ThinkDriver vs KDIAG
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ThinkDriver
This diagnostic tool allows car owners to perform full system vehicle checks, going beyond standard OBDII functionality. It provides immediate insights into potential car issues, acting as a comprehensive helper for vehicle maintenance.
- Full system vehicle diagnostics
- Advanced OBDII alternative
- Immediate issue detection
- DIY car maintenance helper
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THINKDRIVER, a DIY diagnostic product, which is extremely close to professional diagnostic tools, goodbye to normal OBDII dongle. THINKDRIVER can let all car owners to test the full system of the vehicle, much more than the OBDII. Now, THINKDRIVER will be the best helper for every car owner! This is the ultimate car diagnostic connector that allows you to easily and immediately know whether you should be aware of any issues with your car.
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 rating: ThinkDriver at 4.5 against KDIAG's 3.4. ThinkDriver also leads on review sentiment (58% vs 33%) and ratings volume (270 vs 17). KDIAG's advantage is monetization model (free vs paid). On price, update cadence, 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.
ThinkDriver holds the better App Store score, 4.5 against 3.4. That said, the two scores are not equally well evidenced: ThinkDriver has 270 ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 58% of ThinkDriver's written reviews are positive against 33% of KDIAG's.
ThinkDriver ships an update monthly, KDIAG every 3 weeks. The most recent releases landed on September 19, 2026 and September 21, 2026 respectively.
| Parameter | ThinkDriver | KDIAG |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (270 ratings) — better | 3.4 (17 ratings) |
| Positive reviews | 57.6% of reviews — better | 33.3% of reviews |
| Number of ratings | 270 — better | 17 |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 325 MB | 74 MB |
| Age rating | 17+ | 4+ |
| Developer | THINKCAR INC | 祖策 谢 |
Customer experience
ThinkDriver
KDIAG
Bugs and requests
ThinkDriver
Reported bugs
10 issues- Keeps shutting down during scan
- Scanner does not work
- Not working with 2022 subscription update
- Device won't work after getting a new phone
- Keeps asking to activate device, then pay again
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- Doesn't recognize older cars (pre-2014)
- App ALWAYS crashes
- Machine doesn't read VIN
- App falls when needing special functions
- Doesn't work when VIN manual entry fails
Requested features
2 requests- Add payment with Apple Cash
- Install just a code scanner icon
KDIAG
Not enough reviews yet to summarise bugs or requests.
In-app purchases
ThinkDriver
No in-app purchases
KDIAG
No in-app purchases
