Calibre-Web vs Librera Reader

Calibre-Web is a web app for browsing, reading, and downloading eBooks stored in a Calibre database. Its library tools include advanced search and filtering, custom shelves, metadata editing, and plugin-based metadata downloads. It supports in-browser reading for multiple formats and accepts uploads in various formats, including audio. An OPDS feed lets reader apps access the library, and a one-click option sends eBooks to e-readers. Kobo devices can sync with the library when the optional Kepubify tool is installed. Administrators can manage users and per-user permissions, restrict downloads for logged-in users, allow public registration, and hide content by category. Authentication options include LDAP, Google and GitHub OAuth, and proxy authentication. The project is GPL v3 licensed and free. Supported platforms are web, Windows, macOS, Linux, and self-hosted deployments. The README recommends pip installation in a Python virtual environment and also links to pre-built LinuxServer Docker images for x64 and aarch64.

Librera Reader is an ebook and document reader for Android, with a browser-based reader and a macOS beta also listed. It opens formats including PDF, EPUB, MOBI, DjVu, FB2, TXT, RTF, AZW, AZW3, HTML, CBZ, and CBR. Readers can locate files by scanning folders, browsing with the in-app file explorer, or returning to recent items. Reading tools include bookmarks, annotations, text search, EPUB3 tables of contents, and adjustable Day and Night modes. Progress and bookmarks can sync between Android devices through Google Drive. The app also offers configurable text-to-speech with a built-in media player, online catalogs, cloud sources, and online and offline dictionaries. Access can be restricted with a password or the device’s fingerprint authentication. The free plan is ad-supported; Librera PRO removes ads and costs 5.99 USD once. The maker lists Kyiv, Ukraine as its headquarters.