Comparison

Libraryai vs Reader King

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

Head to head
About

Libraryai

Features
Read 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

About

Reader King

Features
Read 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

Libraryai4 screens
Reader King4 screens

Verdict

The call

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Reader King sells 1 one-off in-app purchase. Libraryai asks for nothing beyond the download.

UpkeepUpdate frequency

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.

Scorecard2 real differences ยท 4 level
Libraryai versus Reader King: the parameters behind the verdict, then further details
ParameterLibraryaiReader King
PriceFreeFree
Update frequencyEvery 2 monthsEvery 4 weeks โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.1 โ€” better18.6
Further details โ€” not scored
Size28 MB6 MB
Age rating4+4+
DeveloperDaniil Sukhovlecoo

In-app purchases

None

Libraryai

No in-app purchases

1 purchases

Reader King

One-time1
  • Reader King Enhanced$0.99

Questions

Is Libraryai free?
Libraryai is free to download, with no in-app purchases.
Is Reader King free?
Reader King is free to download, with in-app purchases available.
Do Libraryai or Reader King have ads?
Neither Libraryai nor Reader King shows ads.
Which is updated more often, Libraryai or Reader King?
Libraryai ships an update every 2 months, and Reader King every 4 weeks. Most recently, Libraryai was updated on October 25, 2026 and Reader King on October 28, 2026.

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