Features & Capabilities

All in one Calibre libraries on your iPhones and iPads. Now equipped with Full text search feature and Multilingual User Interface!

Lifetime support, no extra charge, no subscription fee.

Calibre Sync can:

  • help you access full Calibre libraries on most popular personal cloud services, including Google Drive, Dropbox, Microsoft OneDrive, Box, pCloud, MEGA, iCloud, WebDav, Nextcloud, OwnCloud, and TeraBox - simply the most supported for cloud services.
  • transform your device to a smart device emulator that connects to Calibre wirelessly. It even supports Calibre libraries on your external storage and from Calibre Content Server or Calibre-web with amazing performance.

Move your Calibre libraries to your favourite cloud providers and access those libraries via Calibre Sync to browse, sort, search, download and read books on your device. Calibre Sync also supports multiple libraries across multiple Drive, Dropbox, OneDrive, Box, pCloud, MEGA, iCloud, WebDav, Nextcloud, OwnCloud, and TeraBox accounts simultaneously.

Features:

  • Unlimited Calibre libraries
  • Wireless connect to Calibre effortlessly as Smart device
  • Easy switch between multiple libraries across multiple accounts
  • Automatic check and update libraries when launching the app
  • Pull, Refresh or Remove a library from Calibre Sync
  • Support different book list layouts: List - detailed and simple, Grid, and Carousel
  • View your library statistics
  • Send books to Kindle with ease
  • Search across all of your available libraries
  • Search books by title, authors, and even in comments and custom columns
  • Filter books on authors, series, tags, language, publishers, formats and in custom columns
  • Sort libraries by title, author, ratings, and several Date options - ascending and descending
  • Filter downloaded books
  • Configuration for each library download location
  • Support for custom columns in book details view
  • Quick access to book download and share via slideable list view
  • Zoom the book cover
  • Support "swipe from book to book" in book details view
  • Email or share a copy of downloaded book
  • Open downloaded book in your book reader application to read a book
  • View the file size of each book format
  • Show book identifiers and link to source (like ISBN, Amazon, Google Books, Goodreads, etc)
  • Dark/light themes
  • And many more features...

To move your Calibre library to cloud services:

  1. Open Calibre on your Laptop/PC/Desktop
  2. Select "Switch/create library..." from the Calibre menu
  3. Select an empty folder on your Cloud drive in "New Location" drop down
  4. Select "Move current library to new location", then press OK
  5. Wait for cloud sync to complete.
  6. Then you are ready to use Calibre Sync.

To move your Calibre library to your phone storage, just copy the library directory to your phone storage.

Notes:

  • Calibre Sync is not a reader app. You must install and use one of the many excellent reader apps available.
  • Only Microsoft OneDrive for Personal accounts (shared) are supported. Please email us if you observe any inconsistencies.
  • Due to restriction in Box API, Calibre Sync must acquire write permission in order to download files, download is not a read action on Box. Calibre Sync guarantees that it will not perform any write actions against your data in Box cloud account.
  • Calibre Sync use WebDav API of Nextcloud and OwnCloud services, and it requires case sensitive file system to work properly. Therefore, you must make sure that your libraries are set up on case sensitive file system (Linux, recent MacOS, Windows NTFS with case sensitive enabled).

Please leave your reviews and suggestions to help us improve the app. For more information see https://calibresync.bitbucket.io

Calibre is © Kovid Goyal - calibre-ebook.com Drive is © Google LLC. Dropbox is © Dropbox inc. OneDrive is © Microsoft Box is © Box inc. pCloud is © pCloud AG Nextcloud is © Nextcloud GmbH OwnCloud is © OwnCloud MEGA is © MEGA iCloud is © Apple Inc TeraBox © Flextech Inc

User Growth & Download Statistics

App
By:
DUONG THUY PHAM
Rating:
3.80
(53)
Version:
6.8.11 Last updated: 2026-05-25
Version code:
886070435
Creation date:
2022-02-16
Compatible devices:
Size:
132.55MB
Price:
4.99
URLs:
Privacy policy
Full description:
See detailed description
Source:
Apple Apps Store
Data ingested on:
2026-06-07
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.
Developed by:
DUONG THUY PHAM
Apple Apps Store
https://apps.apple.com/us/app/calibre-sync/id1609138078

User Reviews

Calibre Sync is praised for delivering mobile access to cloud-based Calibre libraries, multi-library support, local file storage, and robust organization features. However, its major drawbacks center on Calibre 9 compatibility: many users report broken syncing and deprecated DB columns. Other recurring complaints include slow or unresponsive developer support, intermittent syncing failures, and a lack of iCloud integration. Overall, it’s a strong tool when it works, but many users experience reliability and compatibility issues that hamper long-term use.
Pros
  • Cloud-based Calibre library access on iOS with fast syncing and quick downloads.
  • Supports multiple Calibre libraries and stores books in a Files-accessible local folder.
  • Advanced organization features, including powerful filtering with virtual views and a zoomable grid.
  • Easy browse/search and ability to share/download books to other reader apps.
  • No ongoing subscription required (one-time purchase).
Cons
  • Incompatibility with Calibre version 9 causing broken syncing and deprecated database columns.
  • Unresponsive or slow developer support; difficulty getting help.
  • Unreliable syncing after initial use; failures to sync new books or connect.
  • No iCloud integration; missing essential cloud integration.
Recent reviews
I’ve been running a content server for about 4 years and my library is closing in on 20k titles. i provide access to numerous friends and family, but my limited internet connection makes the content server’s web UI a bit sluggish. After trying Calibre Sync and seeing how well it works in providing access and grabbing content, I have nearly all my users using it on android and ios. it works great!
by Tr*****, 2026-05-29

Notice reappears every launch even without configured cloud accounts/keychain use.”
by ye*****, 2026-05-18

The new update is working for me as of this writing! Syncing worked without any hiccups. I just can’t seem to keep the Important Notice from showing up every launch. Love this app!
by re*****, 2026-04-04
View all user reviews ›

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