Comparison

Audiobook Keeper vs Offline PDF Viewer

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

Head to head
About

Audiobook Keeper

Features
Read full description

Audiobook Keeper is a clean audiobook player for your books. Import audiobooks, organize them into folders, track listening progress, and pick up where you left off across iPhone and Apple Watch. Audiobook Keeper is built for personal libraries, long listening sessions, chaptered books, and offline playback. No noisy catalog. No silly social features. Just your audiobooks, organized and ready to play. Features: โ€ข Import your own audiobook files โ€ข Play MP3, M4B, and other supported audio files โ€ข Track listening progress automatically โ€ข Resume where you left off โ€ข Organize books into folders โ€ข Rename books for a cleaner library โ€ข Mark books as finished or restart progress โ€ข View chapter-aware playback when available โ€ข Control playback from the Lock Screen โ€ข Download audiobooks to Apple Watch with Audiobook Keeper Pro โ€ข Listen offline from your watch without carrying your phone Audiobook Keeper Pro unlocks Apple Watch downloads, so you can take audiobooks on runs, walks, workouts, commutes, and anywhere you want to listen without your iPhone. The iPhone audiobook library is free to use. Upgrade only when you want Apple Watch downloads. Audiobook Keeper is designed for audiobook listeners who want a focused, private, personal library that respects their files and remembers their place. Terms of Use (EULA): 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. โ–  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 โ–ฒ indicator โ–  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

Audiobook Keeper4 screens
Offline PDF Viewer3 screens

Verdict

The call

The clearest difference is iOS requirement: Offline PDF Viewer at 17.6 against Audiobook Keeper's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Audiobook Keeper sells 1 in-app purchase, starting at $4.99 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.

Scorecard1 real difference ยท 5 level
Audiobook Keeper versus Offline PDF Viewer: the parameters behind the verdict, then further details
ParameterAudiobook KeeperOffline PDF Viewer
PriceFreeFree
Update frequencyโ€”Daily
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, Apple Watch โ€” betteriPhone, iPad
Requires iOS26.017.6 โ€” better
Further details โ€” not scored
Size11 MB10 MB
Age rating4+4+
DeveloperZachary Frewtakaaki024

In-app purchases

1 purchases

Audiobook Keeper

Subscriptions1
  • Audiobook Pro$4.991 Month
1 purchases

Offline PDF Viewer

One-time1
  • Support Developer$2.99

Questions

Is Audiobook Keeper free?
Audiobook Keeper 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 Audiobook Keeper or Offline PDF Viewer have ads?
Neither Audiobook Keeper nor Offline PDF Viewer shows ads.

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