Calibre ebook reader vs Sutra
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calibre ebook reader
Seamlessly sync your Calibre ebook library wirelessly to your iPhone. Convert various ebook formats to EPUB directly within the app and customize your reading experience with adjustable fonts, themes, and spacing. Listen to your books with text-to-speech functionality.
- Wireless Calibre library sync
- Built-in ebook converter (PDF, MOBI, AZW, etc. to EPUB)
- Customizable reading experience (fonts, themes)
- Text-to-speech audiobook functionality
- Import from cloud storage (Files, Dropbox, iCloud)
- Organize library by author, series, collection
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Pageo is a Calibre companion app for iPhone and iPad: a Calibre ebook reader that syncs your library over Wi-Fi in both directions, converts any ebook to EPUB and reads your books aloud in 31 languages. It connects directly to the Content Server built into Calibre — no cables, no account, no hassle. ▶ TWO-WAY CALIBRE SYNC Turn on the Content Server in Calibre (Mac, Windows or Linux) and Pageo finds it on your local network, or connect by address. Books come to your iPhone or iPad — and your reading position, finished books, ratings and highlights go back to your computer, into Calibre's own annotations. Download one book or the whole library in a tap. ▶ ALL YOUR CALIBRE LIBRARIES — EVEN WITH YOUR COMPUTER OFF Multiple Calibre libraries: browse one at a time or all at once, with separate progress for every book. Or open a Calibre library folder straight from iCloud, Dropbox or this device — no server needed. ▶ PICK UP WHERE YOU LEFT OFF With Pageo Pro, your place, bookmarks and highlights follow you between iPhone and iPad through iCloud — with or without Calibre. Just add the same book on each device. ▶ BUILT FOR CALIBRE POWER USERS Table view puts the columns you built in Calibre into a desktop-style layout — sort by any column, pin titles, jump with the A–Z rail. Search your whole library with Calibre's own search syntax, or search inside every book, even ones you haven't downloaded yet. Series, tags and the author sort you set in Calibre carry over. ▶ CONVERT ANY EBOOK PDF, MOBI, AZW, AZW3, FB2 and CBZ/CBR comics become clean EPUBs right on your device — no desktop, no extra apps. A PDF's footnotes move to the end of the chapter, a tap away from their number. Anything Pageo can't convert itself, it hands to your Calibre server. Share a web page from Safari and it becomes a clean EPUB on your shelf. ▶ READ YOUR WAY Any iOS typeface or reading aids like OpenDyslexic, Atkinson Hyperlegible and Lexend. Focus Text, word spacing and hyphenation in your book's own language. Text up to 400%, six line-spacing and six margin settings. Light, dark and sepia themes, page or scroll mode, page curl or instant turns, right-to-left languages. Tap a picture to see it full screen and zoom in. Highlights, notes and bookmarks — export your annotations to a single file. Pageo remembers your place in every book. ▶ LISTEN TO YOUR BOOKS Turn any ebook into an audiobook with built-in read-aloud: ten lifelike voices, 31 languages, fully offline after a single download. The page follows the voice, and every language gets a natural pace. ▶ FIND ANYTHING FAST Search inside the book you're reading or across your whole library. Your books, chapters, highlights and bookmarks show up in Spotlight, and Siri Shortcuts let you say "Continue reading in Pageo" or "Listen to my book in Pageo". Home Screen widgets keep your current book and reading streak in view. ▶ YOUR LIBRARY, YOUR CONTROL Import from Files, Dropbox, OneDrive or iCloud Drive. Organize by author, series, tags or collection. Nothing to read yet? The Discover tab offers free public-domain classics from Project Gutenberg in many languages. Your books stay on your device — no account, no lock-in. ▶ FREE WITH OPTIONAL PRO UPGRADE Pageo is free to use with ads. Pageo Pro unlocks read-aloud, the converters and iCloud sync, and removes ads. Try Pro free for 3 days. ▶ COMMON QUESTIONS Does Pageo work with Calibre? Yes — with the Content Server built into Calibre on Mac, Windows and Linux. No plugin or connector to install. Does my reading sync between iPhone and iPad? Yes — through iCloud with Pageo Pro, or through Calibre. Does my computer need to be on? For server sync, yes. For a library folder in iCloud or Dropbox, no. Does reading progress sync back to Calibre? Yes — position, finished status, ratings and highlights. Do I need an account? No. Terms of Use (EULA): https://visioncraft.es/pageo-terms Privacy Policy: https://visioncraft.es/pageo-privacy-policy
Sutra
Access your entire book collection from various sources in one beautiful app. Enjoy a customizable reading experience with synced progress, bookmarks, and highlights across devices. Organize your library with series info, search, and collections.
