I want my knitting calculator to work across apps, websites, servers, and command-line tools. I compare Swift with Kotlin Multiplatform, consider where each creates friction, and explain why I am choosing an unfamiliar language to build the calculator.

What started as a question about AI assistants led me back to a mobile architecture idea I already loved. Here’s why I’m building my knitting calculator as a standalone library, with a command-line tool as its first interface.

After comparing a handful of documentation tools, I found MkDocs with the Material theme was the best fit for my project.