TATEditor is an application that allows you to create and edit text in vertical writing.
You can write novels scripts scenarios etc. ​​in vertical writing mode on Android.
It also supports dark mode and you can choose your favorite colors in the editor.
It also has a PDF output function and you can create manuscript data only with this app.

Main functions:
- Automatic backup of text being edited
- Incremental search and replacement of strings
- Regular expressions
- Copy / Cut / Paste
- Real-time character counter
- Dark mode on / off
- Font switching
- Change background color / text color
- Vertical PDF output
- Supports ruby in Aozora Bunko format etc.
- Supports emphasis marks side points tate-chu-yoko
- Notes associated with projects and texts
- Management of stories and chapters of series works
- Character code can be automatically detected from texts other than Unicode.

Website: https://www.cc4966.net
Author account: https://twitter.com/496_
Development blog: https://www.pixiv.net/fanbox/creator/13749983