Best Ebook Reader Software in 2026
Updated
In short: Readest is ranked #1 of 27 as of 4 October 2026, ahead of Libby and eBoox. The best-ranked option with a free plan is Libby. The lowest first paid tier on this page is Readest at $4.99/mo.
Choosing an ebook reader means weighing how it handles your books and where you read them. Compare supported formats and library storage with offline reading and reading sync; annotation tools may also matter if you like to mark up a text. Supported platforms, free-plan availability, and paid-from pricing offer further points of comparison. Readest and Libby appear first, followed by eBoox and PocketBook Reader. Adobe Digital Editions and Thorium Reader are also among the early entries. Consider which formats you use and whether you need access across devices or without a connection, then compare those needs with the listed features.
27 ebook reader software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
#1 Readest Top pick · 7.6 Free plan · $4.99/mo
#2 Libby Runner-up · 7.3 Free plan · Free
#3 eBoox Also great · 7.2 Free plan · Free- Free plan AndroidiOSLinuxmacOSWebWindows
- Free plan
- Yes
- Paid from
- 4.99 /mo
- Supported platforms
- web, Windows, macOS, Linux, iOS, Android
- Supported formats
- EPUB, PDF, MOBI, AZW, AZW3, FB2, CBZ, ZIP, TXT, Markdown
- Annotation tools
- Yes
- Reading sync
- Yes
RecognisedDocumentedFree planFree trialPlatforms$4.99/mofirst paid tier About ReadestVisit site - Free plan AndroidiOSmacOSWebWindows
- Free plan
- Yes
- Supported platforms
- web, windows, macos, ios, android
- Supported formats
- EPUB, PDF
- Annotation tools
- Yes
- Reading sync
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan AndroidiOSWeb
- Free plan
- Yes
- Supported platforms
- web, iOS, Android
- Supported formats
- EPUB, FB2, MOBI, PDF, DOC, DOCX, TXT, PRC, RTF, ODT, HTML, AZW, AZW3, CBR, CBZ, ZIP, RAR
- Annotation tools
- Yes
- Reading sync
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan AndroidiOSmacOS
- Free plan
- Yes
- Supported platforms
- iOS, Android, macOS
- Supported formats
- EPUB, PDF, MOBI, AZW3, FB2, DOC, DOCX, RTF, ODT, DJVU, TXT, CHM, CBZ, CBR
- Annotation tools
- Yes
- Reading sync
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan AndroidiOSmacOSWindows
- Free plan
- Yes
- Supported platforms
- Windows, macOS, iOS, Android
- Supported formats
- EPUB, EPUB3, PDF
- Annotation tools
- Yes
- Reading sync
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free trial AndroidiOSWeb
- Free plan
- Yes
RecognisedDocumentedFree planFree trialPlatforms$7.99/mofirst paid tier About Kobo BooksVisit site - Free plan AndroidiOS
- Free plan
- Yes
- Supported platforms
- iOS, Android
- Supported formats
- PDF (Adobe DRM), EPUB (Adobe DRM), DjVu, FB2, FB2.zip, MOBI, DOCX, RTF, TXT, CHM, HTML (Basic), CBZ, CBR, CBT
- Annotation tools
- Yes
- Reading sync
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan iOSLinuxmacOSWindows
- Free plan
- Yes
- Supported platforms
- Windows, macOS, Linux, iOS, iPadOS
- Supported formats
- EPUB 2/3, Fixed Layout EPUB, PDF, DAISY 2.02/3, Web Publications
- Annotation tools
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan Android
- Free plan
- Yes
- Supported platforms
- Android
- Supported formats
- EPUB, PDF, FB2, other book formats
- Annotation tools
- Yes
- Reading sync
- Yes
RecognisedDocumentedFree planFree trialPlatforms - WindowsmacOSLinuxiOSAndroid
- Free plan
- Yes
- Supported platforms
- Windows, macOS, Linux, iOS, Android
- Supported formats
- EPUB, PDF
- Annotation tools
- Yes
RecognisedDocumentedFree planFree trialPlatforms - WebWindowsmacOSLinux
