Comparison

USB Disk Pro vs PDF Maker

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

Head to head
About

USB Disk Pro

Manage and view documents on your iPhone and iPad with this powerful file manager. It offers a built-in viewer, easy file transfers via iTunes or Wi-Fi, and supports numerous cloud services. Secure your files with encryption and access them from various locations.

Highlights
  • Store and view files
  • Built-in document viewer
  • iTunes and Wi-Fi file transfers
  • Cloud service integration
  • File encryption and protection
  • Supports Files app
Features
Read full description

USB Disk Pro 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 • Store and view files. • Open multiple documents in different pages. • Restores last viewing position. • Navigate using swipes (like Photos / iBooks app). • Thumbnails let you preview your files. • Protect & encrypt files using Apple's Data Protection. • Supports the Files application (file provider for iOS 11+). MORE FEATURES • View and download email attachments. • Full screen file viewer. • Copy, paste, cut, delete and create files. • USB file transfers. • File transfers without iTunes over WiFi. • TV / VGA out. • Slideshow with adjustable delay. • Fast scrolling, page up/down functionalities. • Email your documents. • Lock code. • Download web files. • In app web browser. • Storage provider for other apps. • Background audio. BROWSING LOCATIONS • Local files. • Dropbox. • Google Drive. • OneDrive, SharePoint. • Box. • Evernote. • WebDAV and WWW servers. • FTP, SFTP servers. • Device's Photo Library. READING 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, ...). EDITING FILE TYPES • ZIP files. • Small txt files. • PDF annotations. UPDATES Buy now and get free updates.

About

PDF Maker

Transform your device into a portable document studio. Convert images to PDF, scan documents, merge files, and compress PDFs in seconds. This app offers a suite of tools for managing and editing documents on the go, with a focus on privacy and an intuitive interface.

Highlights
  • Convert images to PDF
  • Document scanner with edge detection
  • Merge multiple PDF files
  • Compress and reduce PDF size
  • Flatten interactive PDF elements
  • Rotate pages
  • View and edit PDF pages
Features
Read full description

PDF Maker transforms your iPhone into a portable document studio. Whether you need to convert photos to PDF, merge contracts, compress large files, or scan receipts on the go - everything happens in seconds, right in your pocket. CONVERT PHOTOS TO PDF Turn any image into a professional PDF document. Select photos from your library, snap pictures with your camera, or import files. Adjust quality settings from draft to maximum resolution. Choose page formats including A4, Letter, Legal, or let the app fit pages to your images automatically. Perfect for digitizing old photographs, creating photo albums, or preparing image-based reports. DOCUMENT SCANNER Your phone camera becomes a powerful scanner. Capture documents, receipts, whiteboards, and handwritten notes with automatic edge detection. The built-in scanner recognizes document boundaries and optimizes contrast for crystal-clear results. No more hunting for a scanner - handle paperwork anywhere, anytime. MERGE MULTIPLE PDFs Combine separate PDF files into one organized document. Drag to reorder pages exactly how you want them. Great for assembling project documentation, combining invoices for expense reports, or creating comprehensive portfolios from multiple sources. COMPRESS & REDUCE SIZE Large PDF files slow everything down - email attachments bounce back, cloud storage fills up, sharing becomes frustrating. Our compression engine shrinks file sizes significantly while preserving readable quality. Send documents faster and save storage space without sacrificing clarity. FLATTEN PDF DOCUMENTS Working with forms that have fillable fields? Need to lock down annotations and comments? Flatten converts interactive elements into static content. This prevents further editing and ensures your document looks identical on every device and printer. ROTATE PAGES Fix upside-down scans or sideways photos instantly. Rotate individual pages or entire documents in 90-degree increments. Preview changes before saving. Simple controls make orientation corrections effortless. VIEW & EDIT Browse your PDFs with smooth scrolling and sharp rendering. Select specific pages to rotate, delete, or extract into new documents. Thumbnail view helps you navigate long files quickly. Edit tools give you control over document structure without needing desktop software. INTUITIVE DESIGN Dark interface reduces eye strain during extended use. Clean layout puts every tool within easy reach. Haptic feedback confirms your actions. The app responds quickly — no waiting around for operations to complete. PRIVACY FIRST Your documents stay on your device. No files get uploaded to external servers for processing. What you create remains yours alone. Built for everyone who handles documents regularly: students assembling research papers, professionals preparing client materials, small business owners organizing records, and families preserving memories. PDF Maker brings desktop-level PDF tools to your phone - lightweight, fast, and always available. Subscription Terms: Payment charged to iTunes Account. Auto-renews unless disabled 24 hours before period ends. Manage in Account Settings. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Download now and discover how simple PDF work can be.

