AlReader vs Moon Reader

Free Android reader that supports formats fb2, fbz, txt, epub, html, doc, odt, rtf, mobi, prc, archives. Its local library allows to sort books by author, series, title, year of publication, genre. The app provides such functions as converting text to speech, downloading from OPDS, setting file encoding, dictionaries, editing Fb2 and TXT files, profiles with independent settings of font, color, brightness, gamma correction and text indentation. You can choose one- and two-page reading mode with automatic switching to two-page mode in landscape orientation. Appearance adaptation for E-Ink screens, support for "fast" update for Sony T1/T2, Nook Simple Touch/Nook Simple Touch with Glow Light, Onyx Maxwel/Kopernik/Kepler, Texet 138.

Popular Android app that lets read books offline or directly from online book sites and OPDS. It features a comfortable viewing mode with smooth scrolling, full set of visual settings: line spacing, font size, bold, italic, shadow, alpha channel, smooth edge transitions. Over 10 built-in themes, including a day/night mode switch. Various page navigation options: touchscreen, volume keys, even the camera, search, or back buttons. The free version is ad-supported, while the paid version offers TTS engine, PDF support, more beautiful backgrounds, fonts and reading themes, password protection on startup, annotation sharing, reading statistics.