

KDIAG has an age rating of 17+, indicating it is intended for mature users due to the nature of automotive diagnostics and technical information.

### How often is KDIAG updated?

The latest version of KDIAG is 1.7.3, and it was last updated on February 2nd, 2026. This suggests a recent update, though the frequency of future updates is not specified.

### What devices are supported by KDIAG?

KDIAG is supported on iPhone, iPad, and iPod devices, making it compatible with a range of Apple mobile and tablet hardware.

### Does KDIAG have ads?

No, KDIAG does not contain advertisements. The app is free to use and does not display any ads to its users.

### What is the user rating for KDIAG?

KDIAG has a user rating of 3.6 stars based on 11 ratings. This indicates a generally positive but mixed reception from its current user base.

## Version history (last 5 releases)

### 1.7.12 — 2026-08-06

- Fix the issue of the return button on the OBD page being ineffective
- OBD Russian translation optimization

### 1.7.11 — 2026-07-29

- BUG FIX

### 1.7.10 — 2026-07-18

- The GM repair and maintenance reset functions may experience crashes during the diagnostic process

### 1.7.9 — 2026-07-09

- Fix the crash issue.

### 1.7.8 — 2026-06-25

- Fix firmware update instability issues

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## More apps by 祖策 谢

- [Kbattery](https://appshunter.io/ios/app/kbattery/id1587655995)
- [Upgrade Tool General bluetooth](https://appshunter.io/ios/app/upgrade-tool-general-bluetooth/id1631285020)
- [蓝牙收发工具](https://appshunter.io/ios/app/id1658298287)
- [BKmonitor](https://appshunter.io/ios/app/bkmonitor/id6502943237)
- [MAXOBD](https://appshunter.io/ios/app/maxobd/id6737468032)

All apps by 祖策 谢: https://appshunter.io/developer/983519195

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-14.*