Both iA Writer and Typora are excellent minimal
Markdown editors, sharing a lot of the same features.
iA Writer
iA Writer stands out as a more polished, aesthetically pleasing product.
Typora
Typora's signature trick is the live preview of Markdown. It's also quite a bit cheaper than iA Writer.
Fan of minimal writing apps? 🤔
Maybe Paper is what you're looking for.
