Comparison

Thorium Reader vs Libra reader

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

Head to head
About

Thorium Reader

Organize all your ebooks, comics, and manga in a single app. Customize your reading experience with adjustable text, fonts, and themes. Listen to audiobooks and zoom into visual content with ease.

Highlights
  • Unified bookshelf for all content
  • Adjustable text size and spacing
  • Multiple font options
  • Text-to-speech audio playback
  • Zoom for comics and manga
  • Offline dictionary and translation
  • Import EPUB, PDF, CBZ files
Features
Read full description

Looking for an app where you can bring all your ebooks, comics and manga in one place? That’s what we built Thorium Reader for. Read it your way Everyone’s different, that’s why we want you to be fully in control: • Adjust text size, switch between color schemes with themes and control spacing. • 10+ fonts available, including specialized ones. • You prefer audio? Listen to any ebook, whenever you want. We’ll remember your preference. • Zoom into comics, manga and magazines. • Add bookmarks with notes. • Use the built-in iOS dictionary and translation features, even offline. • Tweak your reading experience with reading options. Bring your own books A single bookshelf and reading application where you can bring all your content: • Download free books, borrow from your library or buy from your favorite retailer. • Support for ebooks, documents, comics and manga. • Import EPUB, PDF and CBZ files. • Support for Readium LCP, used by thousands of libraries and retailers. Thorium Reader is built by EDRLab, a non-profit dedicated to open standards, reading and accessibility.

About

Libra reader

Features
Read full description

Libra is a modern ebook reader and library manager for iPhone and iPad. Read the books you already own — from your device, your cloud storage, or any OPDS catalog — and keep your reading progress, highlights and notes in sync across all your devices. Key features • All major ebook formats • Read from device, cloud storage and OPDS catalogs • Comfortable, fully customizable reading • Highlights, notes and bookmarks • On-device translation • Reading sync across your devices Ebook formats • EPUB • PDF • FictionBook (fb2, fb2.zip) • MobiPocket and Kindle (mobi, azw3) • Comic Book (cbz) • Word (docx) • Markdown, HTML and plain text (md, html, txt) Your books, your storage • Locally on the device • In cloud storage: iCloud Drive, Google Drive, OneDrive, Dropbox, Yandex Disk • From OPDS catalogs and online libraries you choose • Add your own catalog, for example a Calibre content server over OPDS Comfortable reading • Light, Sepia and Dark themes • Paginated (swipe) or continuous scroll • Serif, sans-serif and monospace fonts • Adjustable font size, line height, paragraph spacing, margins, letter spacing and text alignment • Device-independent reading position that transfers correctly across screens and devices • Table of contents navigation Highlights, notes and bookmarks • Highlight passages in four colors • Attach notes to your highlights • Bookmark any page • Share and export your notes and highlights as text Library management • Organize books into custom collections • Browse by folders across all your sources • Search your library • Automatic cover and metadata extraction • Track reading status and progress, and mark books finished • Rate and review your books • Back up and restore your library Translation • Translate selected text right in the reader • Translation runs on your device — nothing leaves it Sync across your devices (Pro) • Sync your library, reading position, progress, highlights, notes, bookmarks, reviews and collections • Syncs privately through your own iCloud account — we run no server and never hold your data ——— Support: support@libra-reader.com Privacy Policy: https://libra-reader.com/privacy Terms of Service: https://libra-reader.com/terms

Screenshots

Thorium Reader4 screens
Libra reader4 screens

Verdict

The call

The clearest difference is review sentiment: Libra reader at 100% against Thorium Reader's 40%. Libra reader also leads on rating (4.0 vs 3.5) and iOS requirement (18.2 vs 26.1). Thorium Reader's advantage is in-app purchases (none vs 2) and ratings volume (13 vs 1). On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Libra reader sells 2 in-app purchases, starting at $1.99 per month. Thorium Reader asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Libra reader holds the better App Store score, 4.0 against 3.5. That said, the two scores are not equally well evidenced: Thorium Reader has 13 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 40% of Thorium Reader's written reviews are positive against 100% of Libra reader's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
Thorium Reader versus Libra reader: the parameters behind the verdict, then further details
ParameterThorium ReaderLibra reader
PriceFreeFree
Rating3.5 (13 ratings)4.0 (1 ratings) — better
Positive reviews40.0% of reviews100.0% of reviews — better
Number of ratings13 — better1
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.118.2 — better
Further details — not scored
Size46 MB73 MB
Age rating17+4+
DeveloperReadiumSergei Mikhailov

Customer experience

Thorium Reader

All ratings12 ratings
Positive58.3%
Neutral8.3%
Negative33.3%
Written reviews10 reviews
Positive40.0%
Neutral10.0%
Negative50.0%

Libra reader

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Thorium Reader

No in-app purchases

2 purchases

Libra reader

Subscriptions2
  • Libra Pro – Monthly$1.991 Month
  • Libra Pro – Yearly$19.991 Year

Questions

Is Thorium Reader free?
Thorium Reader is free to download, with no in-app purchases.
Is Libra reader free?
Libra reader is free to download, with in-app purchases available.
Which has better reviews, Thorium Reader or Libra reader?
Libra reader is rated higher. Thorium Reader averages 3.5 out of 5 from 13 ratings, while Libra reader averages 4.0 from 1 ratings.
Do Thorium Reader or Libra reader have ads?
Neither Thorium Reader nor Libra reader shows ads.
Which is updated more often, Thorium Reader or Libra reader?
Thorium Reader ships an update every 3 weeks, and Libra reader every 3 weeks. Most recently, Thorium Reader was updated on October 25, 2026 and Libra reader on October 24, 2026.

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