KOReader vs eBoox

KOReader8.6Visit eBoox8.5Visit

Higher score KOReader #6 in Ebook Reader Software 8.6/10 Free plan Free plan✓ 2 of 3 features Visit KOReader

vs

eBoox #7 in Ebook Reader Software 8.5/10 Free plan Free plan✓ 3 of 3 features Visit eBoox

• KOReader fits best

  Open-source readers using ereaders and Calibre

• eBoox fits best

  Readers needing maximum format flexibility

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Side by side

Feature	KOReader 8.6/10 Visit ↗	eBoox 8.5/10 Visit ↗
At a glance
Editor score	8.6	8.5
Ranking	#6 in Ebook Reader Software	#7 in Ebook Reader Software
Best for	Open-source readers using ereaders and Calibre	Readers needing maximum format flexibility
Pricing model	Free	Free plan + paid
Starting price	Free plan	Free plan
Free plan	✓	✓
Free trial	—	—
Deployment	Self-hosted, Desktop, Mobile	Cloud, Mobile
Platforms	Linux, macOS, Android	Web, iOS, Android
Support	Community, Docs	Email, Community
Integrations	4 integrations	5 integrations
Built for	Solo	Solo, Small business
Features KOReader 2/3 · eBoox 3/3
Annotation tools	✓	✓
Reading sync	✓	✓
Offline reading	Not checked yet	✓ (best)
Specs
Supported platforms	Kindle, Kobo, PocketBook, Android, desktop Linux; macOS emulator	web, iOS, Android
Supported formats	EPUB, PDF, DjVu, XPS, CBT, CBZ, FB2, PDB, TXT, HTML, RTF, CHM, DOC, MOBI, ZIP	EPUB, FB2, MOBI, PDF, DOC, DOCX, TXT, PRC, RTF, ODT, HTML, AZW, AZW3, CBR, CBZ, ZIP, RAR
Library storage	Not checked yet	Not checked yet
Our review
Pros	Opens ebook and fixed-page formats including EPUB, PDF, DjVu, and MOBI Calibre tools cover metadata search, wireless transfers, and OPDS browsing Custom typography, bookmarks, highlights, and PDF controls support varied reading	Supports EPUB, FB2, MOBI, PDF, DOCX, AZW3, comic archives, and more Reads offline and synchronizes ebooks and reading progress Imports books from storage, browsers, email, cloud services, and AirDrop
Cons	Progress Sync works between KOReader devices, and each needs its own document copy The wiki says note-taking is not supported macOS is listed via emulator rather than as a native platform	Desktop access is browser-based rather than through a native desktop app Does not include AI features Cloud support centers on iCloud, Google Drive, Dropbox, Yandex.Disk, and AirDrop
Our verdict	KOReader is a free, open-source document reader aimed primarily at E Ink devices, with versions for supported ereaders, Android, and desktop Linux. It suits readers who want control over typography and a broad choice of ebook and… Read the review →	eBoox is an ebook reader for Android, iOS, and the web, aimed at individual readers with libraries spread across different file types and devices. It handles EPUB, FB2, MOBI, PDF, DOC, DOCX, TXT, PRC, RTF, ODT, HTML, AZW, AZW3, CBR, CBZ,… Read the review →

Strengths and trade-offs

• KOReader — where it wins

  • Opens ebook and fixed-page formats including EPUB, PDF, DjVu, and MOBI
  • Calibre tools cover metadata search, wireless transfers, and OPDS browsing
  • Custom typography, bookmarks, highlights, and PDF controls support varied reading

  Where it doesn't

  • Progress Sync works between KOReader devices, and each needs its own document copy
  • The wiki says note-taking is not supported
  • macOS is listed via emulator rather than as a native platform

• eBoox — where it wins

  • Supports EPUB, FB2, MOBI, PDF, DOCX, AZW3, comic archives, and more
  • Reads offline and synchronizes ebooks and reading progress
  • Imports books from storage, browsers, email, cloud services, and AirDrop

  Where it doesn't

  • Desktop access is browser-based rather than through a native desktop app
  • Does not include AI features
  • Cloud support centers on iCloud, Google Drive, Dropbox, Yandex.Disk, and AirDrop

• KOReader8.6/10 · Free plan

  A free, open-source reader with broad format support and deep Calibre integration.

  Visit KOReaderFull verdict →
• eBoox8.5/10 · Free plan

  A flexible free reader for people who move across ebook, document, and comic formats.

  Visit eBooxFull verdict →