- Connect Kavita, Calibre, and OPDS servers
- EPUB and PDF reading with page-curl effect
- Rich typography and reading themes
- iCloud sync for progress, bookmarks, and highlights
- Offline downloads
- Highlighting and search functionality
- Series grouping and collections
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Sutra is a warm, thoughtful home for every book and comic you love. Bring together your self-hosted library, your manga, your classic EPUBs, and those “just one more chapter” reads in one beautifully calm reader. Connect Kavita, Komga, or Calibre; explore any OPDS catalogue; or discover a new favourite from Project Gutenberg and Standard Ebooks. READ YOUR WAY • Enjoy EPUB, PDF, CBZ, MOBI, fixed-layout comics, and manga in one place • Move through comics panel by panel, or take in the whole page • Read right-to-left manga and beautiful iPad two-page spreads • Make the page yours with fonts, text size, spacing, themes, auto-scroll, page turns, and Sutra-only brightness control A LIBRARY THAT FEELS LIKE HOME • Browse dedicated Series and Collection views, with Favorites always close by • Sort by Recently Read, Title, Author, or Date Added while staying in a familiar cover grid • Let Sutra recover missing Calibre series details and keep your library beautifully organised • Pick up where you left off with dependable progress and finished-book sync for Kavita and Komga BUILT FOR SELF-HOSTERS • Connect Kavita, Komga, Calibre, Grimmory, or another OPDS server • Stream comic pages from Kavita and Komga when available, or download for offline reading • Keep your highlights and reading progress with you across your Apple devices Sutra is free to enjoy for EPUB and PDF reading, with no ads and no subscription. Unlock unlimited CBZ, MOBI, and Komga reading once, and keep it forever.
Screenshots
Verdict
The clearest difference is ads: Sutra at none against Calibre ebook reader's shown. Sutra also leads on monetization model (free vs free with in-app purchases) and review sentiment (73% vs 50%). Calibre ebook reader's advantage is rating (4.6 vs 4.3). On price, ratings volume, update cadence and in-app purchases 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. Calibre ebook reader sells 4 in-app purchases, starting at $4.99 per month and Sutra sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Calibre ebook reader holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 18 and 17 respectively. Written reviews complicate that: 50% of Calibre ebook reader's written reviews are positive against 73% of Sutra's, so the app with the better star average is not the one people write more warmly about.
Calibre ebook reader ships an update every 9 days, Sutra weekly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.
| Parameter | Calibre ebook reader | Sutra |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (18 ratings) — better | 4.3 (17 ratings) |
| Positive reviews | 50.0% of reviews | 73.3% of reviews — better |
| Number of ratings | 18 — better | 17 |
| Update frequency | Every 9 days | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 88 MB | 42 MB |
| Age rating | 4+ | 4+ |
| Developer | VISIONCRAFT, SOCIEDAD LIMITADA | Koustav Dasgupta |
Customer experience
Calibre ebook reader
Sutra
In-app purchases
Calibre ebook reader
- Pageo Pro3 Days trial$4.991 Month
- Pageo Pro$4.991 Month
- Pageo Pro3 Days trial$19.991 Year
- 1 Day of Pro$0.99
Sutra
- Small Tip$1.99
- Medium Tip$2.99
- Large Tip$4.99
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- Sutra Pro$6.99
Questions
Is Calibre ebook reader free?
Is Sutra free?
Which has better reviews, Calibre ebook reader or Sutra?
Do Calibre ebook reader or Sutra have ads?
Which is updated more often, Calibre ebook reader or Sutra?
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