Comparison

USB Disk vs Sketch Simply

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

Head to head
About

USB Disk

Manage and view documents on your iPhone or iPad with this intuitive file manager. Access cloud storage, open various file types, and transfer files via iTunes. Advanced features like photo library access and PDF annotation are available via subscription.

Highlights
  • Cloud storage integration (Dropbox, Google Drive, OneDrive, Box)
  • Built-in document viewer for various file types
  • File transfer via iTunes
  • Create and open zip files
  • Swipe navigation and file previews
  • Email documents and download attachments
Features
Read full description

USB Disk lets you store, view and manage documents on your iPhone or 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 or 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. • Open and create zip files. • Store and view files. • 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. • Restores last viewing position. • Full screen file viewer. • CBR and CBZ file viewer. • USB file transfers. • Background audio. • Slideshow with adjustable delay. • Fast scrolling, page up/down functionalities. • Email your documents. • Lock code. SUPPORTED FILE TYPES • PDF files. • Compressed files (zip, rar). • 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: • 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

Sketch Simply

This app serves as a digital sketchbook for brainstorming, rough designs, and idea recording. It offers Apple Pencil support to prevent accidental touch drawings and automatically backs up and synchronizes sketches across devices via iCloud. Archived books can be shared as PDFs or used for collaboration.

Highlights
  • Digital sketchbook for ideas and designs
  • Apple Pencil support for precise drawing
  • Automatic iCloud backup and synchronization
  • Share sketches as images or PDF archives
  • Collaborative whiteboard feature via AirPlay
  • Draw in color with an in-app purchase
Features
Read full description

Use SkBk for brainstorming, rough design sketches and making a record of your ideas. Indicate if you're using an Apple Pencil in order to avoid inadvertent hand, wrist, knuckle and finger touch drawings. With an iCloud account, your sketches and archives will be backed up automatically. You'll never lose your sketches. Archived books can be shared to other PDF reading apps. What's more, with an iCloud enabled account, your sketches and archives will be synchronized across all your iCloud enabled devices. Use Air Play on your iPad or iPhone to an Apple TV and use it as a white board for collaboration. Then share the images or pages with the collaborators and others. Features: Draw on a single page in portrait, or on two pages at once in landscape orientation. Undo prior strokes. Defaults automatically to use iCloud to back up and synchronize your sketch book across devices. This preference can be turned off in the Settings app. Indicate the use of the Apple Pencil for improved drawing, eliminating unintended strokes between hand touches and the Apple Pencil touches. Share your drawings as images, your pages¹ with other SkBk users, and your archives¹ with other people or PDF capable apps. Draw in color¹. Menu of options: - Share an image. - Share a page. - Enable Undo. - Draw in color.¹ - Archive a book of sketches as a PDF document. Books can have up to 122 pages. - View and manage book archives. Books can be individually shared¹ and removed from the archives. Footnotes: 1) Selecting color drawing requires a one time in app purchase.

Screenshots

USB Disk4 screens
Sketch Simply4 screens

Verdict

The call

The clearest difference is rating: USB Disk at 4.6 against Sketch Simply's 3.6. USB Disk also leads on review sentiment (71% vs 50%) and ratings volume (161 vs 5). Sketch Simply's advantage is ads (none vs shown) and update cadence (every 11 days vs every 2 months). On price, in-app purchases, monetization model 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

USB Disk costs $0.99 and Sketch Simply $0.99 up front. USB Disk sells 10 in-app purchases, starting at $4.99 per month and Sketch Simply sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

USB Disk holds the better App Store score, 4.6 against 3.6. That said, the two scores are not equally well evidenced: USB Disk has 161 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 71% of USB Disk's written reviews are positive against 50% of Sketch Simply's.

UpkeepUpdate frequency

USB Disk ships an update every 2 months, Sketch Simply every 11 days. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard6 real differences · 4 level
USB Disk versus Sketch Simply: the parameters behind the verdict, then further details
ParameterUSB DiskSketch Simply
Price$0.99$0.99
Rating4.6 (161 ratings) — better3.6 (5 ratings)
Positive reviews70.9% of reviews — better50.0% of reviews
Number of ratings161 — better5
Update frequencyEvery 2 monthsEvery 11 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS16.014.0 — better
Further details — not scored
Size200 MB1 MB
Age rating4+4+
DeveloperImesart S.a.r.l.Montiel Mobile, LLC

Customer experience

USB Disk

All ratings161 ratings
Positive90.7%
Neutral3.1%
Negative6.2%
Written reviews1,057 reviews
Positive70.9%
Neutral13.9%
Negative15.2%

Sketch Simply

All ratings5 ratings
Positive60.0%
Neutral0.0%
Negative40.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Bugs and requests

USB Disk

Reported bugs

3 issues
  • Inability to open certain file types
  • Compatibility issues with newer iOS versions
  • Syncing problems between devices

Requested features

4 requests
  • Support for more file types
  • Improved integration with cloud storage services
  • Ability to edit and annotate files
  • Better organization and folder management

Sketch Simply

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

USB Disk

Subscriptions1
  • USB Disk Pro Monthly7 Days trial$4.991 Month
One-time9
  • Audio Player +$0.99
  • Zip files support$0.99
  • Dropbox access$0.99
Show 6 more
  • Lock code$0.99
  • Text editor$0.99
  • Evernote access$0.99
  • Google Drive access$0.99
  • OneDrive access$0.99
  • WebDAV access$1.99
1 purchases

Sketch Simply

One-time1
  • Draw in Color$2.99

Questions

Is USB Disk free?
USB Disk costs $0.99, and also offers in-app purchases.
Is Sketch Simply free?
Sketch Simply costs $0.99, and also offers in-app purchases.
Which has better reviews, USB Disk or Sketch Simply?
USB Disk is rated higher. USB Disk averages 4.6 out of 5 from 161 ratings, while Sketch Simply averages 3.6 from 5 ratings.
Do USB Disk or Sketch Simply have ads?
USB Disk shows ads; Sketch Simply does not.
Which is updated more often, USB Disk or Sketch Simply?
USB Disk ships an update every 2 months, and Sketch Simply every 11 days. Most recently, USB Disk was updated on November 1, 2026 and Sketch Simply on November 2, 2026.

Other comparisons