Draftonn Desktop

Draftonn is a simple and easy-to-use note-taking app built from the ground up for students and productivity enthusiasts. It's primary and foremost goal is to be a simple distraction-free note-taking app that students can use to take notes. With the desktop version, you will be able to focus more on what you are doing without the distractions from the traditional web browser. The desktop version also allows for faster speeds and better performance overall.

Seems like no way to try it out without paying?

Is it available on Mac? Doesn't say which operating systems it's for.