Calibre Sync vs Astrysk
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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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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
Astrysk
This open-source application provides a unified remote control for self-hosted services. It currently supports managing Proxmox servers and running Large Language Models via Ollama, with more features planned.
- Unified remote control
- Open-source
- Self-hosted manager
- Proxmox management
- Ollama LLM support
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Experience the power of control with Astrysk, your ultimate open-source self-hosted manager. Available Applets: - Proxmox (For managing Proxmox servers) - Ollama (For running Large Language Models - LLMs) Applets and more features coming soon! Please note: Astrysk is purely a remote control application and does not offer any functionality without the accompanying software installed on a server.
Screenshots
Verdict
The clearest difference is price: Astrysk at Free against Calibre Sync's $4.99. Calibre Sync's advantage is rating (3.9 vs 3.0) and in-app purchases (none vs 4). On review sentiment, update cadence, ads 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
Astrysk is free to download; Calibre Sync costs $4.99 up front. Astrysk sells 4 one-off in-app purchases. Calibre Sync asks for nothing beyond the download.
Calibre Sync holds the better App Store score, 3.9 against 3.0. That said, the two scores are not equally well evidenced: Calibre Sync has 54 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 62% of Calibre Sync's written reviews are positive against 67% of Astrysk's, so the app with the better star average is not the one people write more warmly about.
Calibre Sync ships an update weekly, Astrysk every 8 days. The most recent releases landed on September 24, 2026 and June 24, 2026 respectively.
| Parameter | Calibre Sync | Astrysk |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 3.9 (54 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 62.4% of reviews | 66.7% of reviews — better |
| Number of ratings | 54 — better | 2 |
| Update frequency | Weekly — better | Every 8 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 136 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | DUONG THUY PHAM | Abayomi Ikuru |
Customer experience
Calibre Sync
Astrysk
In-app purchases
Calibre Sync
No in-app purchases
Astrysk
- Buy Me A Soda$0.99
- Buy Me A Coffee$2.99
- Buy Me A Beverage$4.99
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- Buy Me A Meal$9.99









