Comparison

Grim Reader vs ABS Admin

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

Head to head
About

Grim Reader

Organize and enrich your personal library of e-books, comics, and audiobooks. This app allows you to manage your collection locally or via your own servers, adding details like covers and author information. Enjoy a seamless reading and listening experience across all your content.

Highlights
  • Library management for e-books, comics, and audiobooks
  • Enrich library with online book and author data
  • Supports local files and personal servers (WebDAV, OPDS)
  • Cross-device reading and listening progress tracking
  • Organize by author, series, and genre
  • Mark favorites
Features
Read full description

Your books. Your library. Your way. Privacy By Design. Made in the EU. Grim Reader is a modern reader and library manager for e-books, comics and audiobooks. Keep your collection on your device, connect to your own servers, and turn even a simple collection of files into a rich, beautifully organised library. A library that feels alive Browse your collection by books, authors, series and more. See covers, reading progress and detailed information at a glance, continue where you left off, mark favourites and quickly find what you want to read next. Grim Reader is designed for both iPhone and iPad, with an interface that adapts to the device you are using. Enrich your books Missing a cover, description or other information? Grim Reader can help enrich your library using online book and author sources. Depending on the available information, Grim Reader can help you find and add details such as: • Covers and book descriptions • Authors and author information • Series information • Publisher and publication details • ISBN and other identifiers • Genres, categories and tags • Additional book metadata You remain in control and can review and edit your library information. More than e-books Grim Reader brings different types of reading together in one library: • Read e-books • Browse and read comics • Listen to audiobooks • Keep track of reading progress • Continue reading or listening across your library • Organise books by author and series • Mark books and authors as favourites Your files, your servers You don’t need to hand your library over to a commercial book platform. Grim Reader can work with books stored locally and supports personal libraries through WebDAV and OPDS, as well as the optional Grimmory server. This makes Grim Reader equally useful for a small collection on your iPhone or iPad and for a large self-hosted library. Made for readers Grim Reader focuses on your books rather than a store. There are no books to sell you and no ecosystem you need to buy into. Build the library you want, enrich it, organise it and enjoy reading it. Grim Reader — your library belongs to you.

About

ABS Admin

Manage your personal audiobook and ebook server, play and read content, and organize your entire library. This app offers a comprehensive suite of tools for server administration, including metadata editing, library cleanup, and user management.

Highlights
  • Manage audiobook and ebook libraries
  • Built-in audiobook player
  • EPUB, PDF, and CBZ reader
  • Edit metadata and fix covers
  • Organize series, collections, and playlists
  • Upload media from cloud storage
  • Podcast management
  • User and permission management
Features
Read full description

ABS Admin is the app your Audiobookshelf server was missing. Manage your whole library, read your ebooks, and press play, all from your phone. Try it right now with no server: tap "Explore a Demo" and the entire app works with sample data. LISTEN & READ - A clean home that opens on your books, not on menus - Search every library and tap to play or read - Continue Listening and Continue Reading pick up exactly where you left off - Browse any library as a wall of covers - Built-in player: play, skip, chapters, speed, bookmarks, lock screen, background audio, progress synced to your server - Built-in reader for EPUB, PDF, and comics (CBZ): themes, fonts, size and spacing, search, bookmarks, and a Dyslexia mode with wider spacing and ragged edges for easier reading - Want downloads, CarPlay, Apple Watch, or a sleep timer? A quiet link hands the book to Lull, our full audiobook player MANAGE YOUR SERVER - Edit metadata: title, author, narrator, series, genres, tags, description - Quick match and fix missing covers, one book or the whole library - Clean Up: rename or delete a genre, tag, or narrator across every book at once, and split messy imported labels like "Paranormal, Contemporary, Urban" into separate genres in one tap - Series, collections, and playlists - Move a book between libraries, something even the web app cannot do - Upload audiobooks and ebooks from iCloud Drive, Dropbox, Google Drive, or anywhere the Files app reaches - Podcasts: add shows by search or feed, import OPML, download old episodes, clean up the back catalog - Users: create, edit, set passwords, roles, permissions, and per library access - Backups: create, download, restore, and schedule - Send an ebook straight to your Kindle - Listening dashboard: who is listening now, full session history, daily hours, top listeners, and a Year in Review - Create and configure libraries, run scans, open RSS feeds, and set up notifications SAFE BY DESIGN - Destructive actions are guarded: file deletion is off by default and asks you to type to confirm - Moving a book copies it first and removes the original only after the copy succeeds PRIVATE BY DESIGN - Talks only to your own server with your own account - No analytics, no tracking, no data collected ABS Admin is an independent companion app and is not affiliated with the Audiobookshelf project. It needs your own Audiobookshelf server, or use the demo to look around.

Screenshots

Grim Reader3 screens
ABS Admin4 screens

Verdict

The call

The clearest difference is in-app purchases: Grim Reader at none against ABS Admin's 3. Grim Reader also leads on ratings volume (4 vs 1). ABS Admin's advantage is update cadence (every 5 days vs every 2 weeks). On price, rating, ads and monetization model 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

Both are free to download. ABS Admin sells 3 one-off in-app purchases. Grim Reader asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Grim Reader against 5.0 for ABS Admin. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

UpkeepUpdate frequency

Grim Reader ships an update every 2 weeks, ABS Admin every 5 days. Both last shipped on October 10, 2026.

Scorecard3 real differences · 6 level
Grim Reader versus ABS Admin: the parameters behind the verdict, then further details
ParameterGrim ReaderABS Admin
PriceFreeFree
Rating5.0 (4 ratings)5.0 (1 ratings)
Number of ratings4 — better1
Update frequencyEvery 2 weeksEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size16 MB8 MB
Age rating4+4+
DeveloperMaarten de KreijCorey FELDMAN

Customer experience

Grim Reader

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

ABS Admin

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Grim Reader

No in-app purchases

3 purchases

ABS Admin

One-time3
  • Small Tip$0.99
  • Medium Tip$2.99
  • Large Tip$4.99

Questions

Is Grim Reader free?
Grim Reader is free to download, with no in-app purchases.
Is ABS Admin free?
ABS Admin is free to download, with in-app purchases available.
Which has better reviews, Grim Reader or ABS Admin?
Grim Reader and ABS Admin are both rated 5.0 out of 5 on the App Store, from 4 and 1 ratings respectively.
Do Grim Reader or ABS Admin have ads?
Neither Grim Reader nor ABS Admin shows ads.
Which is updated more often, Grim Reader or ABS Admin?
Grim Reader ships an update every 2 weeks, and ABS Admin every 5 days. Most recently, Grim Reader was updated on October 10, 2026 and ABS Admin on October 10, 2026.

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