Comparison

USB Sharp vs Kantu

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Portable wireless storage
  • File management
  • Multiple file upload
  • Encrypted archive extraction
  • Document reader
  • Photo viewer
  • Video player
Features
Read full description

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

About

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.

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
Read full description

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

USB Sharp2 screens
Kantu4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard10 real differences · 0 level
USB Sharp versus Kantu: the parameters behind the verdict, then further details
ParameterUSB SharpKantu
PriceFree — better$1.99
Rating3.1 (18 ratings) — better1.5 (2 ratings)
Positive reviews53.2% of reviews — better30.8% of reviews
Number of ratings18 — better2
Update frequencyEvery 3 weeksEvery 9 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better26.0
Further details — not scored
Size55 MB17 MB
Age rating4+4+
Developer锦文 游俊锋 仝

Customer experience

USB Sharp

All ratings18 ratings
Positive44.4%
Neutral11.1%
Negative44.4%
Written reviews111 reviews
Positive53.2%
Neutral6.3%
Negative40.5%

Kantu

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews13 reviews
Positive30.8%
Neutral23.1%
Negative46.2%

In-app purchases

6 purchases

USB Sharp

One-time6
  • Remove ads$0.99
  • Music Player$0.99
  • Dropbox$0.99
Show 3 more
  • Video Player$0.99
  • SkyDrive$0.99
  • Full Version$2.99
None

Kantu

No in-app purchases

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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