# Usb Transfer vs OTG Flash Pro

The clearest difference is in-app purchases: OTG Flash Pro at none against Usb Transfer's 3. OTG Flash Pro also leads on update cadence (every 10 days vs every 3 weeks). Usb Transfer's advantage is iOS requirement (12.0 vs 14.0). On price, ads and device support there is nothing between them.

Both are free to download. Usb Transfer sells 3 in-app purchases, starting at $2.99 per month. OTG Flash Pro asks for nothing beyond the download.

Usb Transfer ships an update every 3 weeks, OTG Flash Pro every 10 days. The most recent releases landed on September 15, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Usb Transfer | OTG Flash Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Size | 91 MB | 136 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Changsha Fugui Bamboo Network Technology Co., Ltd.](https://appshunter.io/developer/1458061020) | [裕雨 程](https://appshunter.io/developer/1079877476) |

## What reviewers say

### Usb Transfer

[App page](https://appshunter.io/ios/app/usb-transfer/id6504265361)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月会员 | $2.99 | per month |
| 季会员 | $3.99 | per 3 months |
| 年会员 | $9.99 | per year |


### OTG Flash Pro

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

**In-app purchases:** none


## Frequently asked questions

### Is Usb Transfer free?

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

### Is OTG Flash Pro free?

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

### Do Usb Transfer or OTG Flash Pro have ads?

Neither Usb Transfer nor OTG Flash Pro shows ads.

### Which is updated more often, Usb Transfer or OTG Flash Pro?

Usb Transfer ships an update every 3 weeks, and OTG Flash Pro every 10 days. Most recently, Usb Transfer was updated on September 15, 2026 and OTG Flash Pro on September 12, 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.*