Comic Book Viewer vs Reader King
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Comic Book Viewer
A fast and user-friendly application for viewing digital comic books and PDF files. It supports various comic archive formats and common image types, offering library management and metadata display.
- Supports CBT, CBZ, CBR, CB7, and PDF formats
- Recognizes PNG, JPG, GIF, TIFF, BMP, and WebP images
- Import/export comics via iTunes or third-party apps
- AirDrop support for sharing between devices
- Displays metadata (CoMet, ACBF, Comic Rack, ComicBookInfo)
- Library search functionality
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Comic Book Viewer is a lightweight, fast and easy to use reader for your favorite comic books in cbt, cbz, cbr, cb7 or pdf format. Recognized image formats include png, jpg, gif, tiff, bmp and webp. Import and export your comics via iTunes or simply by sharing them in any third-party app on your device. Send them to other devices via AirDrop. Comic Book Viewer supports and shows metadata in CoMet, Advanced Comic Book Format, Comic Rack or in ComicBookInfo format and allows you to search your library. Comics seen in screenshots © 2014-2025 by Ctrl+Alt+Del Productions. Courtesy of Tim Buckley, http://www.cad-comic.com. Comics not included.
Reader King
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Reader King is a local-first eBook reader for organizing, importing and reading personal files on iPhone, iPad and Mac. It does not require registration, sign-in or a cloud account. Your books, reading progress, bookmarks and reading history stay in the app sandbox on your device. You can import common document and eBook files from Files, Finder or system sharing, including PDF, EPUB, TXT, Markdown, RTF, MOBI, AZW, AZW3, CBZ, FB2 and HTML. Reader King copies imported files into its local sandbox so access does not depend on temporary external file permissions. The built-in reader focuses on PDF reading in this release, with automatic page progress, search, outline, bookmarks, page jump, single-page and double-page layouts, and reader preferences. Other supported eBook formats can be imported, archived, downloaded and managed locally. Reader King also supports network subscriptions. Add a direct eBook download link, or provide a JSON, CSV or plain text manifest to parse and download multiple books into your shelf. Downloads only happen from links you enter. Highlights: - Local import from iPhone, iPad and Mac. - PDF reading with progress, search, outline, bookmarks and page jump. - Direct link downloads and batch manifest subscriptions. - Responsive shelf layouts for phone, tablet and desktop. - Mac support for Finder import, drag and drop, menu shortcuts and Settings. - No account, no third-party analytics and no uploaded reading records.
Screenshots
Verdict
The clearest difference is in-app purchases: Comic Book Viewer at none against Reader King's 1. Comic Book Viewer also leads on iOS requirement (15.6 vs 18.6). Reader King's advantage is update cadence (every 4 weeks vs every 3 months). On price, ads 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
Both are free to download. Reader King sells 1 one-off in-app purchase. Comic Book Viewer asks for nothing beyond the download.
Comic Book Viewer ships an update every 3 months, Reader King every 4 weeks. The most recent releases landed on October 13, 2026 and September 29, 2026 respectively.
| Parameter | Comic Book Viewer | Reader King |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (135 ratings) — better | — |
| Positive reviews | 71.0% of reviews | — |
| Number of ratings | 135 — better | — |
| Update frequency | Every 3 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.6 — better | 18.6 |
| Further details — not scored | ||
| Size | 8 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Sebastian Boettcher | lecoo |
Bugs and requests
Comic Book Viewer
Reported bugs
3 issues- Slider not working after recent update
- Pages randomly skipping ahead when switching orientation
- Inability to import some comic file formats
Requested features
4 requests- Add ability to rename/reorder comics
- Implement vertical scrolling mode
- Provide more customization settings
- Improve library management with folders/collections
Reader King
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Comic Book Viewer
No in-app purchases
Reader King
- Reader King Enhanced$0.99
Questions
Is Comic Book Viewer free?
Is Reader King free?
Do Comic Book Viewer or Reader King have ads?
Which is updated more often, Comic Book Viewer or Reader King?
Other comparisons
