The author here. I am ready to answer any questions about KatLang. The future plan is to create android app and I hope that it will become the future calculator. I have been postponing android app creation for years, but now KatLang is in good shape and I can continue with tool development.
I think, that there is needed Android app - calculator using KatLang syntax. That (or maybe iOS version) would make You care about it. I am planning to use KatLang syntax for physics tests in schools. Physics formulas can be defined using KatLang syntax. That is experimental idea, but I believe, that it can make a difference.
