Comparison

iSmartDiag vs ELMCheck

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

ELMCheck

Verify the authenticity and functionality of your OBD-II scanner. This app runs comprehensive tests on ELM327 commands to report supported features, ensuring safe and reliable use with your vehicle.

Highlights
  • Authenticity testing for OBD-II scanners
  • Comprehensive ELM327 command test suite
  • Reports actual supported features
  • Ensures safe scanner usage
  • Basic tests are free
  • Unlock full suite with in-app purchase
Features
Read full description

Check the authenticity of your OBD-II scanner with ELMCheck. Most OBD-II scanners on the market use some variation of ELM327, but did you know that many scanners use clones of the original ELM327? It can be hard to tell, because these clones will work well enough for basic use but fail in unexpected scenarios. This is where ELMCheck comes in. ELMCheck offers a comprehensive set of test cases that cover the entire documented set of ELM327 commands. Regardless of which version your scanner says it is, ELMCheck can provide a comprehensive report of the features that are actually supported. Get the confidence you need to use your OBD-II scanner on your vehicle safely. ELMCheck is free to run basic tests. An in-app purchase will unlock the full test suite.

Screenshots

iSmartDiag4 screens
ELMCheck4 screens

Verdict

The call

The clearest difference is review sentiment: ELMCheck at 100% against iSmartDiag's 25%. ELMCheck also leads on rating (5.0 vs 1.0). iSmartDiag's advantage is in-app purchases (none vs 1) and update cadence (every 4 days vs every 2 weeks). On price, ratings volume, ads and device support 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. ELMCheck sells 1 one-off in-app purchase. iSmartDiag asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ELMCheck holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews point the same way: 25% of iSmartDiag's written reviews are positive against 100% of ELMCheck's.

UpkeepUpdate frequency

iSmartDiag ships an update every 4 days, ELMCheck every 2 weeks. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.

Scorecard6 real differences · 4 level
iSmartDiag versus ELMCheck: the parameters behind the verdict, then further details
ParameteriSmartDiagELMCheck
PriceFreeFree
Rating1.0 (2 ratings)5.0 (1 ratings) — better
Positive reviews25.0% of reviews100.0% of reviews — better
Number of ratings2 — better1
Update frequencyEvery 4 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.5 — better18.0
Further details — not scored
Size615 MB14 MB
Age rating9+4+
DeveloperShenzhen Vident Technology Co., LtdFearless design, LLC

Customer experience

iSmartDiag

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

ELMCheck

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

iSmartDiag

No in-app purchases

1 purchases

ELMCheck

One-time1
  • Comprehensive testing$2.99

Questions

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

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