Whats in GZreader

GZreader is a package of KOReader with a few of its plugins, ZenOS, and GZreader's own plugin. Based on KOReader v2026.07.1 and ZenOS 4.3.2 (tools/gzreader/UPSTREAM in the repository); the version is in GZREADER_VERSION.

What's kept

Kept	Why
zenos.koplugin	The interface: Home, Downloads, the tab bar, the setup guide, settings. English only.
coverbrowser.koplugin	Required by ZenOS's library views.
statistics.koplugin	Feeds ZenOS's Home reading-stats widgets.
autosuspend.koplugin	Battery.
gzreader.koplugin	GZreader itself: the setup page (QR code or address + PIN: connections, sending books), the Grimmory library browser, downloads, progress, bookmark and highlight sync, the quick panel, Notes, Calendar, Music, audiobooks, read aloud, sync with a computer, updates, debug reports and diagnostics.

Added: an English dictionary (Open English WordNet, CC BY 4.0, 11 MB), and GZreader's launchers for each Kindle (KUAL, the Kindle 2/3/DX launchpad, a home-screen item on touch Kindles, an app icon on the Nook 1st Edition).

What's left out

All of KOReader's other bundled plugins (34 in the Kindle 2/3/DX package; including KOReader's own progress sync: GZreader syncs with Grimmory itself), the SSH/SFTP binaries, KOReader's OTA updater (it would replace this build with stock KOReader; GZreader updates itself from its GitHub releases), the 16 MB CJK fallback font, the UI translations, and KOReader's first-run quickstart document (ZenOS's setup guide replaces it).

The packages

Each release has one package per kind of device, plus the update every device downloads:

Package	For	Install
gzreader-kindle-legacy-<version>.zip	Kindle 2, Kindle Keyboard (3), DX, DX Graphite	Kindle 2, 3, DX
gzreader-kindle-<version>.zip	Kindle 4, Kindle Touch (and Paperwhite 1, untested)	Kindle 4 and Touch
gzreader-kindlepw2-<version>.zip	Paperwhite 2 and newer on firmware 5.6.1 – 5.16.2.x	Touch Kindles, firmware ≤ 5.16.2
gzreader-kindlehf-<version>.zip	Any Kindle on firmware 5.16.3 or newer	Touch Kindles, firmware 5.16.3+
gzreader-nook-1st-edition-<version>.zip	Nook 1st Edition (test build)	Nook 1st Edition
gzreader-nook-<version>.zip	Nook Simple Touch, with or without GlowLight (test build)	Nook Simple Touch
gzreader-update.zip	Every device: what Settings → General → Updates and the sync page install (Lua only, ~6 MB, the same for all)	Updates

The Lua code is the same in every package; what differs is KOReader's native programs for that device (built by KOReader for the Kindles, and by GZreader without floating point for the Nook 1st Edition) and the launchers.