# AIOBD13 vs ELMCheck

The clearest difference is review sentiment: ELMCheck at 100% against AIOBD13's 50%. ELMCheck also leads on rating (5.0 vs 1.0) and update cadence (every 2 weeks vs every 2 months). AIOBD13's advantage is in-app purchases (none vs 1) and iOS requirement (7.0 vs 18.0). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. ELMCheck sells 1 one-off in-app purchase. AIOBD13 asks for nothing beyond the download.

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: 50% of AIOBD13's written reviews are positive against 100% of ELMCheck's.

AIOBD13 ships an update every 2 months, ELMCheck every 2 weeks. The most recent releases landed on September 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | AIOBD13 | ELMCheck |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (2 ratings)](https://appshunter.io/ios/app/aiobd13/id958457297/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/elmcheck/id6479630442/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 52 MB | 14 MB |
| Requires iOS | **7.0** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [翔宇 金](https://appshunter.io/developer/528881861) | [Fearless design, LLC](https://appshunter.io/developer/321056993) |

## What reviewers say

### AIOBD13

[App page](https://appshunter.io/ios/app/aiobd13/id958457297)

Connects to your vehicle's diagnostic system via Bluetooth to read and log engine data on iOS devices. Monitor your car's performance and driving habits to improve MPG and maintain optimal operation.

**Highlights:** Bluetooth diagnostic system connection, Reads and logs engine data, Monitors vehicle conditions, Improves MPG tracking, Tracks driving habits, Supports OBDII/EOBD compliant vehicles since 1996

**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 AIOBD13 free?

AIOBD13 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, AIOBD13 or ELMCheck?

ELMCheck is rated higher. AIOBD13 averages 1.0 out of 5 from 2 ratings, while ELMCheck averages 5.0 from 1 ratings.

### Do AIOBD13 or ELMCheck have ads?

Neither AIOBD13 nor ELMCheck shows ads.

### Which is updated more often, AIOBD13 or ELMCheck?

AIOBD13 ships an update every 2 months, and ELMCheck every 2 weeks. Most recently, AIOBD13 was updated on September 25, 2026 and ELMCheck on October 24, 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.*