Comparison

Calibre Sync vs Simple Dict Mobile Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Calibre Sync

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.

Highlights
  • 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
Features
Read full description

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

About

Simple Dict Mobile Pro

This app provides a fast and efficient offline dictionary experience, supporting various formats like zim, mdx, and dsl. It offers multiple search methods and a 'reading area' to save and track your lookups.

Highlights
  • Offline dictionary functionality
  • Supports zim, mdx, dsl formats
  • Keyword, regex, and fuzzy search
  • Reading area for saved entries
  • Lightweight and high-performance indexing
Features
Read full description

A simple, lightweight, and high-performance offline dictionary that easily indexes and searches large dictionary files. Currently supports dictionary formats: zim (Wikipedia), mdx, dsl. **Features:** 1. Multiple search methods: Supports keyword search, regular expression matching, and fuzzy search, helping you easily find target entries in large dictionaries. 2. "Reading Area" function: You can add entries you want to look up to the reading area. The app will save the entry's open state for easy access anytime. It also records the reading progress, and when the app is closed and reopened, the entry will automatically jump to the previous reading position. 3. Rich dictionary format support: This app currently supports zim, mdx, and dsl format dictionaries. There are many dictionaries available online for download, and there are also tools for creating your own dictionaries. 4. Lightweight and high-performance dictionary indexing: Fast startup and efficient search. You can add a large number of dictionaries without worrying about affecting the app's performance. 5. More features (such as reading history and favorites) will be added in future updates. **Note:** This app does not provide any dictionary content. You need to search, download, or create dictionaries in the corresponding format and import them into the app for use.

Screenshots

Calibre Sync4 screens
Simple Dict Mobile Pro3 screens

Verdict

The call

The clearest difference is rating: Calibre Sync at 3.9 against Simple Dict Mobile Pro's 1.0. Calibre Sync also leads on update cadence (weekly vs every 5 weeks) and ratings volume (55 vs 1). Simple Dict Mobile Pro's advantage is price ($0.49 vs $4.99). On ads, in-app purchases, monetization model and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Calibre Sync costs $4.99 and Simple Dict Mobile Pro $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Calibre Sync holds the better App Store score, 3.9 against 1.0. That said, the two scores are not equally well evidenced: Calibre Sync has 55 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Calibre Sync ships an update weekly, Simple Dict Mobile Pro every 5 weeks. Both last shipped on October 27, 2026.

Scorecard4 real differences · 6 level
Calibre Sync versus Simple Dict Mobile Pro: the parameters behind the verdict, then further details
ParameterCalibre SyncSimple Dict Mobile Pro
Price$4.99$0.49 — better
Rating3.9 (55 ratings) — better1.0 (1 ratings)
Positive reviews62.1% of reviews—
Number of ratings55 — better1
Update frequencyWeekly — betterEvery 5 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.0
Further details — not scored
Size128 MB36 MB
Age rating4+4+
DeveloperDUONG THUY PHAM培基 王

Bugs and requests

Calibre Sync

Reported bugs

29 issues
  • Popup reappears every launch
  • Calibre version 9 bricked the app
  • Database error
  • Stopped working since Calibre update
  • Error when changing DB
Show 24 more
  • Mega integration does not connect
  • Sync issues with Calibre v9
  • App broken since Calibre v9
  • Deprecated database columns
  • Stopped working recently
  • No longer compatible with Calibre v9
  • Sync fails
  • Failed to download metadata
  • Cannot connect to server
  • Does not work with Dropbox
  • Highlights not saved in PDF
  • Syncing new books stopped
  • Cannot use preferred mail app
  • Cannot automatically send to Kindle
  • Cannot launch preferred app from this app
  • Unable to read most book covers
  • Horrible file finding
  • Does not work on iPad after update
  • App won't find files on local storage
  • Failed to download metadata from Nutstore
  • Cannot connect to server at all
  • Cannot sync Calibre to iPad
  • WebDAV not working
  • SMB not working

Requested features

18 requests
  • More customizability with viewing options
  • Integrated ebook reader
  • Mark books as favorites
  • Calendar feature for reading
  • Use configured mail app
Show 13 more
  • Option for 'automatically send to Kindle'
  • Set preferred reading apps by type
  • Launch preferred app from this app
  • AI services for translation and text-to-speech
  • Display bookshelves
  • Update FAQ and provide YouTube tutorial
  • iCloud integration
  • Support for more cloud services
  • Ability to add book directly to cloud library
  • Mark books as read/unread and sync back
  • Support for multiple libraries
  • Local storage accessible via Files app
  • Virtual view explanation

Simple Dict Mobile Pro

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Calibre Sync

No in-app purchases

None

Simple Dict Mobile Pro

No in-app purchases

Questions

Is Calibre Sync free?
Calibre Sync costs $4.99, with no in-app purchases.
Is Simple Dict Mobile Pro free?
Simple Dict Mobile Pro costs $0.49, with no in-app purchases.
Which has better reviews, Calibre Sync or Simple Dict Mobile Pro?
Calibre Sync is rated higher. Calibre Sync averages 3.9 out of 5 from 55 ratings, while Simple Dict Mobile Pro averages 1.0 from 1 ratings.
Do Calibre Sync or Simple Dict Mobile Pro have ads?
Neither Calibre Sync nor Simple Dict Mobile Pro shows ads.
Which is updated more often, Calibre Sync or Simple Dict Mobile Pro?
Calibre Sync ships an update weekly, and Simple Dict Mobile Pro every 5 weeks. Most recently, Calibre Sync was updated on October 27, 2026 and Simple Dict Mobile Pro on October 27, 2026.

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