M100 vs ELMCheck
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Fault code reading and clearing
- Instrument panel display
- Performance testing
- Driving analysis
- Bluetooth 4.0 adapter support
- Multi-language support
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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.
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.
- 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
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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
Verdict
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
Both are free to download. ELMCheck sells 1 one-off in-app purchase. M100 asks for nothing beyond the download.
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.
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.
| Parameter | M100 | ELMCheck |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (6 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 6 — better | 1 |
| Update frequency | Every 3 weeks | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 10.0 — better | 18 |
| Further details — not scored | ||
| Size | 97 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Chaoyue Technology Development Co.,Ltd | Fearless design, LLC |
Customer experience
M100
ELMCheck
In-app purchases
M100
No in-app purchases
ELMCheck
- Comprehensive testing$2.99









