# M100 vs ELMCheck

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.

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.

## The numbers

| Metric | M100 | ELMCheck |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (6 ratings)](https://appshunter.io/ios/app/m100/id1619029812/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/elmcheck/id6479630442/reviews)** |
| Number of ratings | **6** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 97 MB | 6 MB |
| Requires iOS | **10.0** | 18 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Chaoyue Technology Development Co.,Ltd](https://appshunter.io/developer/1223781320) | [Fearless design, LLC](https://appshunter.io/developer/321056993) |

## What reviewers say

### M100

[App page](https://appshunter.io/ios/app/m100/id1619029812)

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:** macOS Compatibility

**In-app purchases:** none


### ELMCheck

[App page](https://appshunter.io/ios/app/elmcheck/id6479630442)

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:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Comprehensive testing | $2.99 | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*