Published by Samuel Cohen on Nov 7, 2023

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About Calibre Companion

1. 1) CC is a device-based calibre library organizer. - view a book's metadata (author, tags, series, rating, dates, etc. ). - 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.

2. To get it, go to and click the button for the demo version (links to Google Play don't work here). - 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”.

3. 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.

4. 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.

5. Cloud providers currently supported: Dropbox, Box, Microsoft OneDrive, and calibre libraries on the device or on an SD card. 1) CC is not a reader app.

6. Once connected, you use calibre to move books to and from your device.

7. 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.

8. A free demo version of CC is available in the Google Play store.

9. Install and test with that version if you have concerns that CC won't work on your network or isn't what you need.

Calibre Companion Customer Insights

1. Then I want the app to show me my local on device catalogs up front, let me switch between these catalogs, browse the books, mark books as read (and sync that status to Google Drive, and archive them from the main list) and open the book in my preferred reader.

2. I can still send books to the device, but it seems meta-data sync has stopped working so changes made in Calibre are not being sent to the device and I just found that none of the books I've read in a while now have been marked as read in Calibre.

3. Instead this is the flow I have to use: whenever I add a new book to Calibre, have to go into CC reconnect to Google Drive, navigate to the catalog, click Titles so I view them all then sub-menu > Download All -- and then it tells me that 90% of my books don't have acceptable format/extensions.Exactly what I need.

4. I have several Calibre catalog's and all I really want is the app to connect once to Google Drive, make note of which Calibre catalogs I have and then automatically sync their contents behind the scenes to my Android device with no further interactions.

5. It's almost like a mobile version of Calibre, only that it doesn't include a viewer, but it works flawlessly with your third party viewer app of choice.I initially tried the demo version which was very easy to use.

6. Makes it super easy to wirelessly send my Calibre books to my phone.

7. :( Almost at the two year mark with no updates.Followed all of the instructions and it won't allow me to connect, so I have no way to read books on my phone because I can't access them.

8. However, taking the defaults this allows you to keep your books sync'd and gives several options for how you read them.The interface is so incredibly clunky.

9. Now I can't get it to sync wirelessly with Calibre I have to have internet Drive.Excellent interface with Calibre.

10. It also performs the function of a mobile Library, making it easy ro browse my synced book collection on my phone - even showing my custom metadata fields.

11. When you connect to your Google Drive, navigation is super slow as it scans everything rather than let you just navigate to your library.

Steps to Troubleshoot & Fix Calibre Companion Issues

1. Fix Calibre Companion Not Working/Crashes/Errors/Unresponsive & Black/White screen:

  1. Restart Calibre Companion: Restarting the app will resolve most errors.
  2. Update the Calibre Companion App. Here is how:
    1. On Android goto PlayStore » Search for "Calibre Companion" » Open Calibre Companion » click "Update".
    2. On iPhone, goto AppStore » Your profile » Available Updates » Check for Calibre Companion » click "UPDATE".
  3. Clear Calibre Companion app cache: Clearing cached data will force your app to retrieve the latest data directly from Calibre Companion servers.
    1. On Android, goto Settings » Apps » Select "Calibre Companion" » click Storage » click "Clear Cache".
  4. Check Calibre Companion app permissions. If any of these permissions required to use your device's features are disenabled, Calibre Companion might not work.
  5. Uninstall and reinstall Calibre Companion. If nothing else has worked, completely uninstall Calibre Companion then reinstall.
  6. Restart your device. Last, restarting your device can often clear most problems causing Calibre Companion not working

2. Fix Calibre Companion Server issues & Internet Connection

  1. Check network connection: An unstable Internet will make Calibre Companion be unable to connect to it's servers. Ensure your wi-fi is working then restart app.
  2. Disable VPN: VPN can cause connection errors and lead to Calibre Companion not working. Make sure all VPNs are off
  3. Enable background data: When Background data is turned off, Calibre Companion may not be able to connect to the Internet when running in the background.

Reported Issues

Note: Issues displayed have already been sent to the developer and are older than 7 days.

  • I just got a new Samsung (A53) phone. On my old Samsung (A20) phone I have lots of downloaded Calibre files with lots of annotations in them. I did a Smart Switch that transferred all (or most) of my files from my old phone to my new phone. But when I open Calibre Companion on my new phone, I don't see any of the files that I see when I open Calibre Companion on my old phone. I think that those files are somewhere on my new phone, but wherever they are Calibre Companion on my new phone doesn't know about them. Can you help?


    — by Martin Zwick 1 year ago

  • Bonjour

    J'ai un très grand nombre de livres sur ma tablette. J'aimerais séparer cette bibliotheque en plusieurs et les gérer avec calibre companion. Est ce possible? Si oui comment?

    — by MICHEL REA 2 years ago

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