ReadEra vs Readest

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.

Readest is an ebook reader for EPUB, PDF, MOBI, AZW3, FB2, CBZ and TXT files, with additional listed support for ZIP and Markdown. Readers can highlight, bookmark, take notes and search across their ebook library. Parallel Read presents two books together with synchronized scrolling and navigation. The app can translate passages, look up words in Wiktionary or Wikipedia, and read books aloud using on-device, browser or cloud text-to-speech. It connects to OPDS catalogs and calibre libraries, and can export highlights to Readwise or Hardcover. Readest runs on the web, Windows, macOS, Linux, iOS and Android, and supports screen readers and offline reading. The software is open source under AGPL-3.0. Ebooks, notes, highlights and bookmarks are stored locally by default; optional third-party cloud sync requires a paid plan. The free plan includes 500 MB of cloud storage, and paid plans start at $4.99/mo.