KurobaEx is a fast Android app for browsing imageboards, such as 4chan and 8chan. It's a fork of Kuroba. This fork provides lots of new features:

• New technological stack (Kotlin, RxJava/Coroutines, Room etc).

• On demand content loading (includes prefetching, youtube videos titles and durations fetching, inlined files size fetching etc).

• Third-party archives support.

• New thread navigation (tabs).

• New in-app navigation (bottom nav bar).

• New bookmarks (they were fully rewritten from scratch, now use way less memory, don't use wakelocks, show separate notifications per thread (and notifications can be swiped away).

• Edge-to-edge theme support.

• New database.

• 4chan global search support.

• Fully dynamic themes with Android Q Day/Night mode support.

• Per-site proxies.

• Ability to attach multiple media files to reply, attach media files that was shared by external apps (even by some keyboards), attach remote media files by URL, etc.

• New image downloader. Allows downloading images while the app is in background, retrying failed to download images, resolving duplicates, etc.

• New posting. Posting code was moved into a foreground service which now allows stuff like using automatic captcha solvers (2captcha API) seamlessly or queueing multiple replies in different threads (only one reply per thread).

• New Media Viewer. It was rewritten from scratch and now lives in a separate activity. It now also supports stuff like viewing links to media files shared into the app.

• Thread downloader with ability to export threads as HTML pages with all downloaded media.

• Composite catalogs (ability to combine multiple boards of any available sites (except archives) together into a single catalog).

• Mpv video player (downloadable).

• Bookmark groups with ability to setup regex matchers to automatically move newly created bookmarks into them.

• Automatic captcha solver for 4chan captcha (See https://github.com/K1rakishou/4chanCaptchaSolver)

• Lots of other tiny improvements.

Latest beta version

All beta versions

• 4Chan
• Dvach
• 8Kun (thanks to @jirn073-76)
• 420Chan (thanks to @Lolzen)
• Lainchan
• Sushichan
• Wired-7 (thanks to @Wired-7)
• 370chan.info (thanks to @alcharkov)
• Endchan
• Kohlchan
• Vhschan (thanks to @MrPurple666)
• YesHoney (thanks to @SomeGuy719)

• ArchivedMoe
• ArchiveOfSins
• B4k
• DesuArchive
• Fireden
• 4Plebs
• Nyafuu
• TokyoChronos
• Warosu
• Wakarimasen.moe
• RozenArcana

Kuroba is GPLv3, licenses of the used libraries.