Libraryai vs Reader King
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Libraryai
Read full descriptionHide full description
LibraryAI is your smart online reading companion. Build your personal digital library, get AI book recommendations based on your taste, join pair reading challenges with friends, track your reading streak, save notes for every book, and discover new stories together. Make reading social, and motivating in one app
Reader King
Read full descriptionHide full description
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: Libraryai at none against Reader King's 1. Libraryai also leads on iOS requirement (15.1 vs 18.6). On price, update cadence, ads 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
Both are free to download. Reader King sells 1 one-off in-app purchase. Libraryai asks for nothing beyond the download.
Libraryai ships an update every 2 months, Reader King every 4 weeks. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.
| Parameter | Libraryai | Reader King |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 4 weeks โ better |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.1 โ better | 18.6 |
| Further details โ not scored | ||
| Size | 28 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Daniil Sukhov | lecoo |
In-app purchases
Libraryai
No in-app purchases
Reader King
- Reader King Enhanced$0.99









