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BookFusion
bookfusion.com
What it is
BookFusion is a digital library and reading service for organizing, reading, sharing and syncing eBooks across web, iOS and Android. Its reader supports PDF, MOBI and EPUB, and carries bookmarks, comments, highlights and reading progress between devices. Downloaded books are available offline. Readers can arrange titles by author, genre and custom tags, with rule-based Smart Shelves and Smart Queries also described. An official Calibre plugin syncs books and metadata using an API key and requires Calibre 5.0 or later; a KOReader plugin supports browsing the library, downloading books and syncing position and highlights. The store offers over 70,000 free eBooks as well as titles for purchase. Personal uploads must be DRM-free, and storage and maximum file size depend on plan. The Free plan allows 10 books and files up to 15 MB. Paid individual plans start at $1.99 per month billed yearly. Social reading is beta; discovery is coming soon, while lending and borrowing are upcoming.
Spec sheet
- What it does
- BookFusion is a cloud reading and library-management service for ebooks, audiobooks, articles, PDFs, comics, videos, highlights and notes with cross-device synchronization.Read 14 Oct 2026 · docs.bookfusion.com
- Product
- BookFusion is a digital library and reading platform for organizing, reading, sharing, and syncing eBooks across devices.Read 8 Oct 2026 · bookfusion.com
- Audience
- BookFusion describes solutions for readers, publishers and authors, businesses, educational institutions, and enterprises.Read 8 Oct 2026 · bookfusion.com
- Privacy
- The privacy policy says BookFusion does not sell personal information to third parties and describes collecting account, uploaded content, and reading activity data.Read 8 Oct 2026 · bookfusion.com
- Support
- The reader plans list email support, with priority email support on Advanced and Power; the pricing page gives [email protected] for critical bugs.Read 8 Oct 2026 · bookfusion.com
- API status
- A BookFusion representative stated on Reddit that the API used by integrations was not yet public and that a permissioned developer portal was planned.Read 14 Oct 2026 · reddit.com
- Browser extension
- A browser-extension beta provides Chrome and Firefox installation instructions for saving web articles.Read 14 Oct 2026 · support.bookfusion.com
- Business analytics
- Business accounts provide reader analytics including who reads and how long they spend reading.Read 14 Oct 2026 · bookfusion.com
- Business distribution
- Organizations can distribute content through the reader app, email or coupon codes and grant or revoke access for users.Read 14 Oct 2026 · bookfusion.com
- Business security
- BookFusion says its business DRM uses encryption methods comparable to those used by major banks and secures content on web and mobile devices.Read 14 Oct 2026 · bookfusion.com
- Calibre API key
- The Calibre plugin requires an account-generated BookFusion API key and configurable sync-thread count.Read 14 Oct 2026 · docs.bookfusion.com
- Calibre integration
- A Calibre plugin synchronizes books, metadata, tags, series and incremental PDF or EPUB updates to BookFusion devices.Read 14 Oct 2026 · bookfusion.com
- Calibre integration limit
- Calibre synchronization currently runs only from Calibre to BookFusion; custom columns and automatic virtual-shelf assignment are planned.Read 14 Oct 2026 · docs.bookfusion.com
- Company headquarters and size
- Crunchbase lists New York, United States as headquarters and a 1–10 employee range.Read 14 Oct 2026 · crunchbase.com
- Company legal name
- Crunchbase lists the legal name as BookFusion Inc and operating status as active.Read 14 Oct 2026 · crunchbase.com
- Content ownership
- Terms state that users retain ownership of uploaded ebooks, documents and files while granting permissions needed to operate the service.Read 14 Oct 2026 · bookfusion.com
- Cross-device sync
- Reading progress, bookmarks, highlights, annotations and ebook files can synchronize across devices.Read 14 Oct 2026 · bookfusion.com
- Desktop availability
