When comparing Focused vs Quiver, the Slant community recommends Quiver for most people. In the question“What are the best Markdown editors for OS X?” Quiver is ranked 16th while Focused is ranked 30th. The most important reason people chose Quiver is:
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.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Distraction free writing experience
Focused's interface is quite minimalistic and allows you to focus on the writing and the writing only. There's nothing that may distract the user.
Pro Integrated Markdown viewer
You won't need an additional app to preview generated content.
Pro Stress-free writing
Very uncomplicated. Creates a stress free writing environment.
Pro Comes from a good stable
Developer has produced other well-designed and stable apps.
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 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 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 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 Might be abandoned
There has not been any update for quite some time.

Con Clunky interface
The interface is somewhat clunky and using it just isn't all that enjoyable.
Con Cannot publish directly to wordpress or other blogging platforms
Con No footnotes support
Doesn't handle MultiMarkdown footnotes well - or at all.
Con The "music" won't be to everyone's tastes
Focused uses various soundtracks to keep the user focused on the writing. But these soundtracks are built-in and may not be liked by everyone.
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.
