Readbook - Text, Image Reader 2.3.9

This application serves as a comprehensive large-capacity viewer for text files, scanned images, and PDF documents. It also incorporates an efficient explorer feature and text-to-speech (TTS) capabilities.

1. Explorer Functionality

• The list interface offers advanced filtering and sorting options, including user-defined keyword filters.
• Functions to rename and delete folders and files are supported.
• With a single click, users can search for file names on Google or Naver to facilitate file identification.
• Integration with Google Drive is available, enabling cloud storage access.
• Supports access from SD cards.
• Includes a robust file search feature.
• Displays preview thumbnails for quick content identification.

2. Customizable User Interface

• Provides 12 preset themes for immediate selection.
• Allows customization of text colors, background colors, and fonts.
• Enables adjustment of font size, line spacing, margins (left, right, top, bottom).
• Addresses spacing and line break issues to enhance readability; incomplete text display is prevented.
• Saves and loads personalized theme settings for convenience.

3. Document Viewer Features

• Supports both horizontal and vertical viewing modes.
• Offers intuitive page navigation tools.
• Includes text search functionality within documents.

4. Control Options

• Page navigation can be assigned to volume keys for easier access.
• Scroll functions are accessible via on-screen controls and touch gestures.
• Avoids automatic screen timeout during use to maintain user convenience.

5. Text-to-Speech Capabilities

• Allows switching between different TTS engines and voices.
• Provides adjustable speech speed and volume controls.
• Includes notification-based UI for TTS operations.
• Supports timer functions and options to skip hanja pronunciations for clarity.

6. Scanned Image Viewer

• Automatically selects optimal display modes such as split or two-page views.
• Offers various filters including dark, light, and clear options.
• Supports a dark theme for comfortable viewing in low-light environments.

7. Additional Features

• The application remembers the last opened file and position for seamless resumption.
• A recent files list facilitates quick access to previous documents.
• The bookmarking feature allows users to mark important locations within files.

For bug reports or feature requests, please use the 'Send Inquiry Email' option located in the side menu of the app.

[Permission Details]

• 'File reading' permission enables the app to access files across all device directories.
• From OS version 11 onwards, 'Access to all files' is required due to updated Google policies replacing the previous permission model.