# OTG Flash Pro vs USB File

OTG Flash Pro and USB File are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | OTG Flash Pro | USB File |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | — |
| Size | 136 MB | 7 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [裕雨 程](https://appshunter.io/developer/1079877476) | [Gaoming Zhang](https://appshunter.io/developer/6789055498) |

## What reviewers say

### OTG Flash Pro

[App page](https://appshunter.io/ios/app/otg-flash-pro/id6752880818)

**In-app purchases:** none


### USB File

[App page](https://appshunter.io/ios/app/usb-file/id6795836260)

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

**In-app purchases:** none


## Frequently asked questions

### Is OTG Flash Pro free?

OTG Flash Pro is free to download, with no in-app purchases.

### Is USB File free?

USB File is free to download, with no in-app purchases.

### Do OTG Flash Pro or USB File have ads?

Neither OTG Flash Pro nor USB File 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.*