# USB Mobile Disk vs QAS

The clearest difference is review sentiment: USB Mobile Disk at 63% against QAS's 14%. USB Mobile Disk also leads on update cadence (every 3 months vs every 13 months). QAS's advantage is price (Free vs $0.99) and ads (none vs shown). On in-app purchases and device support there is nothing between them.

QAS 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, QAS every 13 months. The most recent releases landed on October 16, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | USB Mobile Disk | QAS |
| --- | --- | --- |
| 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** | 14.3% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 13 months |
| Monetization | Paid | **Free** |
| Size | 28 MB | 146 MB |
| Requires iOS | 12.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Raphael Odermatt](https://appshunter.io/developer/403027529) | [PEARL. GmbH](https://appshunter.io/developer/619231875) |

## 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


### QAS

[App page](https://appshunter.io/ios/app/qas-player/id1230907047)

Control up to 8 speakers individually on your iPhone or iPad to play music from your library or online streaming services. Enjoy synchronized music across multiple rooms or play different songs in each.

**Highlights:** Individual speaker control, Multiroom audio synchronization, Music library playback, Online streaming service integration, Control up to 8 speakers

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

**In-app purchases:** none


## Frequently asked questions

### Is USB Mobile Disk free?

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

### Is QAS free?

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

### Do USB Mobile Disk or QAS have ads?

USB Mobile Disk shows ads; QAS does not.

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

USB Mobile Disk ships an update every 3 months, and QAS every 13 months. Most recently, USB Mobile Disk was updated on October 16, 2026 and QAS on October 15, 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.*