Screenshots

USB Disk Pro4 screens
PDF Maker4 screens

Verdict

The call

The clearest difference is price: PDF Maker at Free against USB Disk Pro's $99.99. PDF Maker also leads on rating (5.0 vs 4.5) and review sentiment (100% vs 66%). USB Disk Pro's advantage is in-app purchases (none vs 3) and ratings volume (142 vs 1). On update cadence, ads, device support and iOS requirement 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

PDF Maker is free to download; USB Disk Pro costs $99.99 up front. PDF Maker sells 3 in-app purchases, starting at $2.99 per month. USB Disk Pro asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

PDF Maker holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: USB Disk Pro has 142 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 66% of USB Disk Pro's written reviews are positive against 100% of PDF Maker's.

UpkeepUpdate frequency

USB Disk Pro ships an update every 3 months, PDF Maker every 2 months. The most recent releases landed on October 14, 2026 and October 2, 2026 respectively.

Scorecard6 real differences · 4 level
USB Disk Pro versus PDF Maker: the parameters behind the verdict, then further details
ParameterUSB Disk ProPDF Maker
Price$99.99Free — better
Rating4.5 (142 ratings)5.0 (1 ratings) — better
Positive reviews65.6% of reviews100.0% of reviews — better
Number of ratings142 — better1
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, Apple TV, Apple Watch — betteriPhone, iPad, Mac
Requires iOS16.016.0
Further details — not scored
Size215 MB5 MB
Age rating17+4+
DeveloperImesart S.a.r.l.Igor Bidenko

Customer experience

USB Disk Pro

All ratings142 ratings
Positive89.4%
Neutral4.2%
Negative6.3%
Written reviews607 reviews
Positive65.6%
Neutral11.9%
Negative22.6%

PDF Maker

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

USB Disk Pro

Reported bugs

3 issues
  • App closing unexpectedly when using certain features
  • Inability to open large files without crashing
  • Inconsistent file handling and naming

Requested features

4 requests
  • Advanced video player controls (fast forward, slow motion, zoom)
  • Basic image editing tools
  • Improved file/folder organization and naming
  • Integration with more cloud storage services

PDF Maker

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

USB Disk Pro

No in-app purchases

3 purchases

PDF Maker

Subscriptions2
  • PDF Maker$2.991 Month
  • PDF Maker3 Days trial$9.991 Year
One-time1
  • PDF Maker$14.99

Questions

Is USB Disk Pro free?
USB Disk Pro costs $99.99, with no in-app purchases.
Is PDF Maker free?
PDF Maker is free to download, with in-app purchases available.
Which has better reviews, USB Disk Pro or PDF Maker?
PDF Maker is rated higher. USB Disk Pro averages 4.5 out of 5 from 142 ratings, while PDF Maker averages 5.0 from 1 ratings.
Do USB Disk Pro or PDF Maker have ads?
Neither USB Disk Pro nor PDF Maker shows ads.
Which is updated more often, USB Disk Pro or PDF Maker?
USB Disk Pro ships an update every 3 months, and PDF Maker every 2 months. Most recently, USB Disk Pro was updated on October 14, 2026 and PDF Maker on October 2, 2026.

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