Comparison

iSmartDiag vs AutoOBDII

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 and diagnose over 110 vehicle brands, offering detailed reports and maintenance functions to save time and costs.

Highlights
  • 110+ vehicle brands coverage
  • Full system scan & diagnosis
  • Bi-directional control
  • Read/erase fault codes
  • Data stream graph display
  • Maintenance functions (reset, coding)
  • 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

AutoOBDII

This application connects to your vehicle via Bluetooth to perform diagnostics and offer driving assistance. It can read and clear fault codes, analyze performance, and track your journeys. Supports multiple languages and high-speed data transmission.

Highlights
  • Bluetooth vehicle communication
  • Fault code reading and clearing
  • Instrument panel monitoring
  • Performance testing
  • Travel analysis
  • High-speed data transmission
  • Low power consumption
Features
Read full description

AutoOBDII is a car diagnostic and monitoring application,support English,Español,Русский,Deutsch,Français,日本語,中文,Italiano,한국어,Português. Through phone, use Bluetooth to communicate with the vehicle terminal to complete fault diagnosis and driving assistance functions. It has automobile detection and analysis functions such as fault code reading and clearing, instrument panel, performance test, and travel analysis. It also supports high-speed data transmission and has the advantages of low power consumption and ultra-power saving. caution: 1. Support the adapter that runs through Bluetooth 4.0/5.0. 2. The parameters supported by each vehicle are different, which has nothing to do with AutoOBDII, but is related to the vehicle control unit. 3. AutoOBDII supports LONAUTO series products.

Screenshots

iSmartDiag4 screens
AutoOBDII2 screens

Verdict

The call

The clearest difference is rating: AutoOBDII at 5.0 against iSmartDiag's 1.0. AutoOBDII also leads on iOS requirement (13 vs 15.5). iSmartDiag's advantage is update cadence (every 4 days vs every 4 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

AutoOBDII holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

iSmartDiag ships an update every 4 days, AutoOBDII every 4 months. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.

Scorecard3 real differences · 7 level
iSmartDiag versus AutoOBDII: the parameters behind the verdict, then further details
ParameteriSmartDiagAutoOBDII
PriceFreeFree
Rating1.0 (2 ratings)5.0 (1 ratings) — better
Positive reviews25.0% of reviews—
Number of ratings2 — better1
Update frequencyEvery 4 days — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.513 — better
Further details — not scored
Size615 MB83 MB
Age rating9+17+
DeveloperShenzhen Vident Technology Co., LtdShenzhen Lonauto Technology Co., Ltd.

Customer experience

iSmartDiag

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

AutoOBDII

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

iSmartDiag

No in-app purchases

None

AutoOBDII

No in-app purchases

Questions

Is iSmartDiag free?
iSmartDiag is free to download, with no in-app purchases.
Is AutoOBDII free?
AutoOBDII is free to download, with no in-app purchases.
Which has better reviews, iSmartDiag or AutoOBDII?
AutoOBDII is rated higher. iSmartDiag averages 1.0 out of 5 from 2 ratings, while AutoOBDII averages 5.0 from 1 ratings.
Do iSmartDiag or AutoOBDII have ads?
Neither iSmartDiag nor AutoOBDII shows ads.
Which is updated more often, iSmartDiag or AutoOBDII?
iSmartDiag ships an update every 4 days, and AutoOBDII every 4 months. Most recently, iSmartDiag was updated on November 7, 2026 and AutoOBDII on November 4, 2026.

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