KOReader vs Yomu EBook Reader

KOReader8.6Visit Yomu EBook Reader8.4Visit

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

vs

Yomu EBook Reader #8 in Ebook Reader Software 8.4/10 Free plan Free plan✓ 3 of 3 features Visit Yomu

• KOReader fits best

  Open-source readers using ereaders and Calibre

• Yomu EBook Reader fits best

  Apple readers who export annotations

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Side by side

Feature	KOReader 8.6/10 Visit ↗	Yomu EBook Reader 8.4/10 Visit ↗
At a glance
Editor score	8.6	8.4
Ranking	#6 in Ebook Reader Software	#8 in Ebook Reader Software
Best for	Open-source readers using ereaders and Calibre	Apple readers who export annotations
Pricing model	Free	Free plan + paid
Starting price	Free plan	$7.99 one-time
Free plan	✓	✓
Free trial	—	—
Deployment	Self-hosted, Desktop, Mobile	Desktop, Mobile
Platforms	Linux, macOS, Android	iOS, macOS
Support	Community, Docs	Docs
Integrations	4 integrations	8 integrations
Built for	Solo	Solo, Small business
Features KOReader 2/3 · Yomu EBook Reader 3/3
Annotation tools	✓	✓
Reading sync	✓	✓
Offline reading	Not checked yet	✓ (best)
Specs
Supported platforms	Kindle, Kobo, PocketBook, Android, desktop Linux; macOS emulator	iOS, macOS
Supported formats	EPUB, PDF, DjVu, XPS, CBT, CBZ, FB2, PDB, TXT, HTML, RTF, CHM, DOC, MOBI, ZIP	EPUB, MOBI, Kindle AZW/AZW3/KF8, CBZ, CBR, PDF
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	Reads EPUB, MOBI, Kindle, comic, and PDF files Exports metadata and annotations in text, Markdown, or JSON Supports optional iCloud sync for library, annotations, and reading state
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	Free version is limited to 10 documents and includes ads iOS and macOS only PDF and comic support is primarily viewer-level
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 →	Yomu EBook Reader is a freemium ebook app for iPhone, iPad, and Mac, aimed at people reading DRM-free books. It imports EPUB, MOBI, Kindle, comic, and PDF files, while offering library organization through folders, tags, sorting, and… 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

• Yomu EBook Reader — where it wins

  • Reads EPUB, MOBI, Kindle, comic, and PDF files
  • Exports metadata and annotations in text, Markdown, or JSON
  • Supports optional iCloud sync for library, annotations, and reading state

  Where it doesn't

  • Free version is limited to 10 documents and includes ads
  • iOS and macOS only
  • PDF and comic support is primarily viewer-level

• KOReader8.6/10 · Free plan

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

  Visit KOReaderFull verdict →
• Yomu EBook Reader8.4/10 · Free plan

  A capable Apple-only reader for DRM-free books and exportable annotations.

  Visit YomuFull verdict →