Caret is 122.7 MB while Mou is 7.4 MB and iA Writer is 19.7 MB and even Ulysses is 34.5 MB. Very inefficient. Footnotes can't have paragraphs or blockquotes. Single document only. It's a pity as their website is beautiful. Relatively high CPU usage when in use with slow drop. It's difficult to recommend Caret in comparison to the competition.
Just purchased and love it already. Supports GitHub Flavored Markdown and the PDF export is very accurate, better than all the others I have tried. Looking forward to continual improvements and support from the vendor.