Chaka

Releases

• Sep 17, 2026 1.27.1a.27
  - vertical scrollers are added to content windows - links in help window are opened with default browser instead of in place - a button titled “Landscape” is added to change landscape/portrait view manually - in flip horizontal and rtl text mode, or flip vertical and not rtl text mode, default minimum scale of non reflowable documents(eg. PDFs) is increased to fit the page height or width to the window, now a button titled “Fit Screen” is added to view the whole page - under some dark palettes, images may looks horrible, now an option named “Image Follow Palette” is added which makes all images remain unchanged if the option is cleared - other improvements
• Aug 27, 2026 1.27.1a.26
  - add supports of outline, text select/search and hyperlinks for djvu document
• Aug 8, 2026 1.27.1a.25
  - add djvu document support
• Jul 15, 2026 1.27.1a.24
  - add document type support of cbr, cbt, and package of rar, tar, 7-zip
• May 18, 2026 1.27.1a.23
  - backend mupdf updated: 1) include Common Vulnerabilities and Exposures(CVE) 1.25-1.27. 2) improve html table render. - decrease page margin for reflowable documents to get more render space. However the page margin setting in html page inside those documents are still respected. This behavior make some documents seems can't be cropped. - same document opened in same window in recent apps overview when opened through same route. - improve transparent system bars display both in latest Android versions and older versions, mitigate page content blocking by navigation bar. - recalculate slider bar height to make it not overlap with navigation bar. - center vertically slider seek line inside slider bar. - update background color of content(Toc and bookmarks) window to make the display consistent with help window. - rewrite exit function implementation to make both routes of double tap title and back press behave similar.

  More…

  - add additional zip mimetype to make zip documents enabled in file picker dialog.
• Apr 27, 2026 1.24.9a.22
  - text select toolbar implemented. operations of copy, share, translate and more are supported.
• Apr 3, 2026 1.24.9a.21
  - support android 15(sdk 35) - support 16KB page size - support F-Droid arch specific builds - support code optimizer - same document opened in same window in recent apps view - improve display experience
• Mar 10, 2026 1.24.9a.20
  - add fullscreen option - add toolbar on bottom option - add global default options - add left/right swipe gestures support in contents/help window - use double tap to make bookmarks instead of long press - fix a bug with extreme long txt file
• Jan 26, 2026 1.24.9a.19
  - add global default options - fix a bug with extreme long txt file