ThinkDiag+ vs TOPDON CarPal
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ThinkDiag+
This app provides professional-level vehicle diagnostics, offering features like reading/clearing fault codes, data flow analysis, and special maintenance functions. It supports a wide range of car brands and allows users to subscribe to specific diagnostic software. Connects via Bluetooth to your smartphone for intelligent vehicle analysis.
- OE-level diagnostic functions
- Full OBD II diagnosis
- Special maintenance functions
- Supports 100+ vehicle brands
- Automatic VIN reading
- Professional diagnostic reports
- In-app user community
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1. Profession functions refer to OE level functions, such as read/clear code, data flow diagram, read ECU, drive test, bidirectional special functions, etc. 2. Support full-function OBD II diagnosis, read data flow, freeze frame read IM/real-time data, read/clear fault code, vehicle on-board monitoring/computer system control operation and read vehicle information. 3. Support vehicle maintenance light return to normal. 4. Select any vehicle diagnostic software, covering up to 39 major automobile manufacturers. 5. Support automatic VIN reading and one-key diagnosis. 6. Clear interpretation of fault codes and generate professional diagnostic reports. 7. Be able to communicate with other users within the ThinkDiag community (share/help/support). Not only for "ThinkDiag" and "ThinkDiag 2" device, but also works for "ThinkDiag Mini", "ThinkDirver", and "Thinkcar Pro" devices. ThinkDiag, an innovative vehicle diagnostic tool, is specially designed for repair technicians, small and medium-sized repair shops, and DIYers, to achieve the original manufacturer level diagnostic performance. It supports more than 100 vehicle brands of diagnostic services, including 15 special maintenance reset functions. ThinkDiag is as good as those comprehensive diagnostic equipment costed thousands of dollars. ThinkDiag is also an intelligent diagnostic device. Connecting with smartphone via Bluetooth, it is controlled to work by app. In the app, there is a diagnostic software store, and users can subscribe for diagnostic software according to their needs. ***Contact Us W: www.mythinkcar.com E: service@mythinkcar.com P: +1 833-692-2766 2151 S Haven Ave Unit 203 Ontario CA 91761 USA
TOPDON CarPal
Transform your phone into a powerful car diagnostic tool with this app. It offers comprehensive system scans, full OBDII functionality, and specialized maintenance services for a wide range of vehicle brands. Easily identify issues, access repair data, and generate detailed reports wirelessly.
- Full System Diagnosis
- Full OBD2 Functions
- 6 Special Maintenance Functions
- AutoVIN Vehicle Identification
- Wireless Bluetooth 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 60 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. Terms of Use (EULA): https://plat.topdon.com/topdon-plat/out-user/baseinfo/template/getHtmlContentById?softCode=Car_Pal_DisplaySW_iOS&language=7&type=25
Screenshots
Verdict
The clearest difference is rating: ThinkDiag+ at 4.5 against TOPDON CarPal's 3.7. ThinkDiag+ also leads on in-app purchases (none vs 18) and review sentiment (74% vs 39%). On price, update cadence, ads and monetization model 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. TOPDON CarPal sells 18 in-app purchases, starting at $4.99 per month. ThinkDiag+ asks for nothing beyond the download.
ThinkDiag+ holds the better App Store score, 4.5 against 3.7. That said, the two scores are not equally well evidenced: ThinkDiag+ has 4.3K ratings behind it against 41, so its average is the more settled of the two. Written reviews point the same way: 74% of ThinkDiag+'s written reviews are positive against 39% of TOPDON CarPal's.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 22, 2026 and September 23, 2026 respectively.
| Parameter | ThinkDiag+ | TOPDON CarPal |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (4.3K ratings) — better | 3.7 (41 ratings) |
| Positive reviews | 73.6% of reviews — better | 39.3% of reviews |
| Number of ratings | 4.3K — better | 41 |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 | 11 — better |
| Further details — not scored | ||
| Size | 539 MB | 1.6 GB |
| Age rating | 17+ | 4+ |
| Developer | THINKCAR INC | HK TOPDON TECHNOLOGY Co., LIMITED |
Customer experience
ThinkDiag+
TOPDON CarPal
Bugs and requests
ThinkDiag+
Reported bugs
3 issues- Failure to recognize VIN or vehicle information
- Inability to clear certain error codes
- Inconsistent performance across different devices
Requested features
4 requests- Improved user interface and navigation
- More detailed troubleshooting guides
- Expanded vehicle coverage and special functions
- Offline mode for diagnostics
TOPDON CarPal
Not enough reviews yet to summarise bugs or requests.
In-app purchases
ThinkDiag+
No in-app purchases
TOPDON CarPal
- Monthly Auto-renewal$4.991 Month
- Renewal Bundle$29.991 Year
- Nissan Gateway 1-Token$11.99
- Renault Gateway 1-Token$11.99
- VW SFD Gateway 1-Token$11.99
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- FCA Gateway 1-Token$11.99
- FCA Gateway 30-day Access$34.99
- VW SFD Gateway 30-day Access$34.99
- Renault Gateway 5 Tokens$116.99
- Nissan Gateway 5 Tokens (EU only)$116.99
- Renault Gateway 5 Tokens$147.99
- VW SFD Gateway 1-year Access$199.99
- Renault Gateway 10 Tokens$209.99
- Nissan Gateway 10 Tokens (EU only)$209.99
- Nissan Gateway 10 Tokens (EU only)$254.99
- Renault Gateway 20 Tokens$379.00
- Nissan Gateway 20 Tokens (EU only)$379.00
- Nissan Gateway 20 Tokens (EU only)$464.99
Questions
Is ThinkDiag+ free?
Is TOPDON CarPal free?
Which has better reviews, ThinkDiag+ or TOPDON CarPal?
Do ThinkDiag+ or TOPDON CarPal have ads?
Which is updated more often, ThinkDiag+ or TOPDON CarPal?
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