Calibre Sync

Calibre Sync

All in one Calibre libraries

55 ratings
87 reviews
$4.99

Details

Released
February 16, 2022
Updated
October 15, 2026

Features

Calibre Sync screenshot #1 for iPhone
Calibre Sync screenshot #2 for iPhone
Calibre Sync screenshot #3 for iPhone
Calibre Sync screenshot #4 for iPhone
Calibre Sync screenshot #5 for iPhone
Calibre Sync screenshot #6 for iPhone
Calibre Sync screenshot #7 for iPhone
Calibre Sync screenshot #8 for iPhone
Calibre Sync screenshot #9 for iPhone
iphone
ipad
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About

Access and manage your Calibre ebook libraries from various cloud services or wirelessly connect to your desktop. Browse, search, download, and organize your books on your device. Supports multiple libraries and accounts.

✓Access Calibre libraries on cloud services
✓Wireless connection to Calibre
✓Supports multiple libraries and accounts
✓Browse, search, and download books
✓Organize books with filters and sorting
✓Send books to Kindle
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What users say about Calibre Sync

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What's New in Calibre Sync

6.12.1

October 15, 2026

- Improve unicode normalisation - UI fix for send to Kindle/device

User reviews

Ne fonctionne plus …

C’était bien avant ….

Tolle Calibre App

Mit dieser App ist es perfekt. Calibre auf dem PC, Bibliothek in der Cloud, die Calibre Sync App auf dem IPad. Alles da um bequem zu suchen und dann das gewünschte Buch in den Reader der Wahl zu laden. Lässt keine Wünsche offen.

Finally

Update 2: It’s working again and I can’t rate the new dev highly enough for knowing there was a niche that needed to be filled and picking up the torch. Thank you for seeing the value in this.

Update: Calibre version 9 bricked it, if you absolutely rely on this app stay on the latest version of 8, doesn’t look like anyone’s seen a developer response for a fix in a few weeks now. Brilliant 5 star app, really hoping the dev returns to it.

There’s a few things I’ve learned in all my time spent meticulously curating, indexing, and cataloging my library through calibre and one of those is that certain file types, regardless of what you assign them in Calibres own metadata fields, do not hold certain types of metadata. So PDFs (and irritatingly enough, CBR/Zs) aren’t capable of being organised by series in e-readers. They also struggle with cloud syncing in the way that while they sync physical files, they won’t just show what you have in your cloud for download, and they certainly don’t keep that organised either.

CalibreSync completely solves these issues by not only mirroring your calibre library the way you’ve designed it, but also by making your collection viewable and searchable without needing physical copies of the files on your device (via cloud syncing), and downloadable on demand, whilst still being able to scroll through them all in an easily accessible catalogue of your own design. You can even open your books from here into your chosen e-reader. This is exactly the type of app I needed, and well worth the payment.
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Excellent

Permet d’avoir sur son iPhone une ou plusieurs bibliothèques Calibre accessibles car stockées dans un service cloud. Permet de récupérer un/plusieurs livres et les ouvrir dans son lecteur favori. Bien sûr fonctionne en « lecture seule » sur le service cloud. Pas d’écriture vers le cloud.

Great app. Works well.

It worked great to connect to my Calibre library. Syncs easily and gives me a great way to browse through my collection.

User experience

🐞

Reported Bugs

29 issues

Popup reappears every launch

Bug

Calibre version 9 bricked the app

Bug

Database error

Bug

Stopped working since Calibre update

Bug

Error when changing DB

Bug

Mega integration does not connect

Bug

Sync issues with Calibre v9

Bug

App broken since Calibre v9

Bug

Deprecated database columns

Bug

Stopped working recently

Bug

No longer compatible with Calibre v9

Bug

Sync fails

Bug

Failed to download metadata

Bug

Cannot connect to server

Bug

Does not work with Dropbox

Bug

Highlights not saved in PDF

Bug

Syncing new books stopped

Bug

Cannot use preferred mail app

Bug

Cannot automatically send to Kindle

Bug

Cannot launch preferred app from this app

Bug

Unable to read most book covers

Bug

Horrible file finding

Bug

Does not work on iPad after update

Bug

App won't find files on local storage

Bug

Failed to download metadata from Nutstore

Bug

Cannot connect to server at all

Bug

Cannot sync Calibre to iPad

Bug

WebDAV not working

Bug

SMB not working

Bug
✨

Requested Features

18 requests

More customizability with viewing options

Feature

Integrated ebook reader

Feature

Mark books as favorites

Feature

Calendar feature for reading

Feature

Use configured mail app

Feature

Option for 'automatically send to Kindle'

Feature

Set preferred reading apps by type

Feature

Launch preferred app from this app

Feature

AI services for translation and text-to-speech

Feature

Display bookshelves

Feature

Update FAQ and provide YouTube tutorial

Feature

iCloud integration

Feature

Support for more cloud services

Feature

Ability to add book directly to cloud library

Feature

Mark books as read/unread and sync back

Feature

Support for multiple libraries

Feature

Local storage accessible via Files app

Feature

Virtual view explanation

Feature

FAQ

What does Calibre Sync do?

Calibre Sync allows you to access and manage your Calibre ebook libraries from popular cloud services like Google Drive, Dropbox, and OneDrive, or connect wirelessly to your desktop Calibre installation. You can browse, search, download, and organize your books directly on your mobile device.

How do I move my Calibre library to a cloud service for use with Calibre Sync?

To move your library, open Calibre on your computer, select 'Switch/create library...', choose an empty folder on your cloud drive as the 'New Location', select 'Move current library to new location', and press OK. Wait for the cloud sync to complete, and then you can use Calibre Sync.

Is Calibre Sync a free app?

No, Calibre Sync is a paid application. The description mentions lifetime support with no extra charge or subscription fee, indicating a one-time purchase model.

What devices is Calibre Sync compatible with?

The app is designed for mobile devices and connects to Calibre libraries stored on cloud services or your computer. It is not a reader app itself, so you will need a separate ebook reader application installed on your device to open and read downloaded books.

Can I use Calibre Sync to read books?

No, Calibre Sync is not a reader app. Its primary function is to manage and provide access to your Calibre libraries. You will need to open downloaded books using a separate ebook reader application installed on your device.