Readbook - Text, Image Reader

Readbook is a large-capacity text and scanned image/PDF viewer with an integrated file explorer and powerful read-aloud (TTS) features. It opens plain text, PDF and photo-scanned pages, remembers last read positions, supports bookmarks and recent files, and connects to Google Drive and SD storage for easy access.

Customize your reading experience with 12 preset themes or your own colors and fonts, adjustable margins, line spacing, and font sizes. Control playback with selectable TTS engines, voices, speed and volume, plus a timer and notification UI. Built-in scan image modes, preview thumbnails, file search, volume-key page turns, and unreadable-text compensation make large documents and scanned books easy to read. For support, use the app’s side menu to send an inquiry email. Note: the app requests file access permissions to read device storage per OS requirements.