Librera Reader vs Universal Viewer

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.

Universal Viewer is a Windows desktop application for opening a wide range of file formats in one viewer. It handles images, multimedia, Word and Excel files, PDF, RTF, internet formats, text, and formats supported by Total Commander Lister plugins. Image support includes over 40 graphics formats and RAW images from 400+ cameras; its multimedia player supports over 170 formats without external codecs. In the Pro version, Word and Excel files including DOCX and XLSX open without MS Office, and a PDF plugin works without Adobe or Foxit Reader. Pro also adds complex RTF and RAW image support, an image panel with a Convert to feature, and highlighted text search. Text mode handles files of unlimited size, including those over 4 GB, with encodings such as Unicode and UTF-8. Windows Explorer context-menu integration provides a way to open files in the viewer. The free edition’s multimedia support depends on the Windows Media Player engine. Listed system requirements include Windows XP, Vista, 7, 8, 10, and 11. The Pro version has a 15-day trial; paid access starts at $26.