I'm still looking for a good note-taking app. I've tried a few:

* Stackedit: Not developed anymore, I've encountered many bugs.

* Typora: It's very good, as a couple of bugs but it's probably the best to me at the moment.

* Ghostwriter: What I'm trying out these days.

Honestly, my problem with Typora (and also with this MedleyText) is that they aren't opensource.