KDIAG vs Launch AIOBD
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KDIAG
This app offers comprehensive automotive fault detection and OBD functions for various car brands. It provides professional diagnostic services to quickly identify and resolve car issues, making driving safer and smoother for enthusiasts and professionals alike. The app supports 8 languages and is free to use.
- Comprehensive automotive fault detection
- OBD functions
- System fault diagnosis for mainstream brands
- Free to use
- Supports 8 languages
- Professional diagnostic services
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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!
Launch AIOBD
This tool diagnoses vehicle faults using a mobile device and a Bluetooth connector. It performs full system diagnostics, reads and clears trouble codes, and analyzes data streams for various car models.
- Full system vehicle diagnosis
- One-click intelligent diagnosis
- Read and clear DTCs
- Read data streams
- Salt spray testing
- Supports mainstream models
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LAUNCH AIOBD vehicle diagnostic application is a vehicle fault diagnosis tool software developed based on the mobile intelligent terminal platform and suitable for the vehicle repair market. By using a dedicated connector to interact with the vehicle through Bluetooth data, it supports one-click intelligent diagnosis and can realize the fault diagnosis of the full systems of the vehicle including the power system, safety system, etc. It supports functions such as automatic OBD, reading DTCs, clearing DTCs, reading data streams, and salt spray testing. The software contains EOBD, salt spray testing, and diagnostic software for various mainstream models. It can meet the actual needs of most users to detect vehicles.
Screenshots
Verdict
The clearest difference is rating: KDIAG at 3.4 against Launch AIOBD's 2.3. KDIAG also leads on in-app purchases (none vs 19) and review sentiment (33% vs 0%). Launch AIOBD's advantage is iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Launch AIOBD sells 19 one-off in-app purchases. KDIAG asks for nothing beyond the download.
KDIAG holds the better App Store score, 3.4 against 2.3. That said, the two scores are not equally well evidenced: KDIAG has 17 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 33% of KDIAG's written reviews are positive against 0% of Launch AIOBD's.
KDIAG ships an update every 3 weeks, Launch AIOBD fortnightly. The most recent releases landed on September 21, 2026 and September 20, 2026 respectively.
| Parameter | KDIAG | Launch AIOBD |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (17 ratings) — better | 2.3 (3 ratings) |
| Positive reviews | 33.3% of reviews — better | 0.0% of reviews |
| Number of ratings | 17 — better | 3 |
| Update frequency | Every 3 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 17.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 74 MB | 751 MB |
| Age rating | 4+ | 17+ |
| Developer | 祖策 谢 | Launch Tech Co., Ltd |
Customer experience
KDIAG
Launch AIOBD
In-app purchases
KDIAG
No in-app purchases
Launch AIOBD
- FIAT$0.29
- Software services(2.99)$2.99
- Software services(3.99)$3.99
Show 16 moreShow fewer
- Software services(4.99)$4.99
- Software services(8.99)$8.99
- Software services(9.99)$9.99
- Software services(29.99)$29.99
- Software services(31.99)$31.99
- MAZDA$35.99
- BENZ$35.99
- GM$35.99
- HONDA$35.99
- HYUNDAI$35.99
- NISSAN$35.99
- TOYOTA$35.99
- USAFORD$35.99
- VM$35.99
- VOLVO$35.99
- CHRYSLER$35.99








