# USB Sharp vs Kantu

The clearest difference is price: USB Sharp at Free against Kantu's $1.99. USB Sharp also leads on rating (3.1 vs 1.5) and review sentiment (53% vs 31%). Kantu's advantage is in-app purchases (none vs 6) and ads (none vs shown).

USB Sharp is free to download; Kantu costs $1.99 up front. USB Sharp sells 6 one-off in-app purchases. Kantu asks for nothing beyond the download.

USB Sharp holds the better App Store score, 3.1 against 1.5. That said, the two scores are not equally well evidenced: USB Sharp has 18 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 53% of USB Sharp's written reviews are positive against 31% of Kantu's.

USB Sharp ships an update every 3 weeks, Kantu every 9 days. The most recent releases landed on September 21, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | USB Sharp | Kantu |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[3.1 (18 ratings)](https://appshunter.io/ios/app/usb-sharp/id427762463/reviews)** | [1.5 (2 ratings)](https://appshunter.io/ios/app/kantu-image-viewer/id1458706066/reviews) |
| Number of ratings | **18** | 2 |
| Positive reviews | **53.2% of reviews** | 30.8% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 55 MB | 17 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [锦文 游](https://appshunter.io/developer/406832160) | [俊锋 仝](https://appshunter.io/developer/1209824000) |

## What reviewers say

### USB Sharp

[App page](https://appshunter.io/ios/app/usb-sharp/id427762463)

Transform your iPhone or iPad into a portable wireless storage disk for efficient file management. Upload multiple files via Chrome and Firefox, extract encrypted RAR archives, and organize documents, photos, and videos with ease.

**Highlights:** Portable wireless storage, File management, Multiple file upload, Encrypted archive extraction, Document reader, Photo viewer, Video player

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $0.99 | one-time |
| Music Player | $0.99 | one-time |
| Dropbox | $0.99 | one-time |
| Video Player | $0.99 | one-time |
| SkyDrive | $0.99 | one-time |
| Full Version | $2.99 | one-time |


### Kantu

[App page](https://appshunter.io/ios/app/kantu-image-viewer/id1458706066)

This tool allows you to view a wide range of image formats, including those not natively supported by your device. It integrates with your file system and other apps to open image files, offering thumbnail previews and Quick Look functionality.

**Highlights:** External image browsing, Support for unsupported formats, System native file system integration, Open image files from other apps, Image file thumbnails, Quick Look support

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

**In-app purchases:** none


## Frequently asked questions

### Is USB Sharp free?

USB Sharp is free to download, with in-app purchases available.

### Is Kantu free?

Kantu costs $1.99, with no in-app purchases.

### Which has better reviews, USB Sharp or Kantu?

USB Sharp is rated higher. USB Sharp averages 3.1 out of 5 from 18 ratings, while Kantu averages 1.5 from 2 ratings.

### Do USB Sharp or Kantu have ads?

USB Sharp shows ads; Kantu does not.

### Which is updated more often, USB Sharp or Kantu?

USB Sharp ships an update every 3 weeks, and Kantu every 9 days. Most recently, USB Sharp was updated on September 21, 2026 and Kantu on September 26, 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.*