Readbook - Text/Image Viewer

It is a large-capacity text file viewer + scanned image viewer. It also provides convenient explorer function and TTS function.

1. Convenient Explorer

- The list UI provides various filter functions, sorting functions, and also provides a filter function for words entered by the user.

- Folder/file name change and deletion functions are possible.

- Google/Naver review search of the file name of the selected item is possible with one click.

- Google Drive can be used.

- SD card can be used.

- File search function

- Preview thumbnail

2. User-friendly theme

- 12 preset themes are provided.

- Custom text color, background color, and font can be changed.

- Font size, line spacing, left and right margins, top margin, bottom margin can be changed.

- Spaces and line breaks are compensated to improve readability. - Incomplete text display is not possible

- Save and Load Theme Settings

3. Viewer

- Supports horizontal and vertical modes

- Page navigation

- Search text in documents

4. Control functions

- Move pages with volume keys

- Use screen scroll function

- Move pages with touch

- Prevent automatic screen off

5. TTS

- Change engine, change voice, change speed, change volume

- Provide notification UI

- Support timer function, skip hanja option

6. Scan Image Viewer

- Automatically selects split mode, 2-page mode.

- Provides dark, light, and clear filters.

- Provides dark theme.

7. Others

- Remember the last viewed file and location

- Recent file list function

- Bookmark function

For errors and inconveniences, please request through [Side menu > Send inquiry email] in the app.

[Permission description]

- File reading permission: Used to read files in all paths of the device.

- Access to all files: From OS 11, 'File reading permission' has been replaced with 'Access to all files' by Google policy.