# ELMCheck vs UJS OBDII

The clearest difference is in-app purchases: UJS OBDII at none against ELMCheck's 1. UJS OBDII also leads on iOS requirement (13 vs 18). ELMCheck's advantage is update cadence (every 10 days vs every 6 weeks). On price, rating, review sentiment and ratings volume there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for ELMCheck against 5.0 for UJS OBDII. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

ELMCheck ships an update every 10 days, UJS OBDII every 6 weeks. The most recent releases landed on September 16, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | ELMCheck | UJS OBDII |
| --- | --- | --- |
| 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/ujs-obdii/id6753165961/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 6 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 6 MB | 81 MB |
| Requires iOS | 18 | **13** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fearless design, LLC](https://appshunter.io/developer/321056993) | [UJS INC](https://appshunter.io/developer/1842801577) |

## 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 |


### UJS OBDII

[App page](https://appshunter.io/ios/app/ujs-obdii/id6753165961)

This professional car diagnostic app connects to UJS OBDII devices via Bluetooth to read and clear fault codes, monitor real-time vehicle performance, and analyze travel data. It supports multiple languages and offers high-speed, low-power data transmission.

**Highlights:** Fault code reading and clearing, Real-time instrument panel display, Vehicle performance testing, Detailed travel analysis, Multi-language support, High-speed data transmission, Low-power consumption

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ELMCheck free?

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

### Is UJS OBDII free?

UJS OBDII is free to download, with no in-app purchases.

### Which has better reviews, ELMCheck or UJS OBDII?

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

### Do ELMCheck or UJS OBDII have ads?

Neither ELMCheck nor UJS OBDII shows ads.

### Which is updated more often, ELMCheck or UJS OBDII?

ELMCheck ships an update every 10 days, and UJS OBDII every 6 weeks. Most recently, ELMCheck was updated on September 16, 2026 and UJS OBDII on June 1, 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.*