# UJS OBD Pro vs E10 Fuel Compatibility Check

The clearest difference is in-app purchases: UJS OBD Pro at none against E10 Fuel Compatibility Check's 3. UJS OBD Pro also leads on iOS requirement (13 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. E10 Fuel Compatibility Check sells 3 in-app purchases, starting at $2.99 per 7 days. UJS OBD Pro asks for nothing beyond the download.

## The numbers

| Metric | UJS OBD Pro | E10 Fuel Compatibility Check |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Size | 148 MB | 9 MB |
| Requires iOS | **13** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [UJS INC](https://appshunter.io/developer/1842801577) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### UJS OBD Pro

[App page](https://appshunter.io/ios/app/ujs-obd-pro/id6761961923)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### E10 Fuel Compatibility Check

[App page](https://appshunter.io/ios/app/e10-fuel-compatibility-check/id6779277548)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Octane Ratings – Weekly | $2.99 | per 7 days |
| Engine Safety – Yearly | $14.99 | per year |
| Gasoline Guide, Pay Once | $29.99 | one-time |


## Frequently asked questions

### Is UJS OBD Pro free?

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

### Is E10 Fuel Compatibility Check free?

E10 Fuel Compatibility Check is free to download, with in-app purchases available.

### Do UJS OBD Pro or E10 Fuel Compatibility Check have ads?

Neither UJS OBD Pro nor E10 Fuel Compatibility Check shows ads.

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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.*