# USB Mobile Disk vs OpSec Purchase

The clearest difference is price: OpSec Purchase at Free against USB Mobile Disk's $0.99. OpSec Purchase also leads on ads (none vs shown). USB Mobile Disk's advantage is update cadence (every 3 months vs every 7 months). On in-app purchases, device support and iOS requirement there is nothing between them.

OpSec Purchase is free to download; USB Mobile Disk costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

USB Mobile Disk ships an update every 3 months, OpSec Purchase every 7 months. The most recent releases landed on August 1, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | USB Mobile Disk | OpSec Purchase |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.3 (10 ratings)](https://appshunter.io/ios/app/usb-mobile-disk/id505848112/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 62.5% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 7 months |
| Monetization | Paid | — |
| Size | 28 MB | 8 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Raphael Odermatt](https://appshunter.io/developer/403027529) | [Opsec Security Group, Inc.](https://appshunter.io/developer/1046385060) |

## What reviewers say

### USB Mobile Disk

[App page](https://appshunter.io/ios/app/usb-mobile-disk/id505848112)

This app turns your iPhone or iPad into a portable storage device, allowing you to carry documents, music, and videos. It features a built-in file manager, music player, PDF reader, and supports various file transfer methods.

**Highlights:** Portable storage for iPhone/iPad, Advanced file manager, Background music player, PDF reader, Gallery import/export, FTP and HTTP file access, ZIP file creation/extraction

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

**In-app purchases:** none


### OpSec Purchase

[App page](https://appshunter.io/ios/app/opsec-purchase/id1525722092)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is USB Mobile Disk free?

USB Mobile Disk costs $0.99, with no in-app purchases.

### Is OpSec Purchase free?

OpSec Purchase is free to download, with no in-app purchases.

### Do USB Mobile Disk or OpSec Purchase have ads?

USB Mobile Disk shows ads; OpSec Purchase does not.

### Which is updated more often, USB Mobile Disk or OpSec Purchase?

USB Mobile Disk ships an update every 3 months, and OpSec Purchase every 7 months. Most recently, USB Mobile Disk was updated on August 1, 2026 and OpSec Purchase on September 17, 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.*