ThinkCar Bay vs KDIAG
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ThinkCar Bay
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.
- Product tutorials
- Case studies
- After-sales service
- User product management
- Online diagnostic report viewing
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Thinkcar bay is a service application for THINKCAR brand products, providing users who have purchased various types of automotive diagnostic products with tutorials, case studies, after-sales service, user product management and online viewing of diagnostic reports for various products, providing assistance to users in the process of using the products.
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！
Screenshots
Verdict
The clearest difference is update cadence: KDIAG at every 3 weeks against ThinkCar Bay's every 5 months. KDIAG also leads on ratings volume (17 vs 3). ThinkCar Bay's advantage is review sentiment (50% vs 33%) and iOS requirement (9.0 vs 17.0). On price, rating, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 3.3 for ThinkCar Bay against 3.4 for KDIAG. 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 are what separate them: 50% of ThinkCar Bay's written reviews are positive against 33% of KDIAG's.
ThinkCar Bay ships an update every 5 months, KDIAG every 3 weeks. The most recent releases landed on July 19, 2026 and September 21, 2026 respectively.
| Parameter | ThinkCar Bay | KDIAG |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (3 ratings) | 3.4 (17 ratings) — better |
| Positive reviews | 50.0% of reviews — better | 33.3% of reviews |
| Number of ratings | 3 | 17 — better |
| Update frequency | Every 5 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 215 MB | 74 MB |
| Age rating | 17+ | 4+ |
| Developer | THINKCAR INC | 祖策 谢 |
Customer experience
ThinkCar Bay
KDIAG
In-app purchases
ThinkCar Bay
No in-app purchases
KDIAG
No in-app purchases
