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Android Apps > Books & Reference > Calibre Sync
Calibre Sync icon

Calibre Sync

by BIL studio · Books & Reference · $5.49
On Google Play since April 2020 · Data updated 2026-11-03

Calibre Sync is made and published by BIL studio. AppBrain is an independent app data site and isn't affiliated with BIL studio. The app name, icon, screenshots and description belong to BIL studio and are shown as published on Google Play.

AppBrain's verdict

Established
Rating on Google Play
3.59
347 ratings
Installs
15 thousand
Last updated
November 1, 2026
Ads
No ads
Size
36.5 MB

Calibre Sync has 15 thousand installs. Users are divided: 3.6 stars from 347 ratings.

Official page on Google Play

Pros & Cons

  • Extensive cross-cloud support (Google Drive, Dropbox, OneDrive, Box, pCloud, MEGA, WebDav, Nextcloud, OwnCloud).
  • Unlimited Calibre libraries across multiple accounts for flexible organization.
  • Wireless device emulation enables seamless access to Calibre libraries.
  • Cross-library search, statistics, and fast updates improve discovery and management.
  • Not a dedicated reader app; requires a separate e-book reader to open titles.
  • Only Microsoft OneDrive Personal accounts are supported; Box API caveats apply.
  • Complex setup for case-sensitive file systems and specific cloud configurations.

User feedback

Ratings and reviews on Google Play

Comments on Calibre Sync for Android

★★★★★ Daniel Montesinos · Sep 24, 2026
Great companion for Caliber. Works both work local and remote libraries and can sort and filter by tags, connections, etc.
★★★★★ John Young · Sep 30, 2026
The app works great, and does exactly what I need it to do, to take full advantage of my Caliber library.
★★★★☆ Anke Kellermann · Dec 21, 2024
It's great if you can't sync other apps, but updating doesn't seem to work for me, and I keep having to uninstall to update books.
★☆☆☆☆ Mike Klodnicki · Feb 12, 2025
Developer is no longer responsive. UI is a nightmare. It was worth a shot, but there's just not a proper offline caliber library browser app out there.
★☆☆☆☆ James Herman · Mar 30, 2026
Caliber v9.0 changed its db and as a consequence, Caliber Sync now fails to update. Last update to Caliber Sync was 1 APR 2025. I have not been able to Sync since at least early January 2026, coinciding with Caliber's v9.0 upgrade. Specifically, Caliber Sync on OneDrive generates a "metadata true failed to load library info" error on sync. Gemini indicates the problem is widespread and due to major change in the Caliber db with v9.0. Ostensibly, introduced to improve performance.
★☆☆☆☆ Leshawn Jackson · Apr 19, 2026
Do not pay for this app! The Caliber sync doesn't work and when I use one drive you can't even open the books on it, you need another reader.

Google Play Rating history and histogram

170
44
26
41
67

Store listing

By BIL studio, from Google Play

“All in one Calibre libraries on your phones and tablets with Full text search.”

Calibre Sync Screenshot 1 of 9
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Screenshots by BIL studio, from the Google Play listing
Description by BIL studio Written by the developer, not by AppBrain. Click to read.
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, WebDav, Nextcloud, OwnCloud, TeraBox and Proton Drive - 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 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, WebDav, Nextcloud, OwnCloud, TeraBox and Proton Drive 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
- 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
TeraBox is © TeraBox
Proton Drive is © Proton AG

Recent changes:
- New feature: advanced library search.
- UI improvement: remember scroll position in filter page.
- UI improvement: book summary to detailed and simple list views.
Official page on Google Play Also on the App Store

Safety and technology

Found in the app by AppBrain
Ads
No ads
Price
$5.49
Libraries
31
App size
36.5 MB
Needs Android
4.4+
Content rating
Everyone

Technologies used by Calibre Sync

9 permissions · 31 libraries
Subscribe to see full permission and library details

Releases

Updates seen on Google Play
Version
6.13.0
Launched
April 2020
  • Nov 1, 2026UpdateVersion 6.13.0
  • Sep 24, 2026UpdateVersion 6.11.0
  • Aug 12, 2026UpdateVersion 6.10.6
  • Jul 21, 2026UpdateVersion 6.10.4
  • Jun 13, 2026UpdateVersion 6.9.1
Show all changes Show fewer

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Also available on the App Store

Calibre Sync icon Calibre Sync
DUONG THUY PHAM
3.9
$4.99
55 ratings

Installs

Tracked by AppBrain
Last 30 days
160
Play install range
10+ thousand
Launched
April 2020

Installs over time

Calibre Sync has been installed 15 thousand times. Over the past 30 days, it has been installed 160 times.

Rankings

Google Play top charts

Google Play Rankings for Calibre Sync

This app is not ranked

About the app and developer

About Calibre Sync

Calibre Sync is a books & reference app developed by BIL studio.

How many times has Calibre Sync been downloaded?

Calibre Sync has been downloaded 15 thousand times. In the last 30 days, the app was downloaded 160 times.

What is the rating of Calibre Sync?

Calibre Sync is rated 3.59 out of 5 stars, based on 350 ratings.

Is Calibre Sync free?

Calibre Sync costs $5.49. The APK size is 36.47 MB. The latest APK version available is 6.13.0. The last update was on November 1, 2026.

What are the requirements for Calibre Sync?

Calibre Sync requires Android 4.4+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since April 2020.

App Performance Report

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Developer information for BIL studio

BIL studio

calibre.sync.help@gmail.com

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