When comparing Haroopad vs Quiver, the Slant community recommends Haroopad for most people. In the question“What are the best Markdown editors for OS X?” Haroopad is ranked 7th while Quiver is ranked 16th. The most important reason people chose Haroopad is:
Haroopad has multiple available themes to choose from and new ones can be easily built with CSS.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Very customizable
Haroopad has multiple available themes to choose from and new ones can be easily built with CSS.
Pro Multiplatform support
Runs on Mac, Windows and Linux with 32-bit and 64-bit binary packages available.
Pro Completely free
Haroopad is a free and open source Markdown Editor.
Pro Various publishing and export options
Haroopad can publish to Wordpress, Evernote, Tumblr and MediaWiki and export to EPub, ReStructured Text, RTF and PDF.
Pro Mathematical expressions support
Haroopad supports mathematical expressions through LaTeX and MathJax.
Pro Supports MathJax
Mathematical equations can be exported to the browser by using MathJax, a JavaScript display engine with a lot of great features such as typography support and modular output.
Pro Allows embedding content from a wide variety of sources
Content from YouTube, Twitter, Vimeo, Slideshare, Flickr, Instagram, Soundcloud, Wikipedia and Pastebin can be embedded in the document.
Pro The Markdown flavor can be extended
Haroopad supports GitHub Markdown flavor out of the box. But the functionality can be extended to support additional Markdown features.
Pro Vi key bindings
For people used ti vi/vim, Haroopad can be set up to be used with vi keybindings.
Pro Dual License
GPL3 license is applied to the current version and will be applied in the future to meet the internal dual licensing scheme.
Commercial use follows Apache license v2 (APLv2) for keeping the GPL license and non-commercial use under consideration.
Pro Has more features than just a simple Markdown editor
Quiver is a notebook and note-taking app akin to Evernote which happens to also be able to edit Markdown files. As such, it has a lot of useful features such as: image support, file attachments, web content support and more.
Pro Supports code highlighting
Has syntax highlighting for more than 120 programming languages.
Pro Live preview
Quiver has live preview for both Markdown and LaTeX. This helps users to better understand the way they are formatting their files.
Pro Notes can be linked to each-other
Quiver notes have unique links that can be copied and pasted into other notes to gain quick access between them.
Pro Cloud syncing
Dropbox, iCloud Drive, Google Drive, or any other file-based cloud services.

Pro Supports vi keybindings
For people used to vi keybindings, Quiver can be set up to work with them.
Pro Combination of different types of writing in one note
The most outstanding thing for me. Use HTML line breaks while writing MD text.
Also, unlike most hybrid editors like Bear, it supports instant image sizing and respective preview.
Cons
Con English translation is iffy
The software was initially developed in Korean for Korean users and later translated and ported to English. The translation to English has not been perfect and there may be some weird expressions and grammatical errors along the way.
Con Documentation is in Korean
The official documentation is in Korean, so it may be a bit hard for non-Korean speakers to find their way around Haroopad.
Con Windows installer does not support easy admin installation
It can't request the necessary privileges to install to C:\Program Files.
Con Undo sometimes loses control about the selection
Select some text, select a formatting in the Markdown Syntax Helper view, undo.
Con Code pane is dark in default theme
Can be hard to read and a bit hard to find where to change it.
Con You can't edit specific files, they must be in your notebook
Con No iOS apps for editing, only a viewer available
I'd LOVE to edit and create quiver notes on my iPad!
Con The line in focus shows a border around it which is distracting
The line in focus in the editor shows a rounded rectangular border around it, which is unappealing and distracting.
Con Much more than a simple Markdown editor
Since it's more like a note-taking app (and a note-taking app built for developers) than a Markdown editor, it may be a little excessive to use it only for its Markdown editing features.
