Readest: EPUB & PDF Reader
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1.33K reviews
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100K+
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About this app
Readest is a modern, open-source ebook reader for people who read a lot, and want their books, notes and progress to follow them everywhere.
Open EPUB, PDF, MOBI, AZW3, FB2, CBZ, TXT and Markdown, and tune the reading experience down to the last detail.
Read your way
• Paginated or scrolling modes with smooth page-turn animations
• Custom fonts, themes, spacing, margins and columns
• Vertical text for CJK books
• Built for e-ink, with contrast tuned for slow-refresh screens
• Open up to four books side by side for research and comparison
Your whole library
• Browse and download from OPDS catalogs and public libraries
• Connect to Calibre and Calibre-Web, covers and metadata included
• Organize with custom bookshelf groups
• Full-text search inside a book
Notes that last
• Highlights, bookmarks and structured notes
• Copy a highlight together with a deep link back to the passage
• Export your annotations
Listen and understand
• Text-to-speech with downloadable offline voices and Android Auto support
• Translate a sentence, a page, or an entire book
• Wikipedia and dictionary lookup without leaving the page
Sync everywhere
• Readest Cloud, or bring your own: Google Drive, OneDrive, WebDAV, S3
• KOReader sync keeps your progress in step with your e-reader
• Android, iOS, macOS, Windows, Linux and the web
Readest is open source. Questions or ideas: support@readest.com
Privacy policy: https://readest.com/privacy-policy
Open EPUB, PDF, MOBI, AZW3, FB2, CBZ, TXT and Markdown, and tune the reading experience down to the last detail.
Read your way
• Paginated or scrolling modes with smooth page-turn animations
• Custom fonts, themes, spacing, margins and columns
• Vertical text for CJK books
• Built for e-ink, with contrast tuned for slow-refresh screens
• Open up to four books side by side for research and comparison
Your whole library
• Browse and download from OPDS catalogs and public libraries
• Connect to Calibre and Calibre-Web, covers and metadata included
• Organize with custom bookshelf groups
• Full-text search inside a book
Notes that last
• Highlights, bookmarks and structured notes
• Copy a highlight together with a deep link back to the passage
• Export your annotations
Listen and understand
• Text-to-speech with downloadable offline voices and Android Auto support
• Translate a sentence, a page, or an entire book
• Wikipedia and dictionary lookup without leaving the page
Sync everywhere
• Readest Cloud, or bring your own: Google Drive, OneDrive, WebDAV, S3
• KOReader sync keeps your progress in step with your e-reader
• Android, iOS, macOS, Windows, Linux and the web
Readest is open source. Questions or ideas: support@readest.com
Privacy policy: https://readest.com/privacy-policy
Read EPUB, PDF & more. Sync, annotate, translate and listen on every device.
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Ratings and reviews
1.14K reviews
Adam G.
- Flag inappropriate
September 8, 2026
I've used a LOT of reading applications over the years and am pretty annoyingly picky about them. I want them to be both frictionless to open and start reading, while also being feature rich and cross platform. This is my all time favorite reading app by a wide margin. KOreader sync support, mobile apps across platforms (and the web!) to sync your library and reading location, OPDS support, audiobookshelf support, the ability to sync notes and highlights to notion... Incredible stuff.
2 people found this review helpful
Eli Smith
- Flag inappropriate
September 2, 2026
I haven't been using this app for very long (trying to move away from google books), but I'm really enjoying that I can add tags to books and that I can see the series. the only thing I wish I could do (so far) is adding tags to multiple books at a time because that would be a massive time saver (I have over 1,000 epubs saved to my phone)
4 people found this review helpful
Readest
September 2, 2026
Thanks for the feedback. We will support this in upcoming updates.
Ben Parisi
- Flag inappropriate
June 14, 2026
It improves with every update, but it is really fantastic. The plug in works perfectly, lifetime subscription for not much if you want it, or free use for tons of epubs. Just reading in the app itself is excellent on eink devices on android. All the options I could want. Only change I would ask for is being able to tap the progress bar at the bottom and be able to cycle through all the options instead of doing it in the menu. great work guys.
15 people found this review helpful
What’s new
• Library: You can now organize books into configurable bookshelves, tag books in bulk
• Audiobooks: You can download Audiobookshelf books for offline listening, stream audiobooks from OPDS catalogs and BookOrbit
• Reading: You can now open HTML files as books, and select, highlight, and look up text in Paragraph Mode
• Sync: Reading progress refreshes when you return to the app, WebDAV sync is more reliable, and Readwise exports now include bookmarks
• TTS: You can now br...
• Audiobooks: You can download Audiobookshelf books for offline listening, stream audiobooks from OPDS catalogs and BookOrbit
• Reading: You can now open HTML files as books, and select, highlight, and look up text in Paragraph Mode
• Sync: Reading progress refreshes when you return to the app, WebDAV sync is more reliable, and Readwise exports now include bookmarks
• TTS: You can now br...
Everyone
Learn moreApp support
About the developer
Bilingify LLC
support@readest.com
30 N Gould St Ste R
Sheridan, WY 82801-6317
United States
+86 186 0106 4640
