Comparison

M100 vs ELMCheck

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

Head to head
About

M100

This application connects to your vehicle via Bluetooth to provide diagnostic and monitoring functions. It allows you to read and clear fault codes, analyze driving performance, and view instrument panel data. Supports multiple languages and operates on low power.

Highlights
  • Fault code reading and clearing
  • Instrument panel display
  • Performance testing
  • Driving analysis
  • Bluetooth 4.0 adapter support
  • Multi-language support
Features
Read full description

M100 is a car diagnostic and monitoring application,support English,Español,Русский,Deutsch,Français,日本語,中文. Through iPhone and iPad, 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. 2. The parameters supported by each vehicle are different, which has nothing to do with M100, but is related to the vehicle control unit.

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

M1004 screens
ELMCheck4 screens

Verdict

The call

The clearest difference is rating: ELMCheck at 5.0 against M100's 3.3. ELMCheck also leads on update cadence (every 10 days vs every 3 weeks). M100's advantage is in-app purchases (none vs 1) and ratings volume (6 vs 1). On price, 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. M100 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ELMCheck holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: M100 has 6 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

M100 ships an update every 3 weeks, ELMCheck every 10 days. The most recent releases landed on October 6, 2026 and October 3, 2026 respectively.

Scorecard6 real differences · 4 level
M100 versus ELMCheck: the parameters behind the verdict, then further details
ParameterM100ELMCheck
PriceFreeFree
Rating3.3 (6 ratings)5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings6 — better1
Update frequencyEvery 3 weeksEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS10.0 — better18
Further details — not scored
Size97 MB6 MB
Age rating4+4+
DeveloperShenzhen Chaoyue Technology Development Co.,LtdFearless design, LLC

Customer experience

M100

All ratings6 ratings
Positive66.7%
Neutral0.0%
Negative33.3%

ELMCheck

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

In-app purchases

None

M100

No in-app purchases

1 purchases

ELMCheck

One-time1
  • Comprehensive testing$2.99

Questions

Is M100 free?
M100 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, M100 or ELMCheck?
ELMCheck is rated higher. M100 averages 3.3 out of 5 from 6 ratings, while ELMCheck averages 5.0 from 1 ratings.
Do M100 or ELMCheck have ads?
Neither M100 nor ELMCheck shows ads.
Which is updated more often, M100 or ELMCheck?
M100 ships an update every 3 weeks, and ELMCheck every 10 days. Most recently, M100 was updated on October 6, 2026 and ELMCheck on October 3, 2026.

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