KDIAG vs GOOLOO OBD
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！
GOOLOO OBD
This app transforms your phone into a powerful car diagnostic tool via Bluetooth. It offers comprehensive system checks, full OBD2 functions, and specialized maintenance services for a wide range of vehicle brands.
- Full System Diagnosis
- Full OBD2 Functions
- 6 Special Maintenance Functions
- Repair Data Library
- AutoVIN Vehicle Identification
- Bluetooth 5.0 Wireless Connection
- Diagnostic Report Generation
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Easily link the app with your Phone using Bluetooth, transforming your devices into a smart and high-powered diagnostic tool! Packed with essential features like complete OBDII functionality, all system diagnosis, AutoVIN, automatic diagnostic reports, and more, this Bluetooth OBDII scan tool is a must-have for your car. Its versatility shines through with 6 maintenance service functions and coverage for over 80 vehicle brands, making the product a portable and adaptable auto scanner. Main Features: 1. Full System Diagnosis: Covers Engine, Transmission, Airbag, ABS, ESP, TPMS, Immobilizer, Steering, Radio, Air Conditioning, and more. 2. Full OBD2 Functions: works as an OBD2 code reader and performs all 10 modes of OBD2 testing free for life. 3. 6 Special Functions: Perform Oil Reset, Throttle Adaptation, EPB Reset, BMS Reset, and more. 4. Repair Data Library: Includes DTC Repair Guide, Technical Service Bulletin, DLC Location, Warning Light Library. 5. AutoVIN: Enables automatic vehicle identification for quick diagnosis. 6. Wireless Connection: Utilizes Bluetooth 5.0 with a range of 33 feet/10m. 7. Graphs, Values, and Dashboard-like Data Display: Ensures easy interpretation of information. 8. Generate Diagnostic Reports: Obtain detailed reports for Systems, Fault Codes, or Data Streams EULA：https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: KDIAG at 3.4 against GOOLOO OBD's 1.0. KDIAG also leads on in-app purchases (none vs 10) and update cadence (every 3 weeks vs every 3 months). GOOLOO OBD's advantage is iOS requirement (11.0 vs 17.0). On price, 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. GOOLOO OBD sells 10 in-app purchases, starting at $4.99 per month. KDIAG asks for nothing beyond the download.
KDIAG holds the better App Store score, 3.4 against 1.0. That said, the two scores are not equally well evidenced: KDIAG has 17 ratings behind it against 1, so its average is the more settled of the two.
KDIAG ships an update every 3 weeks, GOOLOO OBD every 3 months. The most recent releases landed on September 21, 2026 and September 4, 2026 respectively.
| Parameter | KDIAG | GOOLOO OBD |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (17 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 17 — better | 1 |
| Update frequency | Every 3 weeks — better | Every 3 months |
| 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 | 11.0 — better |
| Further details — not scored | ||
| Size | 74 MB | 1.6 GB |
| Age rating | 4+ | 4+ |
| Developer | 祖策 谢 | Changsha Angsi E-commerce Co., Ltd. |
Customer experience
KDIAG
GOOLOO OBD
In-app purchases
KDIAG
No in-app purchases
GOOLOO OBD
- Monthly Auto-renewal$4.991 Month
- Annual Auto-renewal$29.991 Year
- Renault Gateway 5 Tokens$147.99
- Nissan Gateway 5 Tokens (EU only)$147.99
- FCA Gateway 1-year Access (EU only)$229.99
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- VW SFD Gateway 1-year Access$229.99
- Renault Gateway 10 Tokens$254.99
- Nissan Gateway 10 Tokens (EU only)$254.99
- Renault Gateway 20 Tokens$464.99
- Nissan Gateway 20 Tokens (EU only)$464.99
