Readest vs Lios Calibre Viewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Readest
This app is a powerful ebook reader designed for deep thinkers and researchers. It offers advanced annotation tools, seamless device syncing, and robust library management with OPDS and Calibre support. Enjoy a distraction-free reading experience with customizable modes and multi-book viewing for enhanced study and analysis.
- OPDS Online Libraries
- Calibre Integration
- Sync Across Devices
- Bookshelf Management
- Customizable Reading Modes
- Multi-Book View
- Advanced Annotations & Highlights
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Readest is an ebook reader for people who read a lot, and who want their books, notes and reading position on whatever device is nearest. Open EPUB, PDF, MOBI, AZW3, FB2, CBZ, TXT and Markdown in one library. Pull books from OPDS catalogs or from your own Calibre server. Read, annotate, listen, translate. Made for iPhone and iPad • CarPlay, so you can keep listening on the road with playback controls on the dashboard • Download read-aloud voices per book and listen with no connection at all • Add books from Files, Mail or any share sheet, and read them in place instead of copying them into a second library • Open up to four books at once on iPad and arrange them how you like Reading • Paginated or scrolling, with custom fonts, themes, spacing and margins • Vertical text for CJK books • Contrast and refresh tuned for e-ink screens • Full-text search inside a book Your library • Browse, search and download from OPDS catalogs and public libraries • Connect to Calibre or Calibre-Web, covers and metadata included • Organize with bookshelf groups you can rename Notes • Highlights, bookmarks and structured notes • Copy a highlight together with a deep link back to the passage • Export your annotations Listening and languages • Text-to-speech with downloadable offline voices • Translate a sentence, a page, or an entire book • Wikipedia and dictionary lookup without leaving the page Sync • Readest Cloud, or bring your own: iCloud, Google Drive, OneDrive, WebDAV, S3 • KOReader sync keeps your progress in step with your e-reader • iPhone, iPad, Mac, all other platforms and the web Readest is open source. Support: support@readest.com Privacy Policy: https://readest.com/privacy-policy Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Lios Calibre Viewer
Access and read your entire book collection from your computer on your iPad or iPhone. Organize books by category and download them for offline reading, saving device space. Browse your library quickly with locally stored book names and cover art.
- Stream Calibre library
- Download books for offline reading
- Organize books by category
- Quick library browsing
- Save device space
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View your entire calibre library streamed from your host computer to your iPad or iPhone. Download the books to the device and read the books anywhere. Organize your books by category or by the books you choose to download. Your entire library of book names and cover art are stored locally for quick browsing. The books are only downloaded on device when you choose to download them, saving space on your phone or tablet.
Screenshots
Verdict
The clearest difference is price: Readest at Free against Lios Calibre Viewer's $2.99. Readest also leads on ratings volume (196 vs 3). Lios Calibre Viewer's advantage is in-app purchases (none vs 9) and review sentiment (100% vs 84%). On rating, ads, device support and iOS requirement 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
Readest is free to download; Lios Calibre Viewer costs $2.99 up front. Readest sells 9 in-app purchases, starting at $4.99 per month. Lios Calibre Viewer asks for nothing beyond the download.
Readest holds the better App Store score, 4.5 against 4.3. That said, the two scores are not equally well evidenced: Readest has 196 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 84% of Readest's written reviews are positive against 100% of Lios Calibre Viewer's, so the app with the better star average is not the one people write more warmly about.
Readest ships an update fortnightly, Lios Calibre Viewer every 5 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.
| Parameter | Readest | Lios Calibre Viewer |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 4.5 (196 ratings) — better | 4.3 (3 ratings) |
| Positive reviews | 84.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 196 — better | 3 |
| Update frequency | Fortnightly | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 16.4 | 16.0 — better |
| Further details — not scored | ||
| Size | 58 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Bilingify LLC | Antonio Torres |
Customer experience
Readest
Lios Calibre Viewer
In-app purchases
Readest
- Subscribe to Plus Plan$4.991 Month
- Subscribe to Pro Plan$9.991 Month
- Subscribe to Plus Plan$49.991 Year
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- Subscribe to Pro Plan$99.991 Year
- 1 GB$9.99
- 2 GB$14.99
- Full Customization$19.99
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- 5 GB$29.99
- 10 GB$49.99
Lios Calibre Viewer
No in-app purchases
Questions
Is Readest free?
Is Lios Calibre Viewer free?
Which has better reviews, Readest or Lios Calibre Viewer?
Do Readest or Lios Calibre Viewer have ads?
Which is updated more often, Readest or Lios Calibre Viewer?
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