Liseur

Liseur is an open-source ebook reader for Android. It opens EPUB books stored on your phone, and it is also a client for calibre-web, Komga and liseur-sync, so the books on your own server share a shelf with the ones on the device — and the page you stopped on follows you from one to the other.

It works offline, has no ads and no account of its own, and asks for nothing beyond the server you point it at.

Reading EPUB books

* Paginated EPUB rendering through the Readium toolkit, full screen by default
* Tap right to go forward, left to go back, the middle for the controls; volume keys work too
* A whole page always fits the screen, with no stray scrolling to catch the last line
* Four reading themes — Light, Sepia, Dark and a black night mode for OLED screens — independent of the app's own theme
* Four bundled open fonts or the publisher's own, plus size, line spacing, margins and brightness
* Time left in the chapter, time left in the book, page or percentage, and a scrubber with chapter ticks

Highlights, notes and dictionary

* Highlights in four colours, notes, and bookmarks with a corner ribbon
* A notebook of everything you marked in a book, exportable as Markdown
* Search the whole book, with snippets and jump-to highlighting
* Definitions for any selected word, or a hand-off to an offline dictionary app. Online lookups are off until you turn them on, and you choose which Wiktionary edition or mirror answers them

Your ebook library

* Index folders of EPUBs on the device or an SD card, covers and all
* Books you are using sort to the front; finished ones get a tick
* Pull to refresh picks up whatever changed behind the app's back

Your own book server: calibre-web, Komga, liseur-sync

* calibre-web: one screen sets it up with URL, username and password, and Liseur works out the catalog, download rights and sync token
* Komga: paste the server address and an API key
* liseur-sync: sign in or paste a device token; it also syncs books that never came from a server
* Your server's books merge into the same library with a cloud badge; tap one to download and open it
* Reading positions sync both ways — exactly where you left off, on Komga and liseur-sync
* Remove the copy on the device, or delete the book from the server

Free software

No trackers, no analytics, no proprietary dependencies. The only network traffic is to the book server you configured and, if you switch online definitions on, to the dictionary site you chose.

Builds are now reproducible, and F-Droid will ship the developer-signed APK after verifying its own rebuild matches. Heads-up for F-Droid users: this changes the signing key once. Updating from an older F-Droid install needs an uninstall and reinstall, which wipes the local library, reading positions and annotations. Fresh installs and installs from GitHub are unaffected.