Readbook - Text Viewer

It is a large text file viewer.[main function]- Large file processing- Supports text-to-speech (TTS) function- Supports TTS engine change and voice change function- Open Google Drive files- SD card recognition- Bookmark function- Recent file list- File Explorer sorting options, filtering options- Delete file, change file name- Text search function- Page navigation- Change text size, line spacing, left and right margins, and top and bottom margins- Change font color and background color- Remember the last viewed file and location- Move pages with volume keys- Supports horizontal and vertical modes====================For errors or inconveniences, please request them through [Side Menu > Send Inquiry Email] within the app.====================[Description of Permissions]- Read file: Used to read the file of the device (Starting from Android 11, it will be replaced with access to all files)[Major update information]* 1.6.7 (2024/06/11)- Added read files and unread files filtering options to the file list screen- Added Go to currently open file function in the file list screen- Added color value input function when changing font color and background color.- TTS engine selection function added- Added filtering options to the bookmark list and recent file list.* 1.6.5 (2024/05/13)- Search UX/UI advancement- Advanced search function- Enhancement of file opening function- Some UI and basic options changed* 1.6.3 (2024/04/11)- Added text-to-speech (TTS) function- Supports mouse wheel function* 1.5.5 (2024/02/12)- Added undo function to navigation bar- Improved help screen* 1.5.4 (2024/02/07)- Added Show page movement animation option (default value is off)* 1.5.3 (2024/01/30)- Bug fix: Fixed a bug where the top and bottom bars were not displayed when tapping the center of the screen when the Move pages by touch option was turned off.- Increased screen scrolling speed by 3 times* 1.5.2 (2024/01/24)- Added help tooltip pop-up when starting the app* 1.5.0 (2024/01/23)- UI, UX changes and improvements- Change of basic theme and reorganization of screen setting units- Added top and bottom margin settings- Added file deletion and file name change functions- Add inquiry function- Create a developer blog* 1.3.6 (2023/10/06)- Some UI changes* 1.3.4 (2023/10/02)- Added options to the file open screen* 1.3.3 (2023/09/04)- Fixed SD card recognition error for devices with OS11 or higher* 1.3.2 (2023/08/29)- Added 2 detailed options (use screen scroll function, page movement by touch)* 1.3.1 (2023/08/28)- Compatible with OS 13* 1.2.2 (2021/09/23)- Detailed settings - Added automatic screen off prevention function- Added in-app notification pop-up function- Added push notification function* 1.2.1 (2021/09/15)- Fixed 2 Google crash errors- (fixed kotlin 1.5.21 bug, fixed crash error when opening large files)* 1.2.0 (2021/09/12)- Menu: Add Bookmark, Add Bookmark List- Menu: Add file information- Menu: Add recent files (list of recently opened files)- (Due to changes in the way files and settings are saved, recent files and some settings must be reset)* 1.1.4 (2021/09/01)- Added status bar display setting- Added quick menu display setting- Added user guide* 1.1.3 (2021/07/14)- Fix OS 10 text file invisible error* 1.1.2 (2021/05/29)- UI fix* 1.1.1 (2020/03/04)- Add text search function