USB Sharp vs Kantu
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
USB Sharp
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.
- Portable wireless storage
- File management
- Multiple file upload
- Encrypted archive extraction
- Document reader
- Photo viewer
- Video player
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USB Sharp can turn your iPhone, ipad, ipod into a large Capacity, Portable and Wireless storage disk, Facilitate and efficient manage of your files! -------------------------------------------------------- V1.1.1 Updates 1. Chrome and Firefox Supported upload multiple files 2. Extract files from encryption .rar -------------------------------------------------------- V1.1.0 Updates ** Optimization pdf reader ** Support for importing videos/photos to Photo Library ** Support for exporting video from Photo Library -------------------------------------------------------- V1.0.4 Updates ** Search file(folder) name function added ** Picture Viewer Improved ** Unzip type added -------------------------------------------------------- V1.0.3 Updates New Features: ** add authentication for local login ** add authentication for wifi transfer ** Sorting by file size -------------------------------------------------------- V1.0.2 Updates * E-book reader (.epub) * Encryption folder, protect your files * Images thumbnail * Full screen view files Supported -------------------------------------------------------- V1.0.1 Updates * Open files in other applications specifically as follows: **** Facilitate and efficient manage files * Sorting by file name、create time and file type * View, copy, move, delete, rename, email, zip Compression and unzip files/folders * Extract all files from a compressed .zip file * Glide deleting function * Select all and DeSelect all * Transferring files by wifi and itunes file sharing * Email multiple files, folder Supported * Photo import Supported * Landscape mode supported * iPad-compatible **** Facilitate and efficient view files * Photo View, Zoom, move * Players, support mp3、m4a、aac and mp4 * Document reader, .pdf .rtf .rtfd .doc .docx etc * Multi-touch Supported, Zoom files * Bookmark supported, fast file location **** Facilitate and efficient edit plain files * Convert plain file encoding (Unicode,UTF-8 etc) * Plain file content copy, cut, paste and replace * External file copy and paste **** Add plain text(default encoding UTF-8), photos(from Camera) and folders **** Support Simplified Chinese and English USBSharp support list of file types: e-book: .epub Plain text: .txt Document: .pdf .csv .rtf .rtfd .doc .docx .xls .xlsx .ppt .pptx (office 2003 or later) Image: .png .jpg .jpeg .gif .bmp .xbm .tif .tiff Audio: .mp3 .m4a .aac Video: .mp4 .mov .m4v .3gp Web: .htm .html .xhtml Compressed: .zip .rar
Kantu
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.
- External image browsing
- Support for unsupported formats
- System native file system integration
- Open image files from other apps
- Image file thumbnails
- Quick Look support
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Kantu is a image browsing tool that provides external image browsing support for images in other apps, such as email attachments. If you are unable to open the view for the image format that is not natively supported for iOS, you can use this tool to achieve your purpose. Features: * Support system native file system. * Support other apps Open image files in Kantu. * Support image file thumbnails. * Support for Quick Look. Supported image formats: * JPG * JPEG-2000 * TIFF * BMP * ICO * ICNS * GIF * PNG (APNG) * WebP * FLIF * AVIF * HEIC * SVG * BPG If you have any questions, or suggestions, you can use the feedback provided in the app to tell us.
Screenshots
Verdict
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).
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | USB Sharp | Kantu |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 3.1 (18 ratings) — better | 1.5 (2 ratings) |
| Positive reviews | 53.2% of reviews — better | 30.8% of reviews |
| Number of ratings | 18 — better | 2 |
| Update frequency | Every 3 weeks | Every 9 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 55 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | 锦文 游 | 俊锋 仝 |
Customer experience
USB Sharp
Kantu
In-app purchases
USB Sharp
- Remove ads$0.99
- Music Player$0.99
- Dropbox$0.99
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- Video Player$0.99
- SkyDrive$0.99
- Full Version$2.99
Kantu
No in-app purchases









