KyBook 3 vs Librera Reader

KyBook 3 is an e-book reader and cataloging app for iOS, with macOS support on Apple M1 Macs running macOS 11 or later. It opens EPUB, DRM-free PDF, MOBI, AZW3, DjVu, FictionBook, comic-book, audiobook, plain-text and rich-text files. Reading controls include day, night and sepia themes, scrolling, curl or slide page turns, auto scrolling and text-to-speech. Readers can mark passages, add bookmarks and draw annotations, then export those annotations as Markdown, HTML, PDF or RTF. OPDS support includes a list of known catalogs and the ability to add catalogs such as a Calibre content server. Files can come from listed cloud services, SMB/CIFS shares or WebDAV. The app can serve device files over Wi-Fi and stream audiobooks from cloud storage. Synchronization of metadata, files and reading activity requires a subscription. Pro features require a one-time purchase. The free download includes in-app purchases.

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.