Cool Reader

In-app purchases
3.9
264K reviews
10M+
Downloads
Content rating
Everyone
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About this app

eBook reader. Supports epub (non-DRM), fb2, doc, txt, rtf, html, chm, tcr, pdb, prc, mobi (non-DRM), pml formats.

Pages or scroll view. Page flipping animation.
Table of contents, bookmarks, text search.
Bookmarks on text fragments (comments or corrections) - useful for proof reading.
Export of bookmarks to text file.
Built-in file browser, quick recent books access.
Online catalogs (OPDS) support.
LitRes online book store support.
Text to Speech (TTS) support.
Hyphenation dictionaries;
Most complete FB2 format support: styles, tables, footnotes.
Additional fonts support (place .ttf to /sdcard/fonts/)
Support for Chinese, Japanese, Korean languages; autodetection of TXT file encoding (GBK, Shift_JIS, BIG5, EUC_KR).
Day and night profiles (two sets of colors, background, backlight levels).
Brightness adjustments by flick on left edge of screen.
Background texture (stretched or tiled) or solid color.
Paperbook-like page turning animation or "sliding page" animation.
Dictionary support (ColorDict, GoldenDict, Fora Dictionary, Aard Dictionary).
Customizable tap zone and key actions.
Autoscroll (automatic page flipping) - start using menu/goto/autoscroll or assign action Autoscroll on key or tap zone; Change speed using volume keys or bottom-right and bottom-left tap zones; stop - tap any other tap zone or key.
Can read books from zip archives.
Automatic reformatting of .txt files (autodetect headings etc.)
Styles can be customised in wide range using external CSS.
Select text using double tap (optional).

Place additional textures to /sdcard/.cr3/textures/ -- to be used as tiled page backgrounds.
Place additional textures to /sdcard/.cr3/backgrounds/ -- to be used as stretched page backgrounds.
(/cr3/ directory can also be used instead of /.cr3/, and internal SD or internal storage instead of /sdcard/)

CoolReader requires following permissions:
WAKE_LOCK - to control screen backlight
WRITE_EXTERNAL_STORAGE - to access SD card
INTERNET - to use online catalogs

CoolReader is free, open source (GPL), multiplatform project.
Project homepage on SourceForge is http://sourceforge.net/projects/crengine/
To donate this project, you can buy Cool Reader Gold ($10), Silver ($3) or Bronze ($1) Donation package from Market

In case of issues after update (e.g. crashes while reading) try to remove directory SD/.cr3/cache and book database files SD/.cr3/*.sqlite

Windows version can be downloaded here:
http://sourceforge.net/projects/crengine/files/CoolReader3/cr3-newui-opengl/cr3-win32-qt-opengl-3.3.48.zip/download

As well, consider using "Cool Reader GL" - cross-platform Cool Reader version with UI rewritten in C++, with hardware acceleration based on OpenGL. Optimized for new devices with big high resolution screens. Both versions can be installed together.

Project homepage: https://github.com/buggins/coolreader
Updated on
Mar 9, 2021

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No information available
3.9
264K reviews
A Google user
May 6, 2019
Cool Reader allows more customizations than have ever seen in a ePub reader. Plus, it has a soothing background, parchment paper, that is much easier on the eyes than just a color would be. Finally, it has a scrolling mode that lets you go down through the book or document with out having to flip pages, which is ideal for one of my uses. The only reason it doesn't get 5 stars, is that it changes bold to Comic Sans. I wish this were an option that could be disabled. It is harder to read.
33 people found this review helpful
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K.M. Angelwood
September 14, 2020
I've used this for couple of years on other devices with no problems. I recently upgraded to a Galaxy Note 20 and ran into issues. Whenever I launch the app, it crashes. I have to restart it multiple times before it will finally open a book. It also seems to change the formatting or text size, because even though I stopped reading at the bottom of a page, the next time I opened the app, the last thing I read seems to be a paragraph or two from the top. It's still usuable, just annoying now.
15 people found this review helpful
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A Google user
January 12, 2019
I have been using Cool Reader for several years and its my favorite ereader. It`s one of the first apps I add when I get a new android device and it is my favorite one for reading books because I can set it up with the wood background. I also really like the bookmark/highlight feature. However, no piece of software is perfect... my newest tablet, the wood background is tinted blue, but only when I try to read in landscape mode... turn the tablet 90 degrees and it is normal colored.
23 people found this review helpful
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What's new

Text-to-speech improvements.
Cloud synchronization fixes.
Stability fixes.
Onyx e-ink readers support.