Comparison

USB Disk vs GEOCALC SIRGAS

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

GEOCALC SIRGAS

This app converts geographic references to various coordinate systems, including Elipsoidal, Gauss-Krüger, Geocentric, and Plane Cartesian, specifically for the Colombian system. It's a specialized tool for surveying and geodesy professionals.

Highlights
  • Geographic reference conversion
  • Elipsoidal coordinates
  • Gauss-Krüger coordinates
  • Geocentric coordinates
  • Plane Cartesian coordinates
  • Colombian system support
Features
Read full description

La calculadora favorita para topografía y geodesia. Convierte referencias geográficas a Elipsoidal, Gauss-krüger, Geocéntrica y Plana cartesiana dentro del sistema colombiano.

Screenshots

USB Disk4 screens
GEOCALC SIRGAS4 screens

Verdict

The call

The clearest difference is rating: USB Disk at 4.6 against GEOCALC SIRGAS's 4.0. USB Disk also leads on update cadence (every 2 months vs every 27 months) and ratings volume (161 vs 1). GEOCALC SIRGAS's advantage is in-app purchases (none vs 10) and ads (none vs shown). On price 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 GEOCALC SIRGAS $0.99 up front. USB Disk sells 10 in-app purchases, starting at $4.99 per month. GEOCALC SIRGAS asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

USB Disk holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: USB Disk has 161 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 71% of USB Disk's written reviews are positive against 100% of GEOCALC SIRGAS's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

USB Disk ships an update every 2 months, GEOCALC SIRGAS every 27 months. The most recent releases landed on October 29, 2026 and October 7, 2026 respectively.

Scorecard8 real differences · 2 level
USB Disk versus GEOCALC SIRGAS: the parameters behind the verdict, then further details
ParameterUSB DiskGEOCALC SIRGAS
Price$0.99$0.99
Rating4.6 (161 ratings) — better4.0 (1 ratings)
Positive reviews70.9% of reviews100.0% of reviews — better
Number of ratings161 — better1
Update frequencyEvery 2 months — betterEvery 27 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS16.010.0 — better
Further details — not scored
Size200 MB19 MB
Age rating4+4+
DeveloperImesart S.a.r.l.Rodolfo Torres

Customer experience

USB Disk

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

GEOCALC SIRGAS

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

GEOCALC SIRGAS

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
None

GEOCALC SIRGAS

No in-app purchases

Questions

Is USB Disk free?
USB Disk costs $0.99, and also offers in-app purchases.
Is GEOCALC SIRGAS free?
GEOCALC SIRGAS costs $0.99, with no in-app purchases.
Which has better reviews, USB Disk or GEOCALC SIRGAS?
USB Disk is rated higher. USB Disk averages 4.6 out of 5 from 161 ratings, while GEOCALC SIRGAS averages 4.0 from 1 ratings.
Do USB Disk or GEOCALC SIRGAS have ads?
USB Disk shows ads; GEOCALC SIRGAS does not.
Which is updated more often, USB Disk or GEOCALC SIRGAS?
USB Disk ships an update every 2 months, and GEOCALC SIRGAS every 27 months. Most recently, USB Disk was updated on October 29, 2026 and GEOCALC SIRGAS on October 7, 2026.

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