Comparison

Calibre ebook reader vs Sutra

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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

About

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.

Highlights
  • 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
Features
Read full description

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

Calibre ebook reader4 screens
Sutra4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
Calibre ebook reader versus Sutra: the parameters behind the verdict, then further details
ParameterCalibre ebook readerSutra
PriceFreeFree
Rating4.6 (18 ratings) — better4.3 (17 ratings)
Positive reviews50.0% of reviews73.3% of reviews — better
Number of ratings18 — better17
Update frequencyEvery 9 daysWeekly — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.017.0 — better
Further details — not scored
Size88 MB42 MB
Age rating4+4+
DeveloperVISIONCRAFT, SOCIEDAD LIMITADAKoustav Dasgupta

Customer experience

Calibre ebook reader

All ratings18 ratings
Positive88.9%
Neutral5.6%
Negative5.6%
Written reviews4 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Sutra

All ratings17 ratings
Positive76.5%
Neutral17.6%
Negative5.9%
Written reviews15 reviews
Positive73.3%
Neutral13.3%
Negative13.3%

In-app purchases

4 purchases

Calibre ebook reader

Subscriptions3
  • Pageo Pro3 Days trial$4.991 Month
  • Pageo Pro$4.991 Month
  • Pageo Pro3 Days trial$19.991 Year
One-time1
  • 1 Day of Pro$0.99
4 purchases

Sutra

One-time4
  • Small Tip$1.99
  • Medium Tip$2.99
  • Large Tip$4.99
Show 1 more
  • Sutra Pro$6.99

Questions

Is Calibre ebook reader free?
Calibre ebook reader is free to download, with in-app purchases available.
Is Sutra free?
Sutra is free to download, with in-app purchases available.
Which has better reviews, Calibre ebook reader or Sutra?
Calibre ebook reader is rated higher. Calibre ebook reader averages 4.6 out of 5 from 18 ratings, while Sutra averages 4.3 from 17 ratings.
Do Calibre ebook reader or Sutra have ads?
Calibre ebook reader shows ads; Sutra does not.
Which is updated more often, Calibre ebook reader or Sutra?
Calibre ebook reader ships an update every 9 days, and Sutra weekly. Most recently, Calibre ebook reader was updated on November 5, 2026 and Sutra on October 31, 2026.

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