# ELMCheck vs OBD Quest

The clearest difference is ads: ELMCheck at none against OBD Quest's shown. OBD Quest's advantage is iOS requirement (14.0.0 vs 18). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. ELMCheck sells 1 one-off in-app purchase and OBD Quest sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for ELMCheck against 5.0 for OBD Quest. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

ELMCheck ships an update every 10 days, OBD Quest every 3 weeks. The most recent releases landed on October 3, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | ELMCheck | OBD Quest |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/elmcheck/id6479630442/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/obd-quest/id6496854120/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 6 MB | 54 MB |
| Requires iOS | 18 | **14.0.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fearless design, LLC](https://appshunter.io/developer/321056993) | [Shop Booster Ltd](https://appshunter.io/developer/1741157179) |

## What reviewers say

### 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 |


### OBD Quest

[App page](https://appshunter.io/ios/app/obd-quest/id6496854120)

Decode and understand car diagnostic trouble codes with this comprehensive interpreter. It provides detailed insights into fault codes, potential causes, and repair recommendations, complementing your existing OBD2 scanning tools. Access a vast database of codes across multiple languages and car brands to diagnose issues with confidence.

**Highlights:** Interpretation of over 85,000 OBD2 codes, Multilingual support (English, French, Italian, German, Portuguese, Spanish), Extensive coverage across auto makes and brands, Detailed insights for each code search, Unlimited code searches, AI-powered code interpretation

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro Plan | $9.99 | per month |
| Yearly Pro Plan | $99.99 | per year |
| Pro Plan for 3 days only | $0.99 | one-time |


## Frequently asked questions

### Is ELMCheck free?

ELMCheck is free to download, with in-app purchases available.

### Is OBD Quest free?

OBD Quest is free to download, with in-app purchases available.

### Which has better reviews, ELMCheck or OBD Quest?

ELMCheck and OBD Quest are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do ELMCheck or OBD Quest have ads?

OBD Quest shows ads; ELMCheck does not.

### Which is updated more often, ELMCheck or OBD Quest?

ELMCheck ships an update every 10 days, and OBD Quest every 3 weeks. Most recently, ELMCheck was updated on October 3, 2026 and OBD Quest on October 2, 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.*