Calibre Companion

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5.16K reviews
Content rating
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About this app

"100 Best Android Apps of 2019" - PCMag

Calibre Companion (CC), recommended by calibre developers, is three applications in one:
- a superb device-based calibre library organizer
- a high-performance WiFi-based calibre device emulator
- a calibre content server and cloud provider (Dropbox, Box, Google Drive, Microsoft OneDrive, and Amazon Cloud Drive) client

1) CC is a device-based calibre library organizer. Once you put books on your device using one of the connection methods described below you can:
- view a book's metadata (author, tags, series, rating, dates, etc.).
- sort and group books by their metadata.
- see book lists by cover or by list.
- mark books read and sync this information with calibre.
- launch your book reader application to read a book (works with most reader applications except for Amazon Kindle for Android on non-Fire devices).

2) CC can connect to calibre over WiFi and be detected by calibre as a device. Once connected, you use calibre to move books to and from your device. Calibre automatically updates all the book metadata stored by CC to match the latest in your library.

3) CC can connect to calibre’s content server or to your cloud provider to browse your library and download books to your device. Cloud providers currently supported: Dropbox, Box, Microsoft OneDrive, and calibre libraries on the device or on an SD card.

For more information see our FAQ (

1) CC is not a reader app. You must install and use one of the many excellent reader apps available.
2) CC requires that you use calibre calibre 0.9.02 or later, available at Some CC features such as syncing book read information require newer versions of calibre.

A free demo version of CC is available in the Google Play store. Install and test with that version if you have concerns that CC won't work on your network or isn't what you need. To get it, go to and click the button for the demo version (links to Google Play don't work here).

Permissions explanation:
- Allow Wi-Fi multicast reception: multicast is required to be able to find calibre without requiring you to enter an IP address.
- Users with Jellybean (Android 4.1): You will also see a permission about “Test access to protected storage”. This is caused by a change Android is making regarding SD card access, and simply means our app can save books on your external storage.
Updated on
Nov 7, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

2.82K reviews
Zsolt Szabo
February 29, 2024
While trying to connect to my local content server, I received an error message stating my (device) library is read-only, and to "see faq"--an external link to a website that no longer exists. Regardless, the likely reason for the error is the way file access permissions are handled differently in newer versions of Android--meaning, if you receive this error, there isn't much you can do, besides petition the custodian of this app to make the requisite changes to get it minimally functional again
2 people found this review helpful
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JF Erikson
December 18, 2023
I have loved Calibre Companion for years. Smooth transfers and syncs made it one of most favorite applications. The latest (in a long term without them) update has completely shaken my faith in the developer. I am currently unable to see, much less remove or add, files to my library. There is a link for what to do if this happens, but the link is to a blank page.
62 people found this review helpful
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Mike O'Sullivan
February 17, 2024
Broken abandonware - avoid. Developer has abandoned the app - latest version is broken, and will break your ability to sync with Calibre, and connect with reader apps on your device. Changes to Android security mean the dev has released a simple update only, to stop the app being removed from the App store, but he didn't bother checking to make sure the app still worked properly. Either find a replacement sync tool, or rollback to an earlier version that still works via apk.
10 people found this review helpful
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What's new

- Updated App to handle dark mode
- Minor UI improvements
- Added support for latest mobiles and tablets