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Web reader and app

The right page, on every device.

Open a book in the browser, set a bookmark, close the tab. On the phone, the Android app picks up at the same page, even offline. When two devices disagree, you choose.

Les Misérables · Victor Hugo

In 1815, M. Charles-François-Bienvenu Myriel was Bishop of D—. He was an old man of about seventy-five years of age; he had occupied the see of D— since 1806.
Public-domain excerpt: Les Misérables, Victor Hugo (1862), translated by Isabel F. Hapgood (1887).

The web reader.

Table of contents, previous and next chapter, font, size, line spacing, width and theme; these display settings stay in your browser. Your position is saved with your account and tied to the file you read: switching version never applies another file’s position. If another session saved a newer position, the reader tells you instead of overwriting it. The displayed content is sanitized: no script from the EPUB runs.

Bookmarks and notes, yours alone.

Add a bookmark marks where you are; select a passage then Note this passage attaches a note of up to 4,000 characters. No other member, owner included, sees them. Each annotation stays tied to the version it was set on; those from another version show separately. 1,000 bookmarks and notes per book and per account. The mobile app shares them, the My data export includes them.

Reading sync

Who moved on? Here’s what happens.

Your phone, the web reader and your KOReader devices share one position format. When only one device has moved on, everything follows without asking. When two devices were read separately, the app shows you both positions and lets you pick.

What sync does depending on which device moved on
Who moved on?What happens
Another deviceThe phone jumps to the new position.
This phoneIts position is sent to your account.
BothYou choose: the server's position, yours, or later.

The exact position is only exchanged for a file identical to the one in your account. A book matched only by its title shares the percentage. Neither the phone's clock nor the "furthest percentage" decides for you.

Library Manager ReaderAndroid · free · open source

Mobile app

Your books everywhere, even offline.

An e-reader for your phone, built to work with your library. Read offline, download your books from library-manager.com and land on the right page on every device.

Version
0.6.5
Released
Oct 15, 2026
Size
116 MB
License
GPL-3.0

Android, installed directly. Not on Google Play yet, and no iOS version is distributed.

Inside the app

A real e-reader, not just a file viewer.

Your library and reading work without a connection. A Library Manager account is optional: it adds your online books and syncing.

Library

  • Import from your phone, with a report that explains every rejected file.
  • A cover grid that shows how far you are in each book.
  • Series read from the metadata and sorted by volume.
  • Title, author and series edited right inside the file.
  • A 30-day trash and ZIP export.

Reading

  • EPUB, MOBI, AZW3 and CBZ; CBR files are converted on import and the original is left alone.
  • Six fonts, including Literata, Atkinson Hyperlegible and OpenDyslexic, with adjustable size, line spacing and margins.
  • Day, sepia, night or automatic themes.
  • Bookmarks, highlights in four colours and notes.
  • In-book search, definitions, translation and read-aloud.

Account and sync

  • Secure sign-in to library-manager.com; the app never stores your password.
  • Browse your spaces and download or upload books, each file checked against its fingerprint.
  • Reading position synced both ways.
  • Works with KOReader and kosync servers.
  • Exports include KOReader progress files.

Installation

Install the APK in four steps.

  1. Download

    Get the APK file from this page, on your phone.

  2. Allow

    Android asks you to allow installs from your browser or file manager. You can withdraw that permission afterwards.

  3. Install

    Open the downloaded file and confirm. Updates install the same way.

  4. Sign in

    In the settings, link the app to your library-manager.com account if you want your online books and syncing.

Check the SHA-256 fingerprint

This is the published fingerprint for library-reader-0.6.5-production.apk. Compare it with the one your computer calculates:

5a8c038834b485b78d3875d260d51bad76a6882659f0e6bbc0e0cfdec59da1e5
sha256sum library-reader-0.6.5-production.apk

Privacy

What stays on your phone.

  • Your books, notes and reading position are stored on the phone. Reading needs no connection.

  • The network is only used by the features you use: definitions (the word goes to Wiktionary), translation (the selected text goes to the translation service), and your account and kosync when you are signed in.

  • Sign-in tokens are kept in the system keychain and never appear in logs.

  • A cloud book is copied, checked, then read from the local file; it is never read remotely.

FAQ

Frequently asked questions

Is there an iPhone or iPad version?

Not yet. The app is only distributed for Android, as an APK file. On iPhone, the library-manager.com web reader still works in the browser.

Do I need a Library Manager account?

No. The app reads the books on your phone without an account. Signing in adds your online books, uploads and reading sync.

Does the app cost anything?

No, it is free and open source. The library-manager.com account has its own plans, including a free plan for 100 books.

How do I update it?

Download the new APK from this page and install it over the old one: your books and settings are kept.

Where is the source code?

On GitHub, under the GPL-3.0 license. Each release also publishes the exact sources of the compiled APK.

All questions

Start reading on your phone.

Install the app, then link it to your library whenever you want your books and your page everywhere.