Comparison

USB Disk SE, File Manager vs Wrist PDF Viewer

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

Head to head
About

USB Disk SE, File Manager

This app allows you to store, view, and manage documents on your iPhone and iPad. It offers a built-in viewer, easy file transfers via iTunes, and integration with cloud storage services. Enjoy a simple interface with powerful features for organizing and accessing your files.

Highlights
  • Cloud storage integration (Dropbox, Google Drive, OneDrive, Box)
  • Store and view files on iPhone/iPod
  • Intuitive swipe navigation
  • File preview with thumbnails
  • Copy, paste, cut, delete, and create files
  • Email documents
  • USB file transfers
Features
Read full description

USB Disk lets you store, view and manage documents on your iPhone and iPad. It has an amazing built in document viewer and is very easy to use, with a simple and intuitive interface, yet it contains many powerful features. Drag and drop files in iTunes to transfer them to your iPhone / iPad, then view them anywhere! TUAW - "USB Disk is [...] a nicely designed one." Lifehacker - "The Best. USB Disk for iOS gives you a fast and easy way to transfer documents and images to your device." Apple - "New and Noteworthy" TOP REASONS TO BUY • Access Dropbox, Google Drive, OneDrive and Box. • Store and view files on your iPhone / iPod. • Navigate using swipes (like Photos / iBooks app). • Thumbnails let you preview your files. • Copy, paste, cut, delete and create files. MORE FEATURES • View and download email attachments. • Full screen file viewer. • USB file transfers. • Background audio. • Slideshow with adjustable delay. • Fast scrolling, page up/down functionalities. • Email your documents. SUPPORTED FILE TYPES • PDF files. • MS Office documents. • iWork documents. • Pictures (jpg, png, gif, ...). • eBooks (pdf, ePub, html, txt, ...). • Comics (cbr, cbz, pdf, ...). • Audio files (mp3, m4a, wav,...). • Video files (m4v, mov, avi, mkv, ...). UPDATES Buy now and get free updates. SUBSCRIPTION All features listed above can be used without an in app purchase. Some advanced features require an active subscription. These include: • Open and create zip files. • Adjust the audio mixer, use shuffle and repeat. • Access the device's photos library. • Protect the access to the app or specific files and folders with lock codes. • Access WebDAV and FTP servers. You can also configure SharePoint connections. • Edit simple text files. Also annotate PDF files. • Present files on external screens. Duration and price of each subscription are displayed in our storefront. All subscription costs will be charged to your Apple ID account, starting at the confirmation of purchase. Subscription automatically renews unless it is canceled at least 24 hours before the end of the subscription period. Your account will be charged for renewal within 24 hours prior to the end of the subscription period. It is not possible to cancel a subscription period once you have been charged for it. Any unused portion of a free trial period is forfeited as soon as a subscription is purchased. You can manage subscriptions and disable auto renewal by going to your account settings on the App Store after purchase. Terms of Service: https://imesart.com/legal/terms-of-service.php

About

Wrist PDF Viewer

View and manage PDF files directly on your Apple Watch and iPhone. Features include double-tap zooming, crown navigation, and search functionality. Sync documents seamlessly via iCloud with a premium subscription.

Highlights
  • View PDFs on Apple Watch
  • Sync PDFs via iCloud
  • Double-tap zooming
  • Digital Crown navigation
  • Search within PDFs
  • Large file support
Features
Read full description

Discover Wrist PDF Viewer — a simple and powerful way to view and manage PDF files directly on your wrist. Easily access your documents anytime with smooth performance and intuitive controls. Zoom in quickly with double-tap gestures or use the Digital Crown for precise navigation. Search for specific words instantly and handle large files without slowing down. Stay organized with seamless syncing between your phone and watch using cloud storage, so your files are always up to date and ready when you need them. Upgrade to Premium to unlock full features, including direct PDF viewing on your watch and seamless syncing across devices. Subscription options include monthly and yearly plans, both with a 7-day free trial. Payment begins after the trial ends and can be managed anytime in your account settings. Terms of Use: https://watchpdf.com/support/ Privacy Policy: https://watchpdf.com/privacy-policy/ Start your free trial today and enjoy a smarter way to carry your documents wherever you go.

