Comparison

Devour vs Offline PDF Viewer

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

Head to head
About

Devour

Features
Read full description

DEVOUR YOUR READING LIST Download free and start speed reading in seconds. Devour uses RSVP (Rapid Serial Visual Presentation) to display words one at a time right where your eyes are focusedβ€”so you read 2-3x faster without learning any special technique. Just import, tap play, and devour. HOW IT WORKS Traditional reading wastes time on eye movements. Devour eliminates that by presenting each word at a fixed point with the Optimal Recognition Point highlighted, so your brain processes text faster instantly. IMPORT ANYTHING EPUBs, PDFs, web articles, DOCX, TXT, Markdown, HTML, RTFβ€”if you can read it, Devour can speed-read it. Paste text or extract content from any URL. Your entire reading list in one app. POWERFUL FEATURES Speed Control β€” Adjust from 100 to 1,000+ words per minute. Start at your comfort zone and gradually increase as your brain adapts. Built-In Speed Test β€” Discover your baseline reading speed, then see how much faster you read with RSVP technology. Progress Tracking β€” Resume exactly where you left off. Every document saves your position automatically. Reading Statistics β€” Track total words read, reading time, average WPM, and daily streaks with beautiful visualizations. Daily Goals & Achievements β€” Set word count goals, build streaks, and earn milestones as your reading habit grows. Smart Library β€” Organize with favorites, reading status, and content type filters. Search and find anything instantly. iCloud Sync β€” Keep your library, reading progress, and statistics synchronized across all your Apple devices. Dark Mode β€” Automatic system theme matching or manual light/dark selection for comfortable reading anywhere. THE SCIENCE RSVP has been researched for decades as a method to increase reading speed. By presenting words at a fixed focal point with ORP highlighting, your visual system processes text more efficiently. Most readers see significant speed improvements from their very first session. PREMIUM Devour is free to use with ads. Go premium to remove all ads for an uninterrupted reading experience and support independent app development. START READING FASTER Import your first document and feel the difference. That article you bookmarked last week, the novel on your shelf, the PDF report for workβ€”Devour helps you get through it all. Faster. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Offline PDF Viewer

Features
Read full description

Offline PDF Viewer is an app for reading PDF files transferred to your iPad or iPhone. Its main feature is the ability to browse folders transferred through Finder or iTunes File Sharing while preserving their original folder hierarchy. This app may suit you if: - You have a large collection of scanned PDF files - You want to transfer PDFs to your iPad while keeping the same folder structure as on your Mac or PC - Your PDF collection is too large for cloud synchronization, and you prefer to manage it entirely on your device This app focuses on reading PDFs. It does not include editing, annotation, or some other features commonly found in general-purpose PDF viewers. Please review the following list of supported and unsupported features before using the app. β–  Features - Browse folders transferred through Finder or iTunes File Sharing while preserving their folder hierarchy - Adjust page-margin cropping and fine-tune rotation for each PDF - Switch to right-to-left page turning, primarily for Japanese books - View two pages side by side - See your approximate position in the PDF with a subtle β–² indicator β–  Not Supported - Cloud synchronization of PDF files - Moving or renaming files within the app - Writing to or editing PDF files - Bookmarks, highlights, annotations, or text selection - Page zooming

Screenshots

Devour4 screens
Offline PDF Viewer3 screens

Verdict

The call

The clearest difference is ads: Offline PDF Viewer at none against Devour's shown. Offline PDF Viewer also leads on update cadence (daily vs weekly). Devour's advantage is iOS requirement (13.4 vs 17.6). On price, in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Devour sells 2 in-app purchases, starting at $1.99 per month and Offline PDF Viewer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Devour ships an update weekly, Offline PDF Viewer daily. The most recent releases landed on October 16, 2026 and October 18, 2026 respectively.

Scorecard3 real differences Β· 3 level
Devour versus Offline PDF Viewer: the parameters behind the verdict, then further details
ParameterDevourOffline PDF Viewer
PriceFreeFree
Update frequencyWeeklyDaily β€” better
AdsYesNo β€” better
In-app purchasesYesYes
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.4 β€” better17.6
Further details β€” not scored
Size30 MB10 MB
Age rating4+4+
DeveloperBrett Cassidytakaaki024

In-app purchases

2 purchases

Devour

Subscriptions2
  • Monthly$1.991 Month
  • Yearly$14.991 Year
1 purchases

Offline PDF Viewer

One-time1
  • Support Developer$2.99

Questions

Is Devour free?
Devour is free to download, with in-app purchases available.
Is Offline PDF Viewer free?
Offline PDF Viewer is free to download, with in-app purchases available.
Do Devour or Offline PDF Viewer have ads?
Devour shows ads; Offline PDF Viewer does not.
Which is updated more often, Devour or Offline PDF Viewer?
Devour ships an update weekly, and Offline PDF Viewer daily. Most recently, Devour was updated on October 16, 2026 and Offline PDF Viewer on October 18, 2026.

Other comparisons