Koodo Reader v2.1.3: A Free and Boundless Cross-Platform Reading Experience

"When the reader disappears, reading truly begins."

Free, lightweight, boundaryless—Koodo Reader is designed for users who seek a pure reading experience. It supports all platforms including Windows/macOS/Linux/Android/iOS/webpage, and its open-source protocol ensures data sovereignty (project address), bringing reading back to its essence.

Core Features · One Image, One Function

📖 Immersive Reading Interface

Minimalist design eliminates visual distractions, allowing you to focus solely on the text. Supports switching freely between single-page, double-page, and scroll modes, adapting to different reading scenarios.

Koodo Reader Main Interface: Clear Bookshelf Layout and Book Classification Management

Figure: Distraction-free bookshelf view with intelligent classification by format/tags

🎨 Customizable Themes and Typography

Five themes are available for selection, ranging from classic amber yellow to eye-friendly soft green, combined with over 30 typography parameters (font, line spacing, letter spacing) to create your own personalized reading aesthetics.

Koodo Reader Amber Yellow Theme Reading Interface: Warm Tone and Fine Text Rendering

Figure: The amber yellow theme creates a paper-like feel, with smooth, jagged-free text edges

⚙️ Deep Customization System

From font weight to paragraph spacing, from text shadows to background brightness, every typographic detail can be finely adjusted to meet the needs of professional readers.

Koodo Reader Reading Settings Panel: Triple Adjustment System for Font/Spacing/Color

Figure: The typography settings panel intuitively displays text rendering parameters

🌓 Seamless Mode Switching Experience

Single-page focused reading, dual-page comparison, and scroll browsing—three reading modes can be switched with one click, suitable for novels, comics, academic papers, and other content types.

Koodo Reader Dual-Page Mode Reading Interface: Symmetrical Layout and Natural Page Turning Effect

Figure: Dual-page mode simulates the layout of physical books, retaining chapter start page designs

📌 Efficient Bookshelf Management

Right-click menus integrate batch operations, supporting quick tagging, organizing bookshelves, and managing local/cloud storage books.

Koodo Reader Bookshelf Right-Click Menu: Batch Operation and Cloud Storage Management Options

Figure: Right-click menu provides efficient operations such as "Add to Favorites" and "Export Notes"

🌙 Professional-Level Night Mode

Independently adjust screen brightness and text contrast, paired with a dark theme to achieve true eye protection during reading.

Koodo Reader Night Mode Settings: Precise Control Over Brightness/Contrast/Text Color

Figure: Night mode parameter adjustment panel avoids the discomfort caused by ordinary dark mode

Why Readers Love Koodo?

✅ Truly Open Source: AGPL-v3.0 license ensures complete transparency.
✅ No Data Lock-in: Your books and notes are always stored in the location you specify (local/cloud/WebDAV).
✅ Cross-Platform Freedom: Full support for Windows 7+/macOS 10.11+/Linux, including ARM architecture devices.

Koodo Reader v2.1.3 [September 1, 2025] Release Notes

New Features

AI Ask Book UI details optimized.
After enabling first-line indentation, automatically override existing paragraph indentation, while headings no longer receive indentation.
Added CORS detection when testing webpage connections.
Added email format validation.
Added an extra confirmation step before hiding the menu button.
(Mobile version) Optimized list performance when the library contains many books, notes, and highlights.
(Mobile version) Improved speed when opening large volume txt files.
(Mobile version) Enhanced smoothness of simulated page-turning animations.
(Mobile version) Added options to go to update and stop reminding when Webview version is too low.
(Mobile version) Optimized login page UI details.
(Mobile version) Increased the threshold for using the native PDF reader to 0MB; once selected, it will always use the native PDF reader.
(Mobile version) After enabling first-line indentation, automatically override existing paragraph indentation, while headings no longer receive indentation.
(Mobile version) Added email format validation.

Fixes

Fixed issue where some footnotes in books were not displayed.
Fixed issue causing blank pages after some stable version users upgraded.
Fixed issue where images in some books were not displayed.
Fixed issue of repeated highlighting and underlining of text.
Fixed issue where search unexpectedly exited after entering full-screen mode on macOS.
Fixed issue where the in-app chat button sometimes did not appear.
Fixed issue causing lag when opening books after high-lighting notes exceeded a certain number.
Fixed issue where the book list did not refresh after changing storage locations or switching libraries.
Fixed issue where pop-up windows appeared beyond book boundaries when selecting text.
(Mobile version) Fixed issue where notes pop-ups and floating buttons appeared simultaneously after tapping highlights.
(Mobile version) Fixed issue where notes pop-ups appeared when swiping up on highlights in scroll mode.
(Mobile version) Fixed issue where bookshelf UI became abnormal after switching between night and day modes.
(Mobile version) Fixed issue causing lag when flipping pages backward after enabling simulated page-turning animations.
(Mobile version) Fixed issue causing lag when opening books after high-lighting notes exceeded a certain number.
Fixed issue where images in some books were not displayed.

Download Guide

To provide you with the most convenient experience, we have gathered all available download methods on a single page. Visit the link below, and choose your preferred download channel based on your personal network environment and preferences, while selecting the appropriate version according to your device type (all versions are updated synchronously).

I. Download Sources Available on the Page

High-speed direct link from our site: Enjoy fast and stable downloads via Cloudflare R2 (recommended as the priority choice).
Public cloud mirror: Supports分流 (splitting) through Baidu Netdisk, Alibaba Cloud Drive, 123 Cloud Disk, Tianyi Cloud Disk, Thunder Network Disk, Google Drive, OneDrive, making it easy to save files.

II. File Version Selection Instructions (Must Read)

Please select the installation package according to your device type to avoid downloading incorrect versions:

1. Android Devices (Phone/Tablet)

File: Koodo-Reader-2.1.3-arm64.apk (39.56 MB)
Description: The .apk suffix indicates an Android-specific installation package, suitable for all mainstream Android devices (current Android phones/tablets use ARM64 architecture, fully compatible).
Recommendation: Android users should directly download this version.

2. Windows Systems (Computer)

[Recommended] Mainstream Choice (95% Users Applicable):
- File: Koodo-Reader-2.1.3-x64.exe
- Description: x64 represents the 64-bit architecture, suitable for all modern Windows computers (including Windows 10/11 64-bit systems), and is the best choice for general users.
[Not Recommended] Special Device-Specific (Do Not Download Unless Necessary):
- Koodo-Reader-2.1.3-ia32.exe:
  - Description: ia32 represents the 32-bit architecture, only applicable to older Windows systems (such as Windows 7 32-bit, Windows XP), not necessary for modern computers.
  - Reminder: Users unsure whether their computer is 32-bit should absolutely not download this version!
- `Koodo-Reader-2.1.3-arm64.exe:
  - Description: arm64 represents the ARM architecture, only for Windows on ARM devices (such as Microsoft Surface Pro X and other rare devices), which ordinary users do not need to consider.

III. Important Information

Version Updates: This site automatically checks for version updates every half hour; the download page always remains up-to-date, and all mirror content are synchronized with updates.
File Verification: Please verify file integrity using the SHA-256 hash value provided on the page.
Fee Information: All channels are completely free of charge.

Download Now

Please visit the download page to select your channel and version:
https://www.yinyuee.com/download/koodo-reader

Note: If you are still unsure about your device type, preferably choose the Android arm64.apk or Windows x64.exe versions, as these two cover 99% of common user needs.