# ESR ProMax vs E10 Fuel Compatibility Check

The clearest difference is in-app purchases: ESR ProMax at none against E10 Fuel Compatibility Check's 3. ESR ProMax also leads on iOS requirement (15.0 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. ESR ProMax asks for nothing beyond the download.

## The numbers

| Metric | ESR ProMax | E10 Fuel Compatibility Check |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | — |
| Size | 65 MB | 9 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Suthipoj tripuwabhrut](https://appshunter.io/developer/1445632800) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### ESR ProMax

[App page](https://appshunter.io/ios/app/esr-promax/id6772112888)

**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 ESR ProMax free?

ESR ProMax 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 ESR ProMax or E10 Fuel Compatibility Check have ads?

Neither ESR ProMax 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.*