# OTG Flash Pro vs iStorex PRO

The clearest difference is device support: OTG Flash Pro at 3 against iStorex PRO's 1. OTG Flash Pro also leads on iOS requirement (14.0 vs 16.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

OTG Flash Pro ships an update every 10 days, iStorex PRO every 11 days. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | OTG Flash Pro | iStorex PRO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 11 days |
| Size | 136 MB | 7 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [裕雨 程](https://appshunter.io/developer/1079877476) | [i-MICA Innovative Technology Co.,Ltd](https://appshunter.io/developer/972558108) |

## What reviewers say

### OTG Flash Pro

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

**In-app purchases:** none


### iStorex PRO

[App page](https://appshunter.io/ios/app/istorex-pro/id6757896861)

**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 iStorex PRO free?

iStorex PRO is free to download, with no in-app purchases.

### Do OTG Flash Pro or iStorex PRO have ads?

Neither OTG Flash Pro nor iStorex PRO shows ads.

### Which is updated more often, OTG Flash Pro or iStorex PRO?

OTG Flash Pro ships an update every 10 days, and iStorex PRO every 11 days. Most recently, OTG Flash Pro was updated on October 30, 2026 and iStorex PRO on October 25, 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.*