When comparing Markdown Editor Chrome App vs Letterspace, the Slant community recommends Letterspace for most people. In the question“What is the best Markdown editor for OS X?” Letterspace is ranked 26th while Markdown Editor Chrome App is ranked 30th. The most important reason people chose Letterspace is:
Features Markdown support that many other text editors don't; such as Todo's ( -[x] ) and Strikethrough.
Ranked in these QuestionsQuestion Ranking
Pro Tiny but powerful
Runs inside chrome as a plugin. It's got a pretty small footprint but does not lose any features.
Pro Advanced Markdown support
Pro @mentions and #tags for easy organization
Pro Simple, yet powerful interface
Keyboard shortcuts for basic text formatting. A few theme options. Full screen mode and swipe gestures.
Pro Full featured iOS app
This was a iOS first app and that is clear. Great swipe bar interface on iOS.
Con Unavailable for people who don't have Chrome installed
Since it's a Chrome plugin, you need to have Chrome or Chromium installed to use it.
Con No in-app Markdown preview
You can export to PDF or HTML with formatting, but no preview in the Mac app.