- Free plan
- Yes
- Supported platforms
- web, Windows, macOS, Linux, self-hosted
- Supported formats
- TXT, PDF, EPUB, KEPUB, CBZ, CBT, CBR, DJVU, DJV
- Reading sync
- Yes
RecognisedDocumentedFree planFree trialPlatforms - WebWindowsmacOSiOSAndroid
- Free plan
- No
- Supported platforms
- iOS, Android, Windows, macOS
- Supported formats
- EPUB2, EPUB3, PDF
- Annotation tools
- Yes
- Reading sync
- Yes
RecognisedDocumentedFree planFree trialPlatforms - AndroidLinuxmacOS
- Free plan
- Yes
- Supported platforms
- Kindle, Kobo, PocketBook, Android, desktop Linux; macOS emulator
- Supported formats
- EPUB, PDF, DjVu, XPS, CBT, CBZ, FB2, PDB, TXT, HTML, RTF, CHM, DOC, MOBI, ZIP
- Annotation tools
- Yes
- Reading sync
- Yes
RecognisedDocumentedFree planFree trialPlatforms - iOSmacOS
- Free plan
- Yes
- Supported platforms
- iOS, macOS
- Supported formats
- EPUB (DRM-free), PDF (DRM-free), MOBI, AZW3, DjVu, FB2, FB2.ZIP, CBR, CBZ, CBT, MP3, M4A, M4B, TXT, RTF
- Annotation tools
- Yes
- Reading sync
- Yes
RecognisedDocumentedFree planFree trialPlatforms - WebAndroid
- Free plan
- Yes
- Supported platforms
- Android, web
- Supported formats
- PDF, EPUB, EPUB3, MOBI, DjVu, FB2, FB2.ZIP, TXT, RTF, AZW, AZW3, HTML, CBZ, CBR, DOC, DOCX, ODT, XPS, TIFF, PDB, MHT
- Annotation tools
- Yes
- Reading sync
- Yes
RecognisedDocumentedFree planFree trialPlatforms - iOSmacOS
- Free plan
- Yes
- Supported platforms
- iOS, macOS
- Supported formats
- EPUB, MOBI, Kindle AZW/AZW3/KF8, CBZ, CBR, PDF
- Annotation tools
- Yes
- Reading sync
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Linux
- Free plan
- Yes
- Supported platforms
- linux
- Supported formats
- EPUB, Mobipocket, Kindle, FB2, CBZ, PDF
- Annotation tools
- Yes
- Reading sync
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Android
- Free plan
- Yes
- Supported platforms
- Android
- Supported formats
- EPUB, PDF, DJVU, AZW3, MOBI, FB2, PRC, CHM, CBZ, CBR, UMD, DOCX, ODT, RTF, TXT, HTML, MHT/MHTML, MD (MarkDown), WEBP, RAR, ZIP, OPDS
- Annotation tools
- Yes
- Reading sync
- Yes
RecognisedDocumentedFree planFree trialPlatforms - WebiOSAndroid
- Free plan
- Yes
- Paid from
- 1.99 /mo
RecognisedDocumentedFree planFree trialPlatforms - Linux
- Free plan
- Yes
- Supported platforms
- linux
- Supported formats
- EPUB, PDF, MOBI, FB2, CBR, CBZ
- Annotation tools
- Yes
RecognisedDocumentedFree planFree trialPlatforms - WindowsmacOSLinuxiOSAndroid
- Free plan
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Linux
- Free plan
- Yes
- Supported platforms
- Linux
- Supported formats
- CBZ, CBR, CBT, EPUB, PDF
RecognisedDocumentedFree planFree trialPlatforms - WindowsmacOS
- Free plan
- Yes
RecognisedDocumentedFree planFree trialPlatforms - iOS
- Free plan
- No
- Supported platforms
- iOS
- Supported formats
- EPUB, PDF
- Annotation tools
- Yes
- Reading sync
- Yes
RecognisedDocumentedFree planFree trialPlatforms - LinuxmacOSself-hostedWebWindows
- Supported platforms
- web, self_hosted
- Supported formats
- EPUB, PDF, MOBI, AZW3, TXT
RecognisedDocumentedFree planFree trialPlatforms
Is your platform on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which ebook reader software is ranked first on The Geeks Club?
Readest is ranked #1 of 27 with a score of 7.6. Libby is second and eBoox third.
How many of these have a free plan?
8 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Readest has the lowest first paid tier we found: $4.99/mo.
How is this list ranked?
Ranked on how quickly a newcomer can get going: documentation depth, a free tier or trial, and the platforms it runs on. Paid placements never change a rank.