- The January 2026 roadmap says a Qt native desktop app for Windows, Linux and macOS was in development, with Windows beta limited to some educational institutions.Read 14 Oct 2026 · blog.bookfusion.com
- Developer roadmap
- A January 2, 2026 product post says BookFusion added loan and borrow API capabilities and is building a full developer portal for third-party apps.Read 14 Oct 2026 · blog.bookfusion.com
- Digital store
- The reading page says its store offers over 70,000 free eBooks as well as titles for purchase.Read 8 Oct 2026 · bookfusion.com
- Documentation and support
- Documentation covers introductions, reading, text-to-speech, smart shelves and Calibre, while support is delivered through a Zendesk help center with email contact.Read 14 Oct 2026 · support.bookfusion.com
- EPUB 3
- The reader supports interactive EPUB 3 content such as audio, video, questions and games.Read 14 Oct 2026 · play.google.com
- Feature status
- The reading page labels its social reading experience as beta, discovery as coming soon, and lending and borrowing as upcoming.Read 8 Oct 2026 · bookfusion.com
- Formats
- The reader supports major eBook formats including PDF, MOBI, and EPUB.Read 8 Oct 2026 · bookfusion.com
- Founder and funding
- Crunchbase names Dwayne Campbell as founder and CEO and lists one pre-seed funding round without publicly showing its amount.Read 14 Oct 2026 · crunchbase.com
- Google Play account requirement
- The Android listing says an account is required for synchronization and related functions, advising users not to install if they do not want an account.Read 14 Oct 2026 · play.google.com
- Highlights and export
- Highlights support colors and tags and can be sorted and exported as CSV, Markdown, HTML or PDF.Read 14 Oct 2026 · apps.apple.com
- KOReader integration
- The BookFusion KOReader plugin can browse the BookFusion library, download books, and sync reading position and highlights.Read 8 Oct 2026 · docs.bookfusion.com
- Limit: cloud controls
- An Apple reviewer complained that books could not be individually excluded from cloud upload, making storage management harder.Read 14 Oct 2026 · apps.apple.com
- Limit: subscription model
- An Apple reviewer says the recurring subscription becomes expensive and would prefer a one-time purchase.Read 14 Oct 2026 · apps.apple.com
- Limit: text to speech
- An Apple reviewer reported that AI narration repeatedly stopped at certain pages and required skipping ahead.Read 14 Oct 2026 · apps.apple.com
- LinkedIn presence
- BookFusion's LinkedIn page showed 822 followers when accessed.Read 14 Oct 2026 · linkedin.com
- Notable news: 2026 roadmap
- On January 2, 2026, BookFusion reported 2025 improvements including PDF pagination, realistic-voice infrastructure, smart shelves and planned article support.Read 14 Oct 2026 · blog.bookfusion.com
- Offline reading
- Books can be downloaded for offline reading after being stored in the cloud.Read 14 Oct 2026 · bookfusion.com
- Organization
- Libraries can be organized with virtual bookshelves, series, tags, categories, authors and editable metadata.Read 14 Oct 2026 · bookfusion.com
- Praise: Calibre and syncing
- Apple reviewers repeatedly praise the Calibre integration, reliable cross-device synchronization, customization and active developer responses.Read 14 Oct 2026 · apps.apple.com
- Privacy practices
- The privacy policy says BookFusion collects account, billing, uploaded-content, location and reading-activity data, uses SSL for sensitive transmission and does not sell personal information.Read 14 Oct 2026 · bookfusion.com
- Rating on Apple App Store
- 4.7 out of 5 from 498 ratings.Read 14 Oct 2026 · apps.apple.com
- Rating on Google Play
- 4.1 out of 5 from 1.02K reviews.Read 14 Oct 2026 · play.google.com
- Reading sync
- Bookmarks, comments, highlights, and reading progress sync across devices.Read 8 Oct 2026 · bookfusion.com
- Send to Kindle
- Users can send ebooks to Kindle, with the free tier limited to two ebooks per month and paid tiers listed as unlimited.Read 14 Oct 2026 · bookfusion.com
- Smart shelves
- Smart Queries and Smart Shelves create rule-based searches and automatically updating shelves.Read 14 Oct 2026 · docs.bookfusion.com