Screenshots

USB Disk SE, File Manager4 screens
Wrist PDF Viewer3 screens

Verdict

The call

The clearest difference is monetization model: USB Disk SE, File Manager at free with in-app purchases against Wrist PDF Viewer's subscription. USB Disk SE, File Manager also leads on ratings volume (856 vs 6) and review sentiment (76% vs 63%). Wrist PDF Viewer's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 2 months). On price, rating, in-app purchases and device support there is nothing between them.

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

Both are free to download. USB Disk SE, File Manager sells 4 in-app purchases, starting at $1.99 per 7 days and Wrist PDF Viewer sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.4 for USB Disk SE, File Manager against 4.3 for Wrist PDF Viewer. That said, the two scores are not equally well evidenced: USB Disk SE, File Manager has 856 ratings behind it against 6, so its average is the more settled of the two. Written reviews are what separate them: 76% of USB Disk SE, File Manager's written reviews are positive against 63% of Wrist PDF Viewer's.

UpkeepUpdate frequency

USB Disk SE, File Manager ships an update every 2 months, Wrist PDF Viewer every 2 weeks. The most recent releases landed on November 5, 2026 and November 4, 2026 respectively.

Scorecard5 real differences · 5 level
USB Disk SE, File Manager versus Wrist PDF Viewer: the parameters behind the verdict, then further details
ParameterUSB Disk SE, File ManagerWrist PDF Viewer
PriceFreeFree
Rating4.4 (856 ratings) — better4.3 (6 ratings)
Positive reviews76.3% of reviews — better62.5% of reviews
Number of ratings856 — better6
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, iPad, Apple TV, Apple Watch — betteriPhone, iPod, Apple Watch
Requires iOS16.015.0 — better
Further details — not scored
Size224 MB7 MB
Age rating4+4+
DeveloperImesart S.a.r.l.Md Aswad Sarkar

Customer experience

USB Disk SE, File Manager

All ratings852 ratings
Positive85.0%
Neutral4.1%
Negative10.9%
Written reviews1,786 reviews
Positive76.3%
Neutral9.7%
Negative14.0%

Wrist PDF Viewer

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews8 reviews
Positive62.5%
Neutral0.0%
Negative37.5%

Bugs and requests

USB Disk SE, File Manager

Reported bugs

3 issues
  • Crashes when opening certain file types
  • Syncing issues with iTunes
  • Compatibility problems with newer iOS versions

Requested features

4 requests
  • Ability to edit documents within the app
  • Improved file management with folders and renaming
  • Support for more file types
  • Wireless file transfer without iTunes

Wrist PDF Viewer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

USB Disk SE, File Manager

Subscriptions4
  • USB Disk Pro Weekly$1.997 Days
  • USB Disk Pro Monthly7 Days trial$4.991 Month
  • USB Disk Pro Half Yearly14 Days trial$19.996 Months
Show 1 more
  • USB Disk Pro Yearly1 Month trial$39.991 Year
2 purchases

Wrist PDF Viewer

Subscriptions2
  • Wrist PDF Viewer Premium7 Days trial$2.991 Month
  • Wrist PDF Viewer Premium7 Days trial$17.991 Year

Questions

Is USB Disk SE, File Manager free?
USB Disk SE, File Manager is free to download, with in-app purchases available.
Is Wrist PDF Viewer free?
Wrist PDF Viewer is free to download, with in-app purchases available.
Which has better reviews, USB Disk SE, File Manager or Wrist PDF Viewer?
USB Disk SE, File Manager is rated higher. USB Disk SE, File Manager averages 4.4 out of 5 from 856 ratings, while Wrist PDF Viewer averages 4.3 from 6 ratings.
Do USB Disk SE, File Manager or Wrist PDF Viewer have ads?
USB Disk SE, File Manager shows ads; Wrist PDF Viewer does not.
Which is updated more often, USB Disk SE, File Manager or Wrist PDF Viewer?
USB Disk SE, File Manager ships an update every 2 months, and Wrist PDF Viewer every 2 weeks. Most recently, USB Disk SE, File Manager was updated on November 5, 2026 and Wrist PDF Viewer on November 4, 2026.

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