ThinkDiag+ vs Dollarfix
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
Dollarfix
A social platform for car enthusiasts to share content, join communities, and get expert advice. It also offers vehicle diagnostic services, connecting to devices for OBD functions and maintenance checks.
- Automotive content sharing and discussion
- Create and join car communities
- Real-time car news and updates
- Connect with car experts
- Software diagnostic function
- OBD functions and vehicle maintenance
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dollarfix is a social media platform suitable for every car enthusiast. Whether you are an ordinary car owner, a maintenance engineer, a DIY enthusiast, a social media influencer, or any user who is interested in cars, you can participate in hot topics, post and browse interesting and useful content, as well as create and join favorite communities on dollarfix. dollarfix focuses on the sharing and discussion of various automotive content, ranging from the brand history of cars, model comparisons, performance evaluations to modification techniques and so on. You can find any car-related topics that come to your mind. Each automotive topic can have its own dedicated discussion section, where you can share your own stories about your beloved cars, show off the wonderful moments with your cars, or explore the little secrets of car maintenance. It gathers automotive information sources from all over the world and provides users with the most timely and accurate car news. Whether it's the release of new cars, vehicle recall information, or the latest developments in the automotive industry, all can be delivered to you as soon as possible. It's easy to find fellow car enthusiasts on dollarfix. It's of great help in aspects like car maintenance. When your car has a strange malfunction, you can ask car owners with the same model for advice on dollarfix. They may have already encountered the same problem and know how to solve it. Meanwhile, car owners can also organize self-driving tour activities together, plan unique car travel routes, and share the beautiful scenery and interesting stories during the journey. Moreover, the official will also organize car enthusiasts' activities regularly to jointly build the community. dollarfix has invited numerous experts in the automotive industry to join the app. They have profound achievements in various fields such as automotive engineering, design, and maintenance. Whether you are curious about the working principle of car engines or are hesitant when choosing a car, you can ask the experts questions and get professional answers. It's just like having a team of car consultants who are always online to safeguard your car life. dollarfix is equipped with a software diagnostic function and is an application that can provide users with vehicle diagnostic services. It can connect with diagnostic devices via Bluetooth to achieve a full range of services such as OBD (On-Board Diagnostics) functions, enhanced system diagnostics, and vehicle maintenance. This enables you to easily check the health status of your vehicle and quickly locate the causes of vehicle failures without having to go to an auto repair shop.
Screenshots
Verdict
The clearest difference is monetization model: Dollarfix at free against ThinkDiag+'s free with in-app purchases. Dollarfix also leads on review sentiment (90% vs 74%) and rating (4.7 vs 4.5). ThinkDiag+'s advantage is ratings volume (4.3K vs 57). 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.
Dollarfix holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: ThinkDiag+ has 4.3K ratings behind it against 57, 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 90% of Dollarfix's.
Both ship on a similar rhythm, roughly every 3 weeks. Both last shipped on September 22, 2026.
| Parameter | ThinkDiag+ | Dollarfix |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (4.3K ratings) | 4.7 (57 ratings) — better |
| Positive reviews | 73.6% of reviews | 90.3% of reviews — better |
| Number of ratings | 4.3K — better | 57 |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 539 MB | 888 MB |
| Age rating | 17+ | 17+ |
| Developer | THINKCAR INC | MATL TECH INC. |
Customer experience
ThinkDiag+
Dollarfix
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
Dollarfix
Not enough reviews yet to summarise bugs or requests.
In-app purchases
ThinkDiag+
No in-app purchases
Dollarfix
No in-app purchases









