Comparison

iSmartDiag vs ThinkCar Bay

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

iSmartDiag

This app provides powerful automotive diagnostic functions for mechanics, drivers, and DIYers. It connects via Bluetooth to scan over 110 vehicle brands, read/erase fault codes, and perform active tests. Save time and costs with detailed reports and maintenance functions.

Highlights
  • 110+ vehicle brands coverage
  • Full system scan & diagnosis
  • Bi-directional control
  • Read/erase fault codes
  • Maintenance functions
  • Data stream graph display
  • Bluetooth connectivity
Features
Read full description

According to connect with mobile or tablet bluetooth, the iSmartDiag can work on vehicles properly and provide powerful diagnostic functions to mechanics. In addition, the iSmartDiag can help drivers, DIYers and workshops save plenty of time and costs. Main Features: 1. 110+ vehicle brands coverage with full system scan & diagnosis 2. Support latest CANFD& DoIP communication protocols diagnosis 3. Bi-directional control and easy pin-point faults 4. Support full system scan & diagnosis: engine, transmission, SRS, TPMS, ABS, ESP, IMMO and etc. 5. Full system basic diagnostic functions including read/erase fault code, read system information, freeze frame data, read data stream, active tests. 6. iSmartDiag510 covered 13 maintenance functions; iSmartDiag510Pro covered 28 maintenance function, like service reset, EPB, DPF, injector coding etc. 7. Data stream graph display and comparison 8. Support fault code emailing function to certain email address(This function is used to send diagnostic report email to drivers by workshop), diagnostic report and vehicle quick scan report. 9. Bluetooth connection based on mobile devices, efficiency connection distance within 10 meters. 10. Support one-touch diagnostic complaint. Welcome to the forefront of automotive diagnostic technology. Vident Tech offers state-of-the-art solutions based on OBD and OBDII. We are on par with renowned brands like Autel, Xtool, and Launch, providing you with accurate and reliable results for mileage checking, emission status, and engine diagnostics. Vident Tech aimed to deliver the best diagnostic solutions for mechanics. Whether it's routine maintenance or emergency situations, with outstanding performance and user-friendly interfaces, Vident products can help you quickly identify issues. Our advanced diagnostic tool, the iSmart Diag application, allows you to effortlessly access to vehicle data and generate comprehensive reports. Whether it's reading mileage, evaluating emissions, or diagnosing engine issues, iSmart Diag can meet your needs. By choosing Vident Tech, you'll receive dependable and precise solutions that enhance your driving experience. Don't missing the opportunity to experience Vident Tech's advanced diagnostic technology. We are your trusted partner in the field of automotive diagnostics. Let's explore the convenient features of iSmart Diag together and effortlessly resolve your car repair issues. Download the iSmart Diag application now and revolutionize the way you maintain and repair your car. iSmart Diag is an intelligent automotive diagnostic application that helps you monitor and address car problems in real-time, optimizing your driving experience. It offers comprehensive and accurate diagnostic functions, including reading and clearing fault codes, monitoring sensor data, and active tests. With precise diagnostic results, help to better understand vehicle status and take timely maintenance measures to avoid potential failures. It can monitor various parameters of your vehicle in real-time, such as speed, fuel consumption, assisting you in gaining a comprehensive understanding of your vehicle. Additionally, it provides real-time data charts and reports, enabling you to analyze your vehicle's operating conditions more clearly. The iSmart Diag interface is designed to be simple and intuitive, ensuring ease and convenience of operation. Which allows entry level users to perform automotive diagnostics and troubleshooting. Whether you're an automotive enthusiasts or drivers, you can easily get started with it. Vident Tech team will continuously updates and optimizes the application's features to provide better user experience and functional support. Additionally, we offer timely technical support and online help documentation to ensure that you receive the necessary assistance and guidance while using iSmart Diag.

About

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.

Highlights
  • Product tutorials
  • Case studies
  • After-sales service
  • User product management
  • Online diagnostic report viewing
Features
Read full description

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.

Screenshots

iSmartDiag4 screens
ThinkCar Bay4 screens

Verdict

The call

The clearest difference is rating: ThinkCar Bay at 3.8 against iSmartDiag's 1.0. ThinkCar Bay also leads on review sentiment (50% vs 25%) and iOS requirement (9.0 vs 15.5). iSmartDiag's advantage is update cadence (every 4 days vs every 5 months). On price, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ThinkCar Bay holds the better App Store score, 3.8 against 1.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews point the same way: 25% of iSmartDiag's written reviews are positive against 50% of ThinkCar Bay's.

UpkeepUpdate frequency

iSmartDiag ships an update every 4 days, ThinkCar Bay every 5 months. The most recent releases landed on October 27, 2026 and October 21, 2026 respectively.

Scorecard4 real differences · 6 level
iSmartDiag versus ThinkCar Bay: the parameters behind the verdict, then further details
ParameteriSmartDiagThinkCar Bay
PriceFreeFree
Rating1.0 (2 ratings)3.8 (4 ratings) — better
Positive reviews25.0% of reviews50.0% of reviews — better
Number of ratings24 — better
Update frequencyEvery 4 days — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.59.0 — better
Further details — not scored
Size614 MB215 MB
Age rating9+17+
DeveloperShenzhen Vident Technology Co., LtdTHINKCAR INC

Customer experience

iSmartDiag

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews4 reviews
Positive25.0%
Neutral0.0%
Negative75.0%

ThinkCar Bay

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

iSmartDiag

No in-app purchases

None

ThinkCar Bay

No in-app purchases

Questions

Is iSmartDiag free?
iSmartDiag is free to download, with no in-app purchases.
Is ThinkCar Bay free?
ThinkCar Bay is free to download, with no in-app purchases.
Which has better reviews, iSmartDiag or ThinkCar Bay?
ThinkCar Bay is rated higher. iSmartDiag averages 1.0 out of 5 from 2 ratings, while ThinkCar Bay averages 3.8 from 4 ratings.
Do iSmartDiag or ThinkCar Bay have ads?
Neither iSmartDiag nor ThinkCar Bay shows ads.
Which is updated more often, iSmartDiag or ThinkCar Bay?
iSmartDiag ships an update every 4 days, and ThinkCar Bay every 5 months. Most recently, iSmartDiag was updated on October 27, 2026 and ThinkCar Bay on October 21, 2026.

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