KOReader vs ReadEra

KOReader has no write-up on Specifiction yet; its figures are above.

ReadEra is an app for reading books, magazines, articles, and documents without ads or registration. It opens formats including EPUB, MOBI, AZW3, FB2, PDF, DjVu, DOC, DOCX, RTF, ODT, TXT, CBR, and CBZ, along with files inside ZIP or RAR archives. The app detects books and documents and organizes them through reading lists, author and series groups, collections, sorting, and folder tools. Readers can add bookmarks, quotes, notes, translations, dictionary lookups, and text selections. Controls include search, contents, page history, display modes, and settings for fonts, margins, hyphenation, zoom, brightness, and rotation. Multiple books or documents can be read at once, including in split-screen. Kids mode offers a simplified interface, parental control, and child-specific filtering and collections. Premium syncs books, documents, progress, bookmarks, and quotes with Google Drive, and adds background text-to-speech. ReadEra is available on Android, iOS, and macOS. The free plan costs nothing; Premium costs $14.99, paid once.