- Supported reading formats
- The apps read EPUB, PDF and CBZ/CBR directly, while web uploads additionally support formats including AZW, AZW3, DJVU, DOCX, FB2, HTML, LRF, MOBI, RTF and TXT.Read 14 Oct 2026 · play.google.com
- Text to speech
- Web reading supports browser or operating-system voices and streaming realistic voices for eligible plans.Read 14 Oct 2026 · docs.bookfusion.com
- Upload restriction
- Personal eBook uploads must be DRM-free, and the pricing page lists storage and maximum file-size limits by plan.Read 8 Oct 2026 · bookfusion.com
Plans and prices
Free Free 10 books · 15 MB max file · 3 virtual bookshelves · 2 Send to Kindle eBooks/month · 3 devices · 1 concurrent loan Read 14 Oct 2026 · bookfusion.com
Casual $2.99 a month monthly 5 GB storage · 100 MB max file · unlimited shelves · unlimited Send to Kindle · unlimited devices · 1 concurrent loan Read 14 Oct 2026 · bookfusion.com
Advanced $7.99 a month monthly 20 GB storage · 1 GB max file · family sharing for 2 · 2 concurrent loans Read 14 Oct 2026 · bookfusion.com
Power $14.99 a month monthly 100 GB storage · 4 GB max file · family sharing for 5 · 5 concurrent loans · prioritized feature requests Read 14 Oct 2026 · bookfusion.com
Starter $199 a month monthly Up to 50 members · 500 eBooks/documents · iOS and Android readers · 15-day trial Read 14 Oct 2026 · bookfusion.com
Premium $399 a month monthly Up to 150 members · 2,000 eBooks/documents · iOS, Android and web readers · 15-day trial Read 14 Oct 2026 · bookfusion.com
Plus $599 a month monthly Up to 500 members · 5,000 eBooks/documents · dedicated library URL · 15-day trial Read 14 Oct 2026 · bookfusion.com
Enterprise Priced on request Unlimited books and space · premium support · customer success manager · branded apps · dedicated library URL Read 14 Oct 2026 · bookfusion.com
Strong points and limits
Strong points
- Syncs bookmarks, comments, highlights and progress
- Supports offline reading
- Calibre and KOReader plugins are available
- Store offers over 70,000 free eBooks
Limits
- Personal uploads must be DRM-free
- Free plan allows 10 books
- Free plan maximum file size is 15 MB
- Social reading is labeled beta
Who it suits
BookFusion suits readers who want an eBook library synchronized across devices, including offline reading and organization tools. Calibre and KOReader users can use its listed plugins, subject to the stated Calibre version requirement.
BookFusion in depth
Read the full write-up
Overview
BookFusion combines an eBook library with reading and syncing across web, iOS, and Android. It suits readers who want a managed personal collection, particularly Calibre or KOReader users. Its strongest case is the mix of organization, offline reading, and integration; DRM-free uploads and low entry-tier caps narrow its appeal.
Key features
BookFusion reads PDF, MOBI, and EPUB, and syncs bookmarks, comments, highlights, and reading progress across devices. That continuity helps readers move between screens without losing their place or annotations. Downloaded books work offline, though personal uploads must be DRM-free—a meaningful constraint for collections that include protected files.
Collections can be organized by author, genre, and custom tags, with rule-based Smart Shelves and Smart Queries for more structured sorting. Calibre’s official plugin syncs books and metadata using an API key and requires Calibre 5.0 or later. The KOReader plugin can browse the library, download books, and sync reading position and highlights. These integrations make BookFusion a stronger option for readers already using either tool than for someone seeking only a standalone reader.
The store offers over 70,000 free eBooks as well as titles for purchase. Social reading is in beta; discovery is coming soon, and lending and borrowing are upcoming. Those future-facing features should not drive a purchase decision today.
Pricing
The Free plan costs nothing and allows 10 books, 15 MB maximum file size, three virtual bookshelves, two Send to Kindle eBooks per month, three devices, and one concurrent loan per book. It is a useful way to try the service, but the book and file caps make it a poor home for a growing library.
Casual costs $1.99 a month, billed Yearly, with “Save 20%” shown. It raises the limits to 5 GB storage and 100 MB per file, and adds unlimited bookshelves and devices; one concurrent loan per book remains. It fits a modest personal collection, but larger files or libraries call for a higher tier.
Advanced costs $4.99 a month, billed Yearly, with “Save 20%” shown. It provides 20 GB storage, a 1 GB maximum file size, two family sharing members, and two concurrent loans per book. That is the more practical choice for readers sharing a library or storing larger files. Power costs $9.99 a month, billed Yearly, with “Save 20%” shown; its 100 GB storage, 4 GB file cap, five family sharing members, and five concurrent loans per book suit larger collections and households. Advanced and Power include priority email support; reader plans list email support.
For organizations, Starter costs $199 a month for up to 50 members and 500 eBooks or documents, with iOS and Android readers. Premium costs $399 a month for up to 150 members and 2,000 items, adding web readers. Plus costs $599 a month for up to 500 members and 5,000 items, plus a dedicated library URL. Each offers a free 15-day trial. Enterprise has custom pricing and includes unlimited books and space, premium support, a customer success manager, and branded apps. The business tiers make more sense for institutions or organizations than for individual readers.
Platforms
BookFusion supports web, iOS, and Android. The API is also listed as a platform. Calibre integration requires version 5.0 or later; the KOReader plugin extends library browsing, downloads, and reading sync to that reader.
Who it's for
BookFusion is best for readers who want an organized, cross-device library with offline access, or who already rely on Calibre or KOReader. Casual and higher plans are a better fit than Free for collections that exceed ten books or contain files above 15 MB. Readers whose books are DRM-protected should look elsewhere for personal uploads, while organizations can consider the member-based business plans and Enterprise option.
Pros and cons
Pro: Syncs progress, bookmarks, comments, and highlights across devices, making a multi-screen reading routine more coherent.
Pro: Calibre and KOReader integrations connect library management and reading workflows instead of leaving them isolated.
Pro: Offline downloads and organization tools support both reading away from a connection and maintaining a structured collection.
Con: Personal uploads must be DRM-free, excluding protected eBooks from a personal library.
Con: Free allows just 10 books and a 15 MB maximum file size, so many readers will need to upgrade early.
Con: Social reading remains beta, while discovery and lending or borrowing are not yet current features.
Alternatives
Readest is worth considering for readers who want open-source software under the AGPL-3.0 license, broader desktop platform support, or a 5 GB cloud-sync option at $4.99 a month.
Libby is a better fit for borrowing digital content through a library card, with no subscription cost or in-app purchases.
Bluefire Reader is another eBook reader option.
FBReader offers a free tier and supports Linux as well as mobile and desktop platforms, but its current code is closed source.
Adobe Digital Editions is a free alternative for supported desktop and mobile platforms.
MapleRead is an iOS-only option with a one-time 6.99 USD CE purchase; choose it if a one-time price matters more than cross-platform access.
ReadEra offers free reading without ads or registration on Android, iOS, and macOS; its Premium plan is a one-time 14.99 USD.
Calibre-Web is a free, self-hosted option for readers who want to use a Calibre database.
Browse more options in Ebook Reader Software and Reading Apps.
Verdict
Choose BookFusion if you want a cross-device library with offline reading and useful Calibre or KOReader integration, and your personal files are DRM-free. Its storage and file-size tiers give growing collections room to scale, but strict free limits and features still in beta or planned make it a less compelling choice for readers who need a generous free library or established social and discovery tools.
Verdict
BookFusion brings library organization, reading and cross-device sync together, with offline access and integrations for Calibre and KOReader. Check the plan’s storage and file-size limits, and note that some listed social and discovery features are not fully available.
Where Specifiction places it
- Reading Apps#1 of 479.4
- Ebook Reader Software#1 of 279.4
