# Chaka Book Reader (open-source reading app)

> Chaka Book Reader is a free, open-source reading app for Android. Committed to improving reading experience. It has 124 GitHub stars and is released under the AGPL-3.0-or-later license, and you can install it from F-Droid.

Read fluently and comfortably, with simple and clear interface. Supported Files: · Documents: PDF, EPUB, DJVU, MOBI, FB2, XPS, TXT, HTML · Comics: CBZ, CBR, CBT · Office files: DOCX, XLSX, PPTX · Multi-Page images: TIFF · Archives: ZIP, GZIP, RAR, TAR, 7-ZIP packages of above files. Features: · Horizontal / Vertical Flip · Continuous Scroll · Lock Stray: Keep scroll straight · Margin Crop · Focus Mode: Keep page position on flipping zoomed pages · Smarty Focus: Recognize page border bias in Focus Mode · RtL Text: Support Top-to-Bottom, Right-to-Left(TB-RL) text · Single Column: Support scanned dual-spread PDF page · Color Palette · Font Size selectable · Text Select and more operations ·…

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/elementdavv/chaka |
| Platforms | Android |
| Built with | Java |
| GitHub stars | 124 |
| License | AGPL-3.0-or-later (open source) |
| F-Droid | https://f-droid.org/packages/net.timelegend.chaka.viewer.app/ (package net.timelegend.chaka.viewer.app) |
| F-Droid anti-features | none flagged |
| Google Play | not linked |
| App Store | not linked |
| Website | none listed |
| Official | no |
| Category | E-book, PDF & RSS readers |
| Latest release | v1.27.1a.27 (Sep 17, 2026) |
| Last commit | Sep 17, 2026 |

F-Droid builds its apps from source and flags anti-features: https://f-droid.org/en/docs/Anti-Features/

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