In version 1.13, I accidentally introduced a bug where the settings menu cannot be opened on iPad, but this is scheduled to be fixed in iOS version 1.14.0. (Thank you to the person who reported this.)
I am currently requesting an Expedited Review so that the fix can be released as soon as possible.
Kosshi 1.14
Kosshi 1.14 is now out. The Mac version is available, and the iOS version is currently under review.
What's New
You can now set a maximum line width to keep outlines readable on large screens.
New Features
Improvements
Fixes