리드북readbook - 텍스트 뷰어텍본 is a utility and tools application available on Android. It is designed for viewing text files, specifically novels. Currently, it provides simple functionality.

The app allows users to navigate through pages, change the font size, line spacing, and margins. Users can also customize the text and background colors. One useful feature is the ability to remember the last read file and position. Users can use the volume keys to navigate between pages and the app supports both portrait and landscape modes. Additionally, it recognizes SD cards and includes a text search function.

The app has undergone several updates, with the latest versionintroducing features such as bookmarking, file information display, and a recent files list. The developers have also addressed bugs and made improvements to the user interface.

Please note that any errors or inconveniences can be reported through reviews, as contacting the developer directly